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Journal articles on the topic 'Catalyst material'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Xu, Jiayi, Colton Lund, Prajay Patel, Yu Lim Kim, and Cong Liu. "Recent Advances on Computational Modeling of Supported Single-Atom and Cluster Catalysts: Characterization, Catalyst–Support Interaction, and Active Site Heterogeneity." Catalysts 14, no. 4 (2024): 224. http://dx.doi.org/10.3390/catal14040224.

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To satisfy the need for catalyst materials with high activity, selectivity, and stability for energy conversion, material design and discovery guided by theoretical insights are a necessity. In the past decades, the rise in theoretical investigations into the properties of catalyst materials, reaction mechanisms, and catalyst design principles has shed light on the catalysis field. Quantitative structure–activity relationships have been developed through incorporating spectroscopic simulations, electronic structure calculations, and reaction mechanistic studies. In this review, we report the s

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2

Kaplunenko, Volodymyr, and Mykola Kosinov. "Electric field - induced catalysis. Laws of field catalysis." InterConf, no. 26(129) (October 18, 2022): 332–51. http://dx.doi.org/10.51582/interconf.19-20.10.2022.037.

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Abstract.The article explores a new type of catalysis - electric field catalysis. The laws of field catalysis are given. The characteristics of the electric field are determined, which set the values of the characteristics of the field catalysis. Field catalysis and field catalyst do not fit into the traditional definition of catalysis and catalyst, which may require a revision of the terminology of catalysis. The field is a more versatile catalyst compared to material catalysts, both in terms of its application to a wider range of chemical reactions, and in the ability to control the rate and

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3

Li, Haobo, Jianping Xiao, Qiang Fu, and Xinhe Bao. "Confined catalysis under two-dimensional materials." Proceedings of the National Academy of Sciences 114, no. 23 (2017): 5930–34. http://dx.doi.org/10.1073/pnas.1701280114.

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Confined microenvironments formed in heterogeneous catalysts have recently been recognized as equally important as catalytically active sites. Understanding the fundamentals of confined catalysis has become an important topic in heterogeneous catalysis. Well-defined 2D space between a catalyst surface and a 2D material overlayer provides an ideal microenvironment to explore the confined catalysis experimentally and theoretically. Using density functional theory calculations, we reveal that adsorption of atoms and molecules on a Pt(111) surface always has been weakened under monolayer graphene,

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Albinsson, David, Stephan Bartling, Sara Nilsson, Henrik Ström, Joachim Fritzsche, and Christoph Langhammer. "Operando detection of single nanoparticle activity dynamics inside a model pore catalyst material." Science Advances 6, no. 25 (2020): eaba7678. http://dx.doi.org/10.1126/sciadv.aba7678.

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Nanoconfinement in porous catalysts may induce reactant concentration gradients inside the pores due to local conversion. This leads to inefficient active material use since parts of the catalyst may be trapped in an inactive state. Experimentally, these effects remain unstudied due to material complexity and required high spatial resolution. Here, we have nanofabricated quasi–two-dimensional mimics of porous catalysts, which combine the traits of nanofluidics with single particle plasmonics and online mass spectrometry readout. Enabled by single particle resolution at operando conditions duri

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Shinde, Preeti S., Pradnya S. Suryawanshi, Kanchan K. Patil, et al. "A Brief Overview of Recent Progress in Porous Silica as Catalyst Supports." Journal of Composites Science 5, no. 3 (2021): 75. http://dx.doi.org/10.3390/jcs5030075.

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Porous silica particles have shown applications in various technological fields including their use as catalyst supports in heterogeneous catalysis. The mesoporous silica particles have ordered porosity, high surface area, and good chemical stability. These interesting structural or textural properties make porous silica an attractive material for use as catalyst supports in various heterogeneous catalysis reactions. The colloidal nature of the porous silica particles is highly useful in catalytic applications as it guarantees better mass transfer properties and uniform distribution of the var

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Ye, Junchen, Dianhui Wang, Yan Zhong, Hao Liu, Wenyi Wang, and Nini Wei. "A new strategy for insulators to improve the ability of semiconductors to reduce Cr (VI)." Journal of Physics: Conference Series 2713, no. 1 (2024): 012067. http://dx.doi.org/10.1088/1742-6596/2713/1/012067.

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Abstract Insulators have always been a kind of material that has not been valued in the field of catalysis. In order to expand its application in the field of photocatalytic treatment of heavy metal ions, a series of CdS/SrCO3 catalysts are prepared. XRD proves the successful synthesis of the composite catalyst, and TEM reveals the tight connection between CdS and SrCO3. Transient photocurrent and electrochemical impedance spectroscopy show that the composite catalyst has a better electron-hole pair separation effect and electron transport rate than the two single-phase materials. The catalyst

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Vilas Bôas, Renata, Laura de A. de Almeida, and Marisa F. Mendes. "Techno-economic evaluation of biodiesel production using by-product as raw material and hydrotalcite-hydroxyapatite as catalyst." Research, Society and Development 11, no. 4 (2022): e0511426977. http://dx.doi.org/10.33448/rsd-v11i4.26977.

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Biodiesel is one of the main sources of renewable energy that can be obtained from oils and fats by transesterification. However, biodiesel produced from vegetable oils as a raw material is expensive. Thus, an alternative and inexpensive raw material such as vegetable oil deodorizing distillate (VODD) can be used as a raw material for the production of biodiesel. In this study, technical-economic analyzes were carried out in the biodiesel production process using VODD as raw material and hydrotalcite-hydroxyapatite as heterogeneous catalyst. Four different scenarios were considered for the eco

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8

Teng, Yingyue, Dingze Liu, Qiang Li, Xue Bai, and Yinmin Song. "Research Progress on Application in Energy Conversion of Silicon Carbide-Based Catalyst Carriers." Catalysts 13, no. 2 (2023): 236. http://dx.doi.org/10.3390/catal13020236.

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In modern industrial production, heterogeneous catalysts play an important role. A catalyst carrier, as a constituent of heterogeneous catalysts, is employed for supporting and loading active components. The catalyst carrier has a considerable impact on the overall acting performance of the catalysts in actual production. Therefore, a catalyst carrier should have some necessary properties such as a high specific surface area, excellent mechanical strength and wear resistance, and better thermal stability. Among the candidate materials, silicon carbide (SiC) has excellent physical and chemical

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9

Asri, Nyoman Puspa, Yohannes Somawiharja, Yustia Wulandari Mirzayanti, Diah Agustina Puspitasari, Rachmad Ramadhan Yogaswara, and Jia-Ming Chern. "Fly ash utilization as support of nano zinc oxide composite catalyst for methanolysis of kapok (Ceiba Pentandra) seed oil." Engineering Solid Mechanics 12, no. 4 (2024): 343–52. http://dx.doi.org/10.5267/j.esm.2024.6.002.

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This study focuses on developing a nano zinc oxide (ZnO) catalyst with fly ash (FA) as a support material for converting kapok seed oil (KSO) into biodiesel. This research aims to study the preparation of nano ZnO/FA solid catalysts and the catalyst's reactivity towards kapok seed oil biodiesel (KSOB) products. The catalysts were synthesized using a modification of the Stober process, which is the co-precipitation, impregnation, and precipitation step co-occurred. The catalyst is prepared on base condition using sodium hydroxide with a solvent of methanol and zinc chloride as a raw material. F

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10

Nisa, Shofirul Sholikhatun, Anisa Raditya Nurohmah, Cornelius Satria Yudha, et al. "Utilization of Spent Nickel Catalyst as Raw Material for Ni-Rich Cathode Material." Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan 18, no. 2 (2021): 349–57. http://dx.doi.org/10.14710/presipitasi.v18i2.349-357.

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Spent nickel catalyst will be harmful to the environment if it is not processed or used properly. In fact, this waste still has a high nickel content. The treatment of spent nickel catalysts has been widely reported, but limited to nickel extraction. Since the lithium-ion batteries demand is continued to increase, then nickel is the most sought-after metal. Consequently, nickel from spent nickel catalysts could be developed as secondary source for lithium-ion battery cathode. This study aims to utilize spent nickel catalysts into more valuable materials. Nickel that has been extracted and mixe

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11

Yang, Shuhua, Qian Guan, Zijie Li, et al. "Study on the Influence of Different Catalysts on the Preparation of Ethyl Levulinate from Biomass Liquefaction." Journal of Biobased Materials and Bioenergy 14, no. 3 (2020): 396–400. http://dx.doi.org/10.1166/jbmb.2020.1979.

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The liquefaction experiments of straw biomass under heating and pressure were carried out with sulfuric acid and three ionic liquids as catalysts, 1-Butyl-3-methylimidazolium chloride ([BMIM] [Cl]), 1-Butyl-3-methylimidazolium hydrogen sulfate ([BMIM] [HSO4]), 1-methyl-3-(4-sulfobutyl) imidazole bisulphate ([HSO3-BMIM] [HSO4]), and anhydrous ethanol as solvent. The effects of catalyst type and dosage, reaction time and reaction temperature on liquefaction were investigated and optimized. The results showed that under the catalysis of sulfuric acid, the yield of ethyl levulinate was the highest

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12

Plavniece, Ance, Aleksandrs Volperts, Galina Dobele, et al. "Wood and Black Liquor-Based N-Doped Activated Carbon for Energy Application." Sustainability 13, no. 16 (2021): 9237. http://dx.doi.org/10.3390/su13169237.

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Fuel cells, batteries and supercapacitors are critical to meet the rising global demand for clean, sustainable energy. Biomass-derived activated carbon can be obtained with tailored properties to fulfil the extensive need for low-cost, high-performance, catalyst and electrode materials. To investigate the possibility of nanoporous nitrogen-doped carbon materials as catalysts in fuel cells and electrodes in lithium-ion batteries, biomass precursors were thermochemically activated with NaOH at 800 °C, nitrogen was introduced using dicyandiamide and doping was performed at 800 °C. The chemical co

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13

Haerudin, Hery, Silvester Tursiloadi, Galuh Widiyarti, and Wuryaningsih Sri Rahayu. "EFFECT OF PREPARATION METHOD OF Ni CATALYST USING BENTONITE AS THE SUPPORT MATERIAL." Indonesian Journal of Chemistry 3, no. 2 (2010): 118–25. http://dx.doi.org/10.22146/ijc.21895.

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Nickel catalyst has been prepared impregnation and precipitation with nickel content of 20% and 25% each using bentonite as support material. The effects of the preparation method were studied using temperature programmed oxidation (TPO) and temperature programmed reduction (TPR) and by determination of its specific surface area. The activity of catalysts has been tested in the hydrogenation of palm oil. The catalyst with 20% of nickel and prepared by impregnation shows a single peak at 301°C, compared to catalyst with 25% of nickel prepared by the same method which has a peak at 304°C and a s

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14

Matluck Ayomide Afolabi, Henry Chukwuemeka Olisakwe, and Thompson Odion Igunma. "A conceptual framework for designing multi-functional catalysts: Bridging efficiency and sustainability in industrial applications." Global Journal of Advanced Research and Reviews 2, no. 2 (2024): 058–66. http://dx.doi.org/10.58175/gjarr.2024.2.2.0059.

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This paper presents a conceptual framework for designing multi-functional catalysts that bridge the dual objectives of efficiency and sustainability in industrial applications. The framework emphasizes three core elements: material selection, catalyst engineering, and process optimization. The framework addresses key challenges in catalyst design by focusing on sustainable and cost-effective base materials, incorporating nano-structured components to enhance catalytic efficiency, and integrating these catalysts into industrial processes to minimize waste and energy consumption. Applications in

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15

Li, Xian Feng, Jin Bing Li, Jian She Chen, et al. "Development and Application of YS Silver Catalysts for Ethylene Epoxidation." Advanced Materials Research 418-420 (December 2011): 1760–67. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1760.

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Ethylene oxide (EO) is an important organic chemical material, and Silver catalyst is an important petrochemical catalyst and is regarded as the core of EO/EG production process. The catalyst's performance is the major factor that directly determines the economic efficiency of commercial production of ethylene oxide. In this paper, we will introduce the development and application of YS silver catalysts developed by Beijing Research Institute of Chemical Industry, SINOPEC.

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16

Personick, Michelle L., Matthew M. Montemore, Efthimios Kaxiras, Robert J. Madix, Juergen Biener, and Cynthia M. Friend. "Catalyst design for enhanced sustainability through fundamental surface chemistry." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2061 (2016): 20150077. http://dx.doi.org/10.1098/rsta.2015.0077.

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Decreasing energy consumption in the production of platform chemicals is necessary to improve the sustainability of the chemical industry, which is the largest consumer of delivered energy. The majority of industrial chemical transformations rely on catalysts, and therefore designing new materials that catalyse the production of important chemicals via more selective and energy-efficient processes is a promising pathway to reducing energy use by the chemical industry. Efficiently designing new catalysts benefits from an integrated approach involving fundamental experimental studies and theoret

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17

Burnat, Dariusz, Roman Kontic, Lorenz Holzer, Patrick Steiger, Davide Ferri, and Andre Heel. "Smart material concept: reversible microstructural self-regeneration for catalytic applications." Journal of Materials Chemistry A 4, no. 30 (2016): 11939–48. http://dx.doi.org/10.1039/c6ta03417a.

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This paper presents a proof-of-concept study and demonstrates the next generation of a “smart” catalyst material, applicable to high temperature catalysis and electro-catalysis such as gas processing and as a catalyst for solid oxide cells.

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18

Simson, Sander, Jaak Nerut, Meelis Härmas, et al. "(Digital Presentation) The Utilization of Platinum Catalysts Deposited on Carbon Support Synthesized from Coffee Grounds in a Polymer Electrolyte Membrane Fuel Cell." ECS Transactions 111, no. 5 (2023): 93–103. http://dx.doi.org/10.1149/11105.0093ecst.

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In this study, carbon support material, derived from coffee grounds was used in the preparation of Pt catalysts for polymer electrolyte membrane fuel cell (PEMFC) application. The carbon material was synthesized using ZnCl2 activated pyrolysis method and the Pt nanoparticles were deposited onto carbon support by two methods: using ethylene glycol or hydrogen as a reducing agent. Synthesis of the catalyst materials on coffee ground derived carbon was successful and produced materials with desirable physical and electrochemical properties. Synthesis through the ethylene glycol reduction method,

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19

Trigoura, Leslie, Yalan Xing, and Bhanu P. S. Chauhan. "Recyclable Catalysts for Alkyne Functionalization." Molecules 26, no. 12 (2021): 3525. http://dx.doi.org/10.3390/molecules26123525.

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In this review, we present an assessment of recent advances in alkyne functionalization reactions, classified according to different classes of recyclable catalysts. In this work, we have incorporated and reviewed the activity and selectivity of recyclable catalytic systems such as polysiloxane-encapsulated novel metal nanoparticle-based catalysts, silica–copper-supported nanocatalysts, graphitic carbon-supported nanocatalysts, metal organic framework (MOF) catalysts, porous organic framework (POP) catalysts, bio-material-supported catalysts, and metal/solvent free recyclable catalysts. In add

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20

Garg, Pulkit. "A Review of the Catalysts Used in Propane Ammoxidation Reaction to Produce Acrylonitrile." International Journal for Research in Applied Science and Engineering Technology 11, no. 3 (2023): 2083–103. http://dx.doi.org/10.22214/ijraset.2023.49891.

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Abstract: Background: Various catalysts were studied to synthesize acrylonitrile via propane ammoxidation. The catalysts used for this process can be categorized as antimony-based catalysts, molybdenum-based catalysts, zeolites, nitride material catalysts, and other catalysts. The catalyst which was proved to be an efficient catalyst among all other catalysts is the mixed metal oxide catalyst MoVNbTe due to its high selectivity and yield.

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Simson, Sander, Jaak Nerut, Meelis Härmas, et al. "(Digital Presentation) The Utilization of Platinum Catalysts Deposited on Carbon Support Synthesized from Coffee Grounds in a Polymer Electrolyte Membrane Fuel Cell." ECS Meeting Abstracts MA2023-01, no. 38 (2023): 2295. http://dx.doi.org/10.1149/ma2023-01382295mtgabs.

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Exploring alternative sources for platinum catalyst carbon support material is vital for the further development of polymer electrolyte membrane fuel cells (PEMFC).1 The support material and the method of depositing Pt nanoparticles are crucial for defining the catalytic properties of the catalyst. In this study, carbon support material, derived from coffee grounds was used in the preparation of Pt catalysts for PEMFC application. The carbon material was synthesized using ZnCl2 activated pyrolysis method2 and the Pt nanoparticles were deposited onto carbon support by two methods: using ethylen

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Cottone, Grazia, Sergio Giuffrida, Stefano Bettati, et al. "More than a Confinement: “Soft” and “Hard” Enzyme Entrapment Modulates Biological Catalyst Function." Catalysts 9, no. 12 (2019): 1024. http://dx.doi.org/10.3390/catal9121024.

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Catalysis makes chemical and biochemical reactions kinetically accessible. From a technological point of view, organic, inorganic, and biochemical catalysis is relevant for several applications, from industrial synthesis to biomedical, material, and food sciences. A heterogeneous catalyst, i.e., a catalyst confined in a different phase with respect to the reagents’ phase, requires either its physical confinement in an immobilization matrix or its physical adsorption on a surface. In this review, we will focus on the immobilization of biological catalysts, i.e., enzymes, by comparing hard and s

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23

Valadares, Deborah da Silva, Juliene Oliveira Campos de França, Roberto Chaves Fernandes, Luiz Marcos Dezaneti, Sílvia Cláudia Loureiro Dias, and José Alves Dias. "Liquid Phase Calorimetric Method as a Tool for Acid Strength Measurements and Application to a Variety of Sustainable Catalysts." Chemistry 5, no. 2 (2023): 1138–70. http://dx.doi.org/10.3390/chemistry5020078.

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It has been about 36 years since the first published paper about the calorimetry and adsorption (Cal-Ad) method by Prof. Drago. These separated methods are very old and important characterization tools for different molecules and materials, as recognized in chemistry. The idea of coupling these two techniques arose from the need to have more information about the thermodynamic parameters of a catalyst. The Cal-Ad method provides a measure of the magnitude (Ki), strength (−∆Hi), and quantity (ni) of sites present in a catalyst. The original idea is based on the application of the donor-acceptor

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Hartley, Will, Timothy O’Riordan, and Andrew Smith. "Aryloxide-Promoted Catalyst Turnover in Lewis Base Organocatalysis." Synthesis 49, no. 15 (2017): 3303–10. http://dx.doi.org/10.1055/s-0036-1589047.

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This short review highlights select examples of enantioselective Lewis base promoted reactions that use tertiary amine (cinchona alkaloids, isothioureas, and DMAP/PPY derivatives) or NHC catalysts and employ aryloxide-promoted catalyst turnover from an acyl ammonium or azolium intermediate. This review focuses on the range of strategies that have been developed within this area, and discusses their evolution and context.1 Introduction2 Phenols as Additives To Promote Catalyst Turnover2.1 NHC Catalysis with α-Functionalised Aldehydes and Phenols2.2 Enantioselective Fluorination with Aryloxide-P

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25

Hariharan. T, Prakash S M, T. Brindha, Deepti Pal, Pratik Bhogle, and M. P. Mallesh. "Innovative Catalysts for Sustainable Chemical Processing: A Materials Engineering Perspective." Metallurgical and Materials Engineering 31, no. 4 (2025): 289–98. https://doi.org/10.63278/1438.

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To provide sustainability to the chemical process, innovative catalysts have to be developed to improve reaction efficiency and reduce the environmental impact. This thesis investigates the advanced catalytic materials: single atom catalysts; biomass derived functional materials; and nanostructured catalysts for hydrogen production. Optimized catalyst performance was achieved with various fabrication techniques including, but not limited to, cold plasma assisted synthesis and electrospinning. In terms of catalytic efficiency for hydrogen peroxide synthesis, single atom catalysts provided 35 %

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Mohammad Zainol, Muzakkir. "Effect of Calcination Temperature on Sulfonated Lignin Catalyst Preparation for Glucose Ethanolysis to Ethyl Levulinate." Scientific Research Journal 21, no. 1 (2024): 99–116. http://dx.doi.org/10.24191/srj.v21i1.25200.

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An abundance of biomass material is generated globally which has the potential to be converted to various bio-based chemicals including ethyl levulinate (EL). EL is well known as a sustainable fuel additive and can be produced from glucose, a biomass derivative in an ethanolysis reaction throughout acidic catalysis. In this study, sulfonated lignin carbon catalysts were used to catalyze the ethanolysis of glucose to synthesize EL. The catalysts were prepared from lignin via calcination at different soaking temperatures (400 to 600 °C) for 1 h to produce carbon material, followed by sulfonation

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27

Qu, Jia, and Shaohong You. "Review on the Application and Preparation of Ozone Catalysts." E3S Web of Conferences 423 (2023): 02008. http://dx.doi.org/10.1051/e3sconf/202342302008.

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This paper reviews the recent advances in the application of ozone catalysts and their preparation. The main categories of ozone catalysts are introduced, and the properties of the more widely used metal oxide catalysts, supported catalysts, carbonaceous material catalysts and novel catalysts are summarized. The supported catalysts and carbonaceous material catalysts have better catalytic effect compared with metal oxide catalysts. The four most commonly used catalyst preparation methods are reviewed, and the prospects for catalyst development based on the current research status are presented

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Meier, Josef C., Carolina Galeano, Ioannis Katsounaros, et al. "Design criteria for stable Pt/C fuel cell catalysts." Beilstein Journal of Nanotechnology 5 (January 16, 2014): 44–67. http://dx.doi.org/10.3762/bjnano.5.5.

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Platinum and Pt alloy nanoparticles supported on carbon are the state of the art electrocatalysts in proton exchange membrane fuel cells. To develop a better understanding on how material design can influence the degradation processes on the nanoscale, three specific Pt/C catalysts with different structural characteristics were investigated in depth: a conventional Pt/Vulcan catalyst with a particle size of 3–4 nm and two Pt@HGS catalysts with different particle size, 1–2 nm and 3–4 nm. Specifically, Pt@HGS corresponds to platinum nanoparticles incorporated and confined within the pore structu

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Perkins, Ethan Matthew, Stoyan Bliznakov, Leonard J. Bonville, and Radenka Maric. "Advancing Pemwe Catalysis with Small Particle Size Titanium Oxide-Supported Iridium Via Reactive Spray Deposition Technology." ECS Meeting Abstracts MA2025-01, no. 38 (2025): 1902. https://doi.org/10.1149/ma2025-01381902mtgabs.

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Central to PEMWE’s performance is the oxygen evolution reaction (OER) catalyst, which plays a critical role in determining overall efficiency and cost. Currently, iridium-based materials are the most effective OER catalysts, but iridium’s scarcity and prohibitive expense present a major barrier to widespread PEMWE adoption. Reducing the amount of iridium required, without compromising the activity or durability of the catalyst, is therefore a key research priority. Achieving this would enable PEMWE systems to deliver green hydrogen at a lower price, enhancing the economic viability of this cle

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Fedoryshyn, O. S. "Acid transesterification of oils with ethanol on carbon catalysts." Catalysis and Petrochemistry, no. 33 (2022): 74–83. http://dx.doi.org/10.15407/kataliz2022.33.074.

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The main advantages and disadvantages of solid-phase catalysts for transesterification reactions of oils with alcohols are analyzed. Tests of the sulfonated and phosphated solid - phase catalysts synthesized by us in the transesterification reaction of rapeseed oil with 96% ethanol in order to obtain biodiesel were carried out. The chemical resistance of sulfonated synthetic (S-SCS) and synthesized from natural raw materials (S-KAU) catalysts was compared. The reasons for low chemical resistance of sulfonated carbon-containing materials are determined. Synthetic S-SCS catalysts proved to be th

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Zhu, Yuhua, Yuan Yao, Zhu Luo, et al. "Nanostructured MoO3 for Efficient Energy and Environmental Catalysis." Molecules 25, no. 1 (2019): 18. http://dx.doi.org/10.3390/molecules25010018.

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This paper mainly focuses on the application of nanostructured MoO3 materials in both energy and environmental catalysis fields. MoO3 has wide tunability in bandgap, a unique semiconducting structure, and multiple valence states. Due to the natural advantage, it can be used as a high-activity metal oxide catalyst, can serve as an excellent support material, and provide opportunities to replace noble metal catalysts, thus having broad application prospects in catalysis. Herein, we comprehensively summarize the crystal structure and properties of nanostructured MoO3 and highlight the recent sign

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Chen, Wei, Lawrence F. Allard, Paul C. Dinh, Ming-Shin Tzou, and Kevin McIIwrath. "Microcharacterization of New Platinum Catalysts for Hydrosilylation Reactions." Microscopy and Microanalysis 7, S2 (2001): 1082–83. http://dx.doi.org/10.1017/s1431927600031482.

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Organofunctional silanes are the key intermediates for production of silicon polymeric chemicals. Traditionally, platinum catalysts on carbon support materials have been used for these hydrosilylation reactions. The efficiency of the current commercial Pt/C catalyst is not very satisfactory, so a catalyst of platinum on aluminum oxide support was developed to accelerate the reactions. The Pt/Al2O3catalyst greatly increases both reaction and conversion rates. However, the acidic nature of the supporting material is sometimes undesirable. Recently, a new class of platinum-copper bimetallic catal

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Ochoa, Elba, Daniel Torres, José Luis Pinilla, and Isabel Suelves. "Nanostructured Carbon Material Effect on the Synthesis of Carbon-Supported Molybdenum Carbide Catalysts for Guaiacol Hydrodeoxygenation." Energies 13, no. 5 (2020): 1189. http://dx.doi.org/10.3390/en13051189.

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The impact of using different nanostructured carbon materials (carbon nanofibers, carbon nanotubes, graphene oxide and activated carbon) as a support for Mo2C-based catalysts on the hydrodeoxygenation (HDO) of guaiacol was studied. To optimise the catalyst preparation by carbothermal hydrogen reduction (CHR), a thermogravimetric study was conducted to select the optimum CHR temperature for each carbon material, considering both the crystal size of the resulting β-Mo2C particles and the extent of the support gasification. Subsequently, catalysts were prepared in a fixed bed reactor at the optim

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Mahmudi, Haris, and Lia Fatul Mukaromah. "Pengaruh temperatur terhadap hasil proses pirolisis pada ban bekas pakai." Jurnal Mesin Nusantara 1, no. 1 (2018): 19. http://dx.doi.org/10.29407/jmn.v1i1.12292.

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The purpose of this research is to know the influence of temperature variation on the process of pyrolysis tires and catalyst. The method used in this research is the real experimental method. With temperature as independent variable and viscosity value, density and flash point as dependent variable. While the condenser temperature and pressure as a control variable. The results showed the effect of temperature on the results obtained. At a temperature of 350 º C from pure tire material obtained as much as 190 ml, and at a temperature of 350 º C of tire material and the catalyst obtained resul

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Grzeszczak, Jadwiga, Agnieszka Wróblewska, Beata Michalkiewicz, Małgorzata Dzięcioł та Katarzyna Janda-Milczarek. "Oxidation of α-Pinene on the Ti-SBA-15 Catalyst Obtained Using Orange Peel Waste as Components of the Synthesis Gel". Molecules 30, № 7 (2025): 1627. https://doi.org/10.3390/molecules30071627.

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α-Pinene is a very valuable natural raw material for organic syntheses, which is of increasing interest to scientists due to its renewability and relatively low price. This work presents the studies on the oxidation of α-pinene in the presence of two mesoporous titanium-silicate catalysts: standard Ti-SBA-15 and Ti-SBA-15 material, which was obtained by a new and green way using orange peel waste as bio-templates (Ti-SBA-15_orange peels). For the synthesis of the Ti-SBA-15 catalysts, the following raw materials were used: Pluronic P123 as the template (template usually used in the synthesis of

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Qi, Chen, Somboon Chaemchuen, Meng Liu, Jichao Wang, Serge Zhuiykov, and Francis Verpoort. "Metal Embedded Porous Carbon for Efficient CO2 Cycloaddition under Mild Conditions." Catalysts 12, no. 4 (2022): 427. http://dx.doi.org/10.3390/catal12040427.

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Nitrogen-doped porous carbon material was generated via thermal pyrolysis of zeolitic imidazole frameworks (ZIFs). The structure of the ZIF templates was tuned, so that the obtained product was an N-doped porous carbon-containing encapsulated metal nanoparticle. The hierarchical structural and unique properties of pyrolyzed materials are involved in further application, including catalysis. The as-synthesized porous carbon materials were applied as a catalyst for CO2 fixation on cyclic carbonates under near ambient pressure without solvent and co-catalyst. The zinc dispersion in highly porous

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Lai, Xiao Lin, Hua Jiang Deng, Zong Hua Wang, and Jian Hua Guo. "Synthesis and Safety Evaluation of a New Enteric Coating Material." Advanced Materials Research 266 (June 2011): 157–60. http://dx.doi.org/10.4028/www.scientific.net/amr.266.157.

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A series of styrene-maleic anhydride (SMA)-ethanol polymers with different degree of esterification (DE) were synthesized, they had different pH-sensitive values and could be used as enteric coating materials. SMA-ethanol (DE50%) was used as the model compound to evaluate the safety as an enteric coating material, the results of acute toxicity tests showed that there was no acute toxicity. The reaction condition such as catalysts, catalyst amount, reaction time and temperature were also evaluated, the results indicated that the triethylamine (TEA) was the optimal catalyst, when methyl ethyl ke

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Giang, Nguyen Thi Chau, Nguyen Huu Luong, Dao Thi Kim Thoa, Huynh Minh Thuan, and Nguyen Manh Huan. "Enhanced performances of Fischer-Tropsch catalysts modified with Re as a promoter and supported on various structured materials." IOP Conference Series: Earth and Environmental Science 1226, no. 1 (2023): 012029. http://dx.doi.org/10.1088/1755-1315/1226/1/012029.

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Abstract This paper presents enhanced performances of Fischer-Tropsch (F-T) catalysts modified with Re as a promoter and supported by various structured materials. The traditional Fe-Co based catalyst was prepared by the simultaneous impregnation and then application of the wash-coating slurry method to coat the catalyst on structured materials, including monolith and metallic foams. Their physicochemical properties of the catalysts were characterized by Brunauer–Emmett–Teller specific surface area, and hydrogen temperature programmed reduction. The reaction was carried out at the temperature

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Buasri, Achanai, Thaweethong Inkaew, Laorrut Kodephun, Wipada Yenying, and Vorrada Loryuenyong. "Natural Hydroxyapatite (NHAp) Derived from Pork Bone as a Renewable Catalyst for Biodiesel Production via Microwave Irradiation." Key Engineering Materials 659 (August 2015): 216–20. http://dx.doi.org/10.4028/www.scientific.net/kem.659.216.

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The use of waste materials for producing biodiesel via transesterification has been of recent interest. In this study, the pork bone was used as the raw materials for natural hydroxyapatite (NHAp) catalyst. The calcination of animal bone was conducted at 900 °C for 2 h. The raw material and the resulting heterogeneous catalyst were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and the Brunauer-Emmett-Teller (BET) method. The effects of reaction time, microwave power, methanol/oil molar ratio, catalyst loading and reusability of cataly

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Li, Gui Hua, and An Feng Wang. "Oxidative Esterification of Methacrolein to Methyl Methacrylate over La Doped Catalyst." Advanced Materials Research 512-515 (May 2012): 2390–93. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2390.

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In this present work, rare earth elements La was added to catalysts for the oxidative esterification of methacrolein (MAL) to methyl methacrylate(MMA). Catalysts were characterized by means of BET techniques. Effects of La proportion, material liquid pH and catalyst amount on catalytic performance were investigated. The results indicated that the addation of La in appropriate proportion could improve the catalyst’s activity. 1.0% was found to be the optimum La additional amount. Under the condition of reation temperature 323K, w%(catalyst) 3.6%, proportion of La in the catalyst 1%, pH of mater

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Kim, Taewoo, Byoung-Suhk Kim, Tae Hoon Ko, and Hak Yong Kim. "In-Situ Polymerization for Catalytic Graphitization of Boronated PAN Using Aluminum and Zirconium Containing Co-Catalysts." Inorganics 13, no. 1 (2025): 16. https://doi.org/10.3390/inorganics13010016.

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In-situ polymerization is an effective method for integrating co-catalysts homogeneously into the polymer matrix. Polyacrylonitrile (PAN)-derived highly graphitized carbon is a state-of-the-art material with diverse applications, including materials for energy storage devices, electrocatalysis, sensing, adsorption, and making structural composites of various technologies. Such highly graphitized materials can be effectively obtained through in-situ polymerization. The addition of external catalysts during in-situ polymerization not only enhances the polymerization rate but also facilitates the

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Echeverri, David Alexander, Luis Alberto Rios, and Juan Miguel Marín. "Synthesising unsaturated fatty alcohols from fatty methyl esters using catalysts based on ruthenium and tin supported on alumina." Ingeniería e Investigación 31, no. 1 (2011): 74–82. http://dx.doi.org/10.15446/ing.investig.v31n1.20528.

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Most promising catalysts for synthesising unsaturated fatty alcohols are based on group 8 metals with a promoter like tin, because the process can be carried out in moderate conditions, and these metals are less toxic than chromium. There have been no reports about the use of this catalyst to date using raw materials like methyl ester blends or evaluation reusing catalysts. This paper presents the hydrogenation of methyl esters from palm oil and commercial methyl oleate with Ru-Sn/Al2O3 catalysts prepared by impregnation, at moderate pressure and temperature (5 MPa and 270°C). Greater selectiv

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Ahmed, Hamid, Anis H. Fakeeha, Fayez M. Al-Alweet, et al. "Alumina Coated with Titanium Dioxide Supported Iron for Hydrogen Production and Carbon Nanotubes via Methane Decomposition." Catalysts 15, no. 2 (2025): 122. https://doi.org/10.3390/catal15020122.

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Research on converting methane to hydrogen has gained more attention due to the availability of methane reserves and the global focus on sustainable and environmentally friendly energy sources. The decomposition of methane through catalysis (CDM) has excellent potential to produce clean hydrogen and valuable carbon products. However, developing catalysts that are both active and stable is a highly challenging area of research. Using titanium isopropoxide as a precursor and different loadings of TiO2 (10 wt.%, 20 wt.%, and 30 wt.%), alumina has been coated with TiO2 in a single-step hydrotherma

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Wang, Anping, Wenxuan Quan, and Heng Zhang. "Efficient Synthesis of Biodiesel Catalyzed by Chitosan-Based Catalysts." International Journal of Chemical Engineering 2021 (December 29, 2021): 1–11. http://dx.doi.org/10.1155/2021/8971613.

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Catalysts play an important role in the preparation of biodiesel. It is of great significance to study catalysts with high efficiency, low cost, and easy preparation. Compared with the homogeneous catalyst system, the heterogeneous catalyst is easy to separate and has a better catalytic effect. In heterogeneous catalysts, supports and preparation methods have important effects on the dispersion of active centers and the overall performance of catalysts. However, the supports of existing solid catalysts have defects in porosity, structural uniformity, stability, and specific surface area, and t

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Wang, Jingwen, Jian Sheng, Kai Zhang, et al. "Enhancing Sustainable Production of Biodiesel from Xanthoceras sorbifolia Bunge Oil Using Bio-Based Heterogeneous Catalyst." Catalysts 14, no. 11 (2024): 753. http://dx.doi.org/10.3390/catal14110753.

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The swift exhaustion of natural oil reserves and worsening environmental issues have prompted the quest for an economical method to produce biofuels. The superiority of heterogeneous catalysis promotes the development of bio-based catalysts. Carbon materials prepared from agricultural and forestry biomass waste have good application prospects in catalysis. In the present study, Xanthoceras sorbifolia shell waste was used as the raw material, Xanthoceras sorbifolia Bunge Carbon (XC) was used as the catalyst carrier, and K2CO3 was used as the activator to prepare a heterogeneous catalyst (KXC).

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Shareef, Muhammad Faizan, Muhammad Arslan, Naseem Iqbal, Nisar Ahmad, and Tayyaba Noor. "Development of Hydrotalcite Based Cobalt Catalyst by Hydrothermal and Co-precipitation Method for Fischer-Tropsch Synthesis." Bulletin of Chemical Reaction Engineering & Catalysis 12, no. 3 (2017): 357. http://dx.doi.org/10.9767/bcrec.12.3.762.357-362.

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This paper presents the effect of a synthesis method for cobalt catalyst supported on hydrotalcite material for Fischer-Tropsch synthesis. The hydrotalcite supported cobalt (HT-Co) catalysts were synthesized by co-precipitation and hydrothermal method. The prepared catalysts were characterized by using various techniques like BET (Brunauer–Emmett–Teller), SEM (Scanning Electron Microscopy), TGA (Thermal Gravimetric Analysis), XRD (X-ray diffraction spectroscopy), and FTIR (Fourier Transform Infrared Spectroscopy). Fixed bed micro reactor was used to test the catalytic activity of prepared cata

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Shareef, Muhammad Faizan, Muhammad Arslan, Naseem Iqbal, Nisar Ahmad, and Tayyaba Noor. "Development of Hydrotalcite Based Cobalt Catalyst by Hydrothermal and Co-precipitation Method for Fischer-Tropsch Synthesis." Bulletin of Chemical Reaction Engineering & Catalysis 12, no. 3 (2017): 357. http://dx.doi.org/10.9767/bcrec.12.3.762.357-363.

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This paper presents the effect of a synthesis method for cobalt catalyst supported on hydrotalcite material for Fischer-Tropsch synthesis. The hydrotalcite supported cobalt (HT-Co) catalysts were synthesized by co-precipitation and hydrothermal method. The prepared catalysts were characterized by using various techniques like BET (Brunauer–Emmett–Teller), SEM (Scanning Electron Microscopy), TGA (Thermal Gravimetric Analysis), XRD (X-ray diffraction spectroscopy), and FTIR (Fourier Transform Infrared Spectroscopy). Fixed bed micro reactor was used to test the catalytic activity of prepared cata

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Xin, XU, DONG Xufeng, HUANG Hao, and QI Min. "3D Nitrogen-Doped Porous Carbon Supported Pt Catalyst for Electrocatalytic Oxidation of Glucose." Progress in Chinese Materials Sciences 2, no. 3 (2023): 41–49. http://dx.doi.org/10.48014/pcms.20230403001.

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Glucose fuel cells have attracted widespread attention in the biomedical field due to their ability to generate electrical energy continuously. The development of this technology has great potential in the application of powering implantable medical devices. However, the efficiency of the glucose oxidation reaction at the anode of the fuel cell is low, and a catalyst needs to be added to improve the reaction efficiency. Platinum (Pt) catalysts are prone to agglomerate during use, which limits the improvement of their properties such as catalytic activity and stability. To address this problem,

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Reuillard, Bertrand, Matías Blanco, Laura Calvillo, et al. "Noncovalent Integration of a Bioinspired Ni Catalyst to Graphene Acid for Reversible Electrocatalytic Hydrogen Oxidation." ACS Appl. Mater. Interfaces 12, no. 5 (2020): 5805–11. https://doi.org/10.1021/acsami.9b18922.

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Efficient heterogeneous catalysis of hydrogen oxidation reaction (HOR) by platinum group metal (PGM)-free catalysts in proton-exchange membrane (PEM) fuel cells represents a significant challenge toward the development of a sustainable hydrogen economy. Here, we show that graphene acid (GA) can be used as an electrode scaffold for the noncovalent immobilization of a bioinspired nickel bis-diphosphine HOR catalyst. The highly functionalized structure of this material and optimization of the electrode-catalyst assembly sets new benchmark electrocatalytic performances for heterogeneous molecular

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Krysiak, Olga A., Simon Schumacher, Alan Savan, Wolfgang Schuhmann, Alfred Ludwig, and Corina Andronescu. "Searching novel complex solid solution electrocatalysts in unconventional element combinations." Nano Research, no. 15(6) (June 1, 2021): 4780−4784. https://doi.org/10.1007/s12274-021-3637-z.

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Despite outstanding accomplishments in catalyst discovery, finding new, more efficient, environmentally neutral, and noble metal-free catalysts remains challenging and unsolved. Recently, complex solid solutions consisting of at least five different elements and often named as high-entropy alloys have emerged as a new class of electrocatalysts for a variety of reactions. The multicomponent combinations of elements facilitate tuning of active sites and catalytic properties. Predicting optimal catalyst composition remains difficult, making testing of a very high number of them indispensable. We

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