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Journal articles on the topic 'Palladium-copper catalyst'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Todorova, Totka, Petya Petrova, and Yuri Kalvachev. "Catalytic Oxidation of CO and Benzene over Metal Nanoparticles Loaded on Hierarchical MFI Zeolite." Molecules 26, no. 19 (2021): 5893. http://dx.doi.org/10.3390/molecules26195893.

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In order to obtain highly active catalytic materials for oxidation of carbon monoxide and volatile organic compounds (VOCs), monometallic platinum, copper, and palladium catalysts were prepared by using of two types of ZSM-5 zeolite as supports—parent ZSM-5 and the same one treated by HF and NH4F buffer solution. The catalyst samples, obtained by loading of platinum, palladium, and copper on ZSM-5 zeolite treated using HF and NH4F buffer solution, were more active in the reaction of CO and benzene oxidation compared with catalyst samples containing untreated zeolite. The presence of secondary

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2

Mierczyński, Paweł, Agnieszka Mierczyńska-Vasilev, Waldemar Maniukiewicz, Krasimir Vasilev, and Małgorzata Szynkowska-Jóźwik. "Novel Cu and Pd-Cu Catalysts Supported on Multi-Walled Carbon Nanotubes for Steam Reforming and Decomposition of Methanol." Catalysts 13, no. 3 (2023): 533. http://dx.doi.org/10.3390/catal13030533.

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In this study, multi-walled carbon nanotubes (MWCNTs) were prepared by chemical vapour deposition (CVD) using acetylene as a carbon source over an iron catalyst. As-prepared MWCNTs were used to support modern mono-copper, palladium, and bimetallic palladium-copper catalysts, and their feasibility for hydrogen production was tested during steam reforming of methanol (SRM) and methanol decomposition (DM). The structural characteristics of the MWCNTs were evaluated using the SEM and XRD methods. The physicochemical properties of the monometallic and bimetallic catalysts were analysed using the TP

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3

Wei, Pei-Tsen, and Tzu Chien Wei. "Application in Self-Adsorption Pd Nanoparticles with High Adhesion." ECS Meeting Abstracts MA2023-02, no. 20 (2023): 1231. http://dx.doi.org/10.1149/ma2023-02201231mtgabs.

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Electroless plating (ELP) is widely used to metallize non-conductive substrates in printed circuit board industry. Due to the complexity of commercial palladium catalysts activation procedure and the high price of palladium, we synthesized a type of palladium catalyst with polyvinyl alcohol (PVA) as protector, formaldehyde (HCHO) as reducing agent. We used polyethylimine (PEI) to modify the surface of the substrate in advance. In this study, we developed a one-step catalyst by adding PEI into PVA-Pd. In addition to its stability, the catalyst has self-adsorption property. The process can be op

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4

Alshammari, Hamed M. "Synthesis of Palladium and Copper Nanoparticles Supported on TiO2 for Oxidation Solvent-Free Aerobic Oxidation of Benzyl Alcohol." Processes 9, no. 9 (2021): 1590. http://dx.doi.org/10.3390/pr9091590.

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The use of metal oxides as supports for palladium and copper (Pd–Cu) nanoalloys constitutes a new horizon for improving new active catalysts in very important reactions. From the literatures, Pd-based bimetallic nanostructures have great properties and active catalytic performance. In this work, nanostructures of titanium dioxide (TiO2) were used as supports for Pd–Cu nanoparticles catalysts. Palladium and copper were deposited on these supports using the sol-immobilisation method. The composite nanoalloys were characterized using transmission electron microscopy (TEM) and X-ray photoelectron

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Tarabanko, Valery E., Irina L. Simakova, Marina A. Smirnova, and Konstantin L. Kaygorodov. "Catalytic Hydrogenation of Furfural Diethyl Acetal to Ethyl Furfuryl Ether." Journal of Siberian Federal University. Chemistry 14, no. 3 (2021): 281–89. http://dx.doi.org/10.17516/1998-2836-0237.

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The process of catalytic hydrogenation of furfural diethyl acetal to ethyl furfuryl ether on the different catalysts (palladium, palladium-rhenium and copper-ruthenium on Sibunit in reduced forms) was studied. It was found that hydrogenation of the furan ring with the formation of THF diethyl acetal occurs on all the catalysts. Ethyl furfuryl ether becomes the main product while carrying on the second hydrogenation cycle on spent palladium catalyst (yield and selectivity up to 55 % and 85 %, respectively)

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6

Chen, Longrui, Betsegaw E. Lemma, Jenna S. Rich, and James Mack. "Freedom: a copper-free, oxidant-free and solvent-free palladium catalysed homocoupling reaction." Green Chem. 16, no. 3 (2014): 1101–3. http://dx.doi.org/10.1039/c3gc41847b.

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Herein, we describe a copper-free, oxidant-free, solvent-free homocoupling reaction using a palladium catalyst under mechanochemical conditions. We extended the methodology to palladium catalyst on solid support which showed a different reactivity and different product ratios from the non-supported catalyst.

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7

Elazab, Hany A., M. A. Sadek, and Tamer T. El-Idreesy. "Microwave-assisted synthesis of palladium nanoparticles supported on copper oxide in aqueous medium as an efficient catalyst for Suzuki cross-coupling reaction." Adsorption Science & Technology 36, no. 5-6 (2018): 1352–65. http://dx.doi.org/10.1177/0263617418771777.

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We report here a reliable green method for the synthesis of palladium nanoparticles supported on copper oxide as a highly active and efficient catalyst for Suzuki cross-coupling reaction. The experimental synthetic approach is based on microwave-assisted chemical reduction of an aqueous mixture of palladium and copper salt simultaneously using hydrazine hydrate as reducing agent. The catalyst was fully characterized using various techniques showing well-dispersed palladium nanoparticles. The catalytic activity and recyclability of the prepared catalyst were experimentally explored in the ligan

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8

Mishra, Mritunjay P. C., and Mritunjay Mishra. "Investigating the Influence of Hydrogen Evolution By Copper-Palladium Catalyst on Performance of Zero-Gap CO₂ Electrolyzer through in-Situ Raman and Ex-Situ XPS Techniques." ECS Meeting Abstracts MA2024-02, no. 62 (2024): 4216. https://doi.org/10.1149/ma2024-02624216mtgabs.

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The electrochemical reduction of carbon dioxide (CO2RR) holds promise for mitigating carbon emissions and reuse CO2 for chemical synthesis and energy storage. Among various catalysts, copper-palladium (Cu-Pd) shows potential for converting CO2 into valuable hydrocarbons (C2+ products). However, the efficiency of Cu-Pd catalysts is hindered by the competing hydrogen evolution reaction (HER) during CO2RR. To tackle this issue, we have developed and analyzed Cu-Pd bimetallic catalysts with varying ratios of copper to palladium to understand the mechanisms underlying HER and its impact on CO2 elec

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9

Zhang, Mengyuan, Diru Liu, Yiying Wang, et al. "Recent Advances in Methanol Steam Reforming Catalysts for Hydrogen Production." Catalysts 15, no. 1 (2025): 36. https://doi.org/10.3390/catal15010036.

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The pursuit of carbon neutrality has accelerated advancements in sustainable hydrogen production and storage methods, increasing the importance of methanol steam reforming (MSR) technology. Catalysts are central to MSR technology and are primarily classified into copper-based and noble metal-based catalysts. This review begins with an examination of the active components of these catalysts, tracing the evolution of the understanding of active sites over the past four decades. It then explores the roles of various supports and promoters, along with mechanisms of catalyst deactivation. To addres

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10

Nizam Ahmad, Shahrul, Hadariah Bahron, and Amalina Mohd Tajuddin. "Tetradentate Palladium(II) Salophen Complexes: Synthesis, Characterization and Catalytic Activities in Copper-Free Sonogashira Coupling Reaction." International Journal of Engineering & Technology 7, no. 3.11 (2018): 15. http://dx.doi.org/10.14419/ijet.v7i3.11.15921.

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This paper reports the synthesis and characterization of three salophen ligands; 2,2'-((1E,1'E)-(1,2 phenylenebis(azanylylidene))bis(methanylylidene))diphenol [L1H], 2,2'-((1E,1'E)-(1,2-phenylenebis(azanylylidene))bis (methanylylidene))bis(4-chlorophenol) [L1C] and 2,2'-((1E,1'E)-(1,2-phenylenebis(azanylylidene))bis(methanylylidene))bis(4-methoxylphenol) [L1OME]. The compounds were prepared from condensation reaction between salicylaldehyde, and its derivatives, with ortho-phenylenediamine. Their palladium(II) complexes, namely PdL1H, PdL1C and PdL1OME were synthesized through insertion reacti

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11

BOKENOVA A.B. and DUISEMBIУEV M.ZH. "COPPER ALLOY CATALYSTS IN THE HYDROGENATION OF ANTHRAQUINONE: A TECHNOLOGICAL STUDY." Научный журнал "Вестник Актюбинского регионального университета имени К. Жубанова" 79, no. 1 (2025): 298–305. https://doi.org/10.70239/arsu.2025.t79.n1.36.

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The hydrogenation of anthraquinone is a critical step in the synthesis of hydrogen peroxide, an important industrial oxidant. Traditionally, solid noble metal catalysts such as nickel and palladium have been used for this reaction, but the exploration of alternative catalysts such as copper alloys offers potential advantages in cost and availability, as well as opportunities to tune the catalytic properties. The choice to study anthraquinone hydrogenation using a copper alloy catalyst was driven by the need to overcome the problems associated with noble metal catalysts, including cost and scar

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12

Kiose, Tatyana, Tatyana Rakitskaya, Alim Ennan, Volodymyr Vasylechko, and Halyna Gryshchouk. "Composition and Activity of Copper-Palladium Catalyst on Carbon Fiber Material for Air Purification from Carbon Monoxide." Chemistry & Chemical Technology 17, no. 2 (2023): 272–78. http://dx.doi.org/10.23939/chcht17.02.272.

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A set of research methods (X-ray phase, desorption, kinetic) was used to determine the state of the basic components K2PdCl4 and Cu(NO3)2 in the catalyst for the oxidation of carbon monoxide by oxygen. It was found that the palladium (II) and copper (II) initial compounds under the action of carbon fiber carrier change their state. Palladium is reduced to X-ray amorphous Pd0, and copper (II) is in the form of a crystalline phase Cu2(OH)3Cl. It was found that the catalyst exhibits protective properties within the initial concentrations of carbon monoxide  300 mg/m3 and an effective contact tim

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13

Lakshminarayana, B., L. Mahendar, P. Ghosal, B. Sreedhar, G. Satyanarayana, and Ch Subrahmanyam. "Fabrication of Pd/CuFe2O4 hybrid nanowires: a heterogeneous catalyst for Heck couplings." New Journal of Chemistry 42, no. 3 (2018): 1646–54. http://dx.doi.org/10.1039/c7nj04361a.

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Hybrid heterogeneous catalyst, palladium(0) on copper ferrite nanowires has been synthesized and characterized. Significantly, this catalyst for the first time employed in the Jeffrey Heck reaction between iodo-arenes and allylic alcohols.

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14

Imbao, Jerick, Jeroen A. van Bokhoven, and Maarten Nachtegaal. "Optimization of a heterogeneous Pd–Cu/zeolite Y Wacker catalyst for ethylene oxidation." Chemical Communications 56, no. 9 (2020): 1377–80. http://dx.doi.org/10.1039/c9cc08835k.

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15

Yakoumis, Iakovos, Εkaterini Polyzou, and Anastasia Maria Moschovi. "PROMETHEUS: A Copper-Based Polymetallic Catalyst for Automotive Applications. Part II: Catalytic Efficiency an Endurance as Compared with Original Catalysts." Materials 14, no. 9 (2021): 2226. http://dx.doi.org/10.3390/ma14092226.

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PROMETHEUS catalyst, a copper-based polymetallic nano-catalyst has been proven to be suitable for automotive emission control applications. This novel catalyst consists of copper, palladium and rhodium nanoparticles as active phases, impregnated on an inorganic oxide substrate, CeO2/ZrO2 (75%, 25%). The aim of PROMETHEUS catalyst’s development is the substitution of a significant amount (85%) of Platinum Group Metals (PGMs) with copper nanoparticles while, at the same time, presenting high catalytic efficiency with respect to the commercial catalysts. In this work, an extensive investigation o

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16

Seumer, Julius, and Jan H. Jensen. "Beyond predefined ligand libraries: a genetic algorithm approach for de novo discovery of catalysts for the Suzuki coupling reactions." PeerJ Physical Chemistry 7 (January 6, 2025): e34. https://doi.org/10.7717/peerj-pchem.34.

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This study introduces a novel approach for the de novo design of transition metal catalysts, leveraging the power of genetic algorithms and density functional theory calculations. By focusing on the Suzuki reaction, known for its significance in forming carbon-carbon bonds, we demonstrate the effectiveness of fragment-based and graph-based genetic algorithms in identifying novel ligands for palladium-based catalytic systems. Our research highlights the capability of these algorithms to generate ligands with desired thermodynamic properties, moving beyond the restriction of enumerated chemical

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17

Fierro, J. L. G., J. M. Palacios, and F. Tomás. "Redistribution of Platinum Metals within an Ammonia Oxidation Plant." Platinum Metals Review 34, no. 2 (1990): 62–70. http://dx.doi.org/10.1595/003214090x3426270.

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The powder recovered from the catalyst and catchment systems in a high pressure ammonia oxidation plant has been studied by a variety of analytical means. From this investigation it can be concluded that the powder results from the in-depth degradation of the platinum-rhodium catalyst gauzes and the palladium-copper catchment gauzes, together with impurities arising from the reactor constructional materials. The results indicate two different transport mechanisms, and the study may assist in the development of more stable platinum-based catalysts and catchment packages for nitric acid plants.

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18

SAHA, Pritam, Subhrangsu Taran, and Koushik Mukherjee. "Zinc Aluminate (ZnAl₂O₄) Supported and Catalyzed Highly Effective Sonogashira Cross-Coupling and Cyclization Reaction Under Microwave Irradiation Used in One-Pot Tandem Synthesis of Furo[3,2-H]Quinolines." ECS Transactions 107, no. 1 (2022): 209–23. http://dx.doi.org/10.1149/10701.0209ecst.

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The Sonogashira reaction (SR) which forms a C–C bond by cross-coupling a vinyl/aryl halide with a terminal alkyne, uses a palladium species as a catalyst, with a copper species as co-catalysts and a phosphine/amine as ligand/base in its actual form. This efficient reaction is beneficial in synthesizing heterocycles, nanomaterials, medicines and other complex molecules with biological functions. However, in this study, we were able to successfully execute the SR under microwave irradiation, using zinc aluminate (ZnAl2O4) as the catalyst, without using palladium, phosphines/amine as a ligand/bas

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19

Kanwal, Iram, Aqsa Mujahid, Nasir Rasool, et al. "Palladium and Copper Catalyzed Sonogashira cross Coupling an Excellent Methodology for C-C Bond Formation over 17 Years: A Review." Catalysts 10, no. 4 (2020): 443. http://dx.doi.org/10.3390/catal10040443.

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Sonogashira coupling involves coupling of vinyl/aryl halides with terminal acetylenes catalyzed by transition metals, especially palladium and copper. This is a well known reaction in organic synthesis and plays a role in sp2-sp C-C bond formations. This cross coupling was used in synthesis of natural products, biologically active molecules, heterocycles, dendrimers, conjugated polymers and organic complexes. This review paper focuses on developments in the palladium and copper catalyzed Sonogashira cross coupling achieved in recent years concerning substrates, different catalyst systems and r

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20

Steinhäuser, Edith, and T. A. Magaya. "Cost-Effective Alternatives to Palladium Activation – A Study on Autocatalytic Electroless Copper Deposition." International Symposium on Microelectronics 2010, no. 1 (2010): 000861–66. http://dx.doi.org/10.4071/isom-2010-tha3-paper6.

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Electroless copper plating is the most important and critical step for through-hole metallization of printed circuit boards. Conventional electroless copper solutions contain formaldehyde as the standard reducing agent. Due to the toxic nature of formaldehyde, there is a need to change to a reducing agent that is more environmentally friendly and safer to use. Many reducing compounds have been proposed to replace formaldehyde. For example, glyoxylic acid has been described in the literature as an especially attractive alternative because of its relative safety. In preparation for electroless c

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Camacho, Ana Silvia, Iris Martín-García, Claudia Contreras-Celedón, Luis Chacón-García, and Francisco Alonso. "DNA-supported palladium nanoparticles as a reusable catalyst for the copper- and ligand-free Sonogashira reaction." Catalysis Science & Technology 7, no. 11 (2017): 2262–73. http://dx.doi.org/10.1039/c7cy00001d.

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Palladium nanoparticles on DNA have been shown to be an effective and reusable heterogeneous catalyst for the copper- and ligand-free Sonogashira coupling reaction of aryl iodides under mild conditions in air.

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Kuchkina, Nina V., Svetlana A. Sorokina, Alexey V. Bykov, Mikhail G. Sulman, Lyudmila M. Bronstein, and Zinaida B. Shifrina. "Magnetically Recoverable Nanoparticulate Catalysts for Cross-Coupling Reactions: The Dendritic Support Influences the Catalytic Performance." Nanomaterials 11, no. 12 (2021): 3345. http://dx.doi.org/10.3390/nano11123345.

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Carbon-carbon cross-coupling reactions are among the most important synthetic tools for the preparation of pharmaceuticals and bioactive compounds. However, these reactions are normally carried out using copper, phosphines, and/or amines, which are poisonous for pharmaceuticals. The use of nanocomposite catalysts holds promise for facilitating these reactions and making them more environmentally friendly. In the present work, the PEGylated (PEG stands for poly(ethylene glycol) pyridylphenylene dendrons immobilized on silica loaded with magnetic nanoparticles have been successfully employed for

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23

Jin, Bo, Fabrice Gallou, John Reilly, and Bruce H. Lipshutz. "ppm Pd-catalyzed, Cu-free Sonogashira couplings in water using commercially available catalyst precursors." Chemical Science 10, no. 12 (2019): 3481–85. http://dx.doi.org/10.1039/c8sc05618h.

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A new catalyst that derives from commercially available precursors for copper-free, Pd-catalyzed Sonogashira reactions at the sustainable ppm level of precious metal palladium under mild aqueous micellar conditions has been developed.

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Elazab, Hany A., M. A. Radwan, and Tamer T. El-Idreesy. "Facile Microwave-Assisted Synthetic Approach to Palladium Nanoparticles Supported on Copper Oxide as an Efficient Catalyst for Heck and Sonogashira Cross-Coupling Reactions." International Journal of Nanoscience 18, no. 05 (2019): 1850032. http://dx.doi.org/10.1142/s0219581x18500321.

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A simple green one-step method for the synthesis of highly active palladium nanoparticles embedded on copper oxide as an efficient catalyst for ligand-free Heck and Sonogashira cross-coupling reactions has been developed. The synthetic approach is based on Microwave (MW)-assisted simultaneous chemical reduction of an aqueous solution of palladium and copper salts using hydrazine hydrate as the reducing agent. Selected characterization of the catalyst with transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction spectroscopy (XRD) reveal a size range

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Shukla, Satyajit, and Sudipta Seal. "Electroless Copper Coating of Zirconia Utilizing Palladium Catalyst." Journal of the American Ceramic Society 86, no. 2 (2003): 279–85. http://dx.doi.org/10.1111/j.1151-2916.2003.tb00012.x.

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Yakoumis, Iakovos. "PROMETHEUS: A Copper-Based Polymetallic Catalyst for Automotive Applications. Part I: Synthesis and Characterization." Materials 14, no. 3 (2021): 622. http://dx.doi.org/10.3390/ma14030622.

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According to the strict European exhaust emissions standards that have been imposed by European legislation there is an elevated need for the decrease of the toxic gas emissions from vehicles. Therefore, car manufacturers have implemented a series of catalytic devices in the aftertreatment of the engine to comply with the standards. All catalytic devices (such as three-way catalysts, diesel particulate filters and diesel oxidation catalysts) accumulate concentrated loading of platinum group metals (PGMs, platinum, palladium, rhodium) as the active catalytic phase. Thus, the demand for PGMs is

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Mastalir, Ágnes, and Árpád Molnár. "A Novel Insight into the Ullmann Homocoupling Reactions Performed in Heterogeneous Catalytic Systems." Molecules 28, no. 4 (2023): 1769. http://dx.doi.org/10.3390/molecules28041769.

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The Ullmann reaction has been reported to be the first cross-coupling reaction performed by using a transition metal catalyst. This reaction has been initially considered as the copper-catalyzed homocoupling of aryl halides, leading to the formation of symmetrical biaryl compounds via the generation of novel C–C bonds. Although this reaction has been extensively studied in recent decades and valuable results have been achieved, there are still considerable efforts focused on the development of novel catalytic systems, mild reaction conditions, and extended substrate scope. The mechanistic aspe

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Jo, Yu-Jeong, Seung-Woo Park, Ueon Sang Shin, and Seung-Hoi Kim. "Copper Catalysts Anchored on Cysteine-Functionalized Polydopamine-Coated Magnetite Particles: A Versatile Platform for Enhanced Coupling Reactions." Molecules 29, no. 21 (2024): 5121. http://dx.doi.org/10.3390/molecules29215121.

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Cysteine plays a crucial role in the development of an efficient copper-catalyst system, where its thiol group serves as a strong anchoring site for metal coordination. By immobilizing copper onto cysteine-modified, polydopamine-coated magnetite particles, this advanced catalytic platform exhibits exceptional stability and catalytic activity. Chemical modification of the polydopamine (PDA) surface with cysteine enhances copper salt immobilization, leading to the formation of the Fe3O4@PDA-Cys@Cu platform. This system was evaluated in palladium-free, copper-catalyzed Sonogashira coupling reacti

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Samad, Wan Zurina, Wan Nor Roslam Wan Isahak, Noraini Hamzah, Mohd Ambar Yarmo, and Muhammad Rahimi Yusop. "Effect of Metals Compatibility on Fluorine-Doped Tin Oxide Catalyst for Glycerol Conversion to 1,2-Propanediol." Materials Science Forum 888 (March 2017): 496–502. http://dx.doi.org/10.4028/www.scientific.net/msf.888.496.

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The effect of metals on support material fluorine-doped tin oxide (FTO), were studied. A series of metals such as ruthenium (Ru), osmium (Os), palladium (Pd), and copper (Cu) on FTO support were prepared by a simple wet mixture method, and attempted as a heterogeneous catalyst to enhance the hydrogenolysis of glycerol converted to 1,2-propanediol (1,2-PDO). The physicochemical properties of the catalysts were characterized by XRD, XPS, BET, FESEM, TEM, TPR, and TPD techniques. In particular, the catalyst of Ru-FTO was recorded as a good catalyst with an optimum glycerol conversion of 100% and

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Gao, Wen Liang, and Fang Li. "Catalytic Hydrogenation of Nitrate Ions over Pd-Cu/ZSM-5 Catalyst." Advanced Materials Research 197-198 (February 2011): 967–71. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.967.

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Palladium-copper bimetallic catalysts supported over different supporters were prepared by chemical reduction method, and their catalytic performance was investigated with the hydrogenation of nitrate ions in drinking water under mild conditions. The results show that Pd-Cu/ZSM-5 bimetallic catalyst has the highest catalytic activity among all used catalysts. In addition, nitrate conversion influenced by metal content, metal molar ratio (Pd:Cu) and the addition of CO2 are also discussed. It is well established that the addition of CO2 has changed the reduction path of the intermediate nitrite,

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Kiose, T. O., and T. L. Rakytska. "PREPARATION AND PROTECTIVE PROPERTIES OF A CATALYST FOR THE OXIDATION OF CARBON MONOXIDE BY AIR OXYGEN BASED ON Pd(II), Cu(II) COMPOUNDS AND CARBON FIBER MATERIAL." Odesa National University Herald. Chemistry 29, no. 2(88) (2024): 15–28. https://doi.org/10.18524/2304-0947.2024.2(88).322126.

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Ensuring reliable protection of the respiratory organs of the workers in various industries from carbon monoxide is a complex and multifaceted task. In order to solve a number of issues, it is necessary to carry out research aimed at the development of appropriate catalysts, their optimization, and, taking into account the operational characteristics of catalysts, develop recommendations for their use in the means of individual protection of respiratory organs. The work is devoted to the synthesis method optimization and the operational characteristics determination of the catalyst for the oxi

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Bulanova, Andzhela Vladimirovna, Roman Vladimirovich Shafigulin, Kirill Yurievich Vinogradov, et al. "Effect of Modifying Carbon Materials with Metal Phthalocynines and Palladium on Their Catalytic Activity in ORR." Catalysts 12, no. 9 (2022): 1013. http://dx.doi.org/10.3390/catal12091013.

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Bimetallic catalysts based on multi-walled carbon nanotubes (MWCNT), graphene oxide (GO) and ultradispersed diamonds (UDD) supports for the process of electroreduction of oxygen from alkaline electrolyte were obtained using high-temperature synthesis. The materials were characterized by low-temperature nitrogen adsorption, Raman spectroscopy, scanning electron microscopy and X-ray structure analysis. The synthesized bimetallic catalysts contain meso- and micropores. Based on the study by Raman spectroscopy, it is shown that high-temperature synthesis of MWCNT with metal phthalocyanines leads t

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SATTAROV, KK. "HYDROGENATION TECHNOLOGY AND CHEMISTRY OF COTTONSEED OIL AND FATS." SABRAO Journal of Breeding and Genetics 55, no. 3 (2023): 965–71. http://dx.doi.org/10.54910/sabrao2023.55.3.30.

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The presented research describes the hydrogenation technology and the chemistry of vegetable oils and fats using powder and stationary catalysts. The hydrogenation technology process includes various equipment and materials, i.e., equipment for hydrogenation, laboratory flow reactor, autoclave for hydrogenation on powder nickel-copper catalyst, hydrogenation catalysts, and selection of alloy stationary catalysts and their structure. The hydrogenation process includes selecting alloy nickelaluminum catalyst promoters, measuring the viscosity of hydrogenated fat, using static catalysts as forcon

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KROPACHEVA, T. N., and I. L. SAVELJEV. "PREPARATION OF PALLADIUM-CHITOSAN HYDROSOL AND ITS CATALYTIC ACTIVITY IN COPPER PRECIPITATION REACTION." Herald of Technological University 28, no. 5 (2025): 15–19. https://doi.org/10.55421/3034-4689_2025_28_5_15.

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The results of a study of a new method for obtaining a colloidal solution containing metallic palladium nanoparticles are presented. Pd(II) ions were reduced from a H2PdCl4solution at room temperature in the presence of chitosan biopolymer (C₆H₁₁O₄N)n (n ≈3100, degree of deacylation 90%) using sodium hypophosphite NaH₂PO₂. The process was monitored using spectrophotometry for the formation of a broad plasmon resonance band of metallic palladium nanoparticles. Optimum conditions for rapid (5-10 min) formation of stable hydrosol were achieved at the ratio Pd: C₆H₁₁O₄N = 1:90 and excess of reduci

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Semler, Miloslav, Filip Horký, and Petr Štěpnička. "Synthesis of Alkynyl Ketones by Sonogashira Cross-Coupling of Acyl Chlorides with Terminal Alkynes Mediated by Palladium Catalysts Deposited over Donor-Functionalized Silica Gel." Catalysts 10, no. 10 (2020): 1186. http://dx.doi.org/10.3390/catal10101186.

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Palladium catalysts deposited over silica gel bearing simple amine (≡Si(CH2)3NH2) and composite functional amide pendants equipped with various donor groups in the terminal position (≡Si(CH2)3NHC(O)CH2Y, Y = SMe, NMe2 and PPh2) were prepared and evaluated in Sonogashira-type cross-coupling of acyl chlorides with terminal alkynes to give 1,3-disubstituted prop-2-yn-1-ones. Generally, the catalysts showed good catalytic activity in the reactions of aroyl chlorides with aryl alkynes under relatively mild reaction conditions even without adding a copper co-catalyst. However, their repeated use was

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36

Nikolaev, S. A., D. I. Ezzhelenko, A. V. Chistyakov, P. A. Chistyakova, and M. V. Tsodikov. "Influence of Synthesis Conditions on the Performance of Palladium–Copper Ethanol-to-Butanol Conversion Catalysts." Нефтехимия 63, no. 4 (2023): 566–81. http://dx.doi.org/10.31857/s0028242123040111.

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The influence of the synthesis conditions on the performance of Pd–Cu ethanol-to-butanol conversion catalysts was studied. The optimum conditions for forming the most active system 0.2%Cu/0.3%Pd/Al2O3 are as follows: sample synthesis by Al2O3 impregnation from aqueous solutions of Pd and Cu nitrates; deposition of the metal precursors in succession; total content of Pd and Cu in the sample 0.5 wt %; Pd : Сu molar ratio 1 : 1; catalyst reduction temperature 200○С. As shown by TEM, XPS, TPD-NH3, TPR-H2, XRD, and N2 adsorption, the surface of the most active catalyst contains Pd0Cu0 particles wit

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37

Yang, Pei-Qing, and Tzu Chien Wei. "Synthesis of Aptes-Capped Self-Adsorption Pd Nanoparticles and Application in Metallization on Glass Substrate with High Adhesion." ECS Meeting Abstracts MA2023-02, no. 20 (2023): 1241. http://dx.doi.org/10.1149/ma2023-02201241mtgabs.

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Palladium is the most used catalysts in the electroless deposition process. The technology that use the amino silane compound (3-Aminopropyl) Triethoxysilane (APTES) as surface modifier is quite mature. Therefore, an innovative idea that one step palladium catalyst APTES-Pd with APTES as capping agent and surface modifier appeared. APTES-Pd is capable to adsorb on surface of glass substrate by forming Si-O covalent bond. Comparing to commercial palladium catalysts, the process is complex and need to work at high concentration, APTES-Pd has easier process and able to work at low concentration.

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Lyu, Yuan-Ping, Yu-Min Lin, and Chien-Liang Lee. "Palladium/copper concave nanocube as an oxygen reduction catalyst." Journal of Electroanalytical Chemistry 847 (August 2019): 113247. http://dx.doi.org/10.1016/j.jelechem.2019.113247.

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39

Mohiuddin, A. K. M., and Ataur Rahman. "Investigation Using Simulations for the Development of Low Cost Catalytic Converter from Non-Precious Metals." Advanced Materials Research 445 (January 2012): 899–904. http://dx.doi.org/10.4028/www.scientific.net/amr.445.899.

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This paper discusses the uses of non-precious metals in catalytic converters to bring down the cost without sacrificing the performance capability. Copper powder and nickel catalyst were chosen as the alternative catalysts to reduce the use of precious group metals (PGMs) platinum, palladium, and rhodium. Simulation by COMSOL has shown that Nickel and copper were very effective in reducing NOx during rich condition of air-fuel mixture while oxidizing CO and HC during lean condition. Simulations using FLUENT and COMSOL have shown the actual characteristics of the catalytic converter performance

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40

Khaminets, S. G., S. V. Matveichuk, and L. Yu Tychinskaya. "Effect of water content and storage conditions on the activity of PdCuFe-containing fibrous carbon catalyst for low-temperature CO oxidation." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 59, no. 1 (2023): 7–17. http://dx.doi.org/10.29235/1561-8331-2023-59-1-7-17.

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Effect of water content and storage conditions on the activity of carbon fiber supported palladium-copper-iron containing catalyst was studied. Physical-chemical properties of catalytic system were examined by means of XRD, XPS, SEM and GCh. The optimal water content in the catalyst, which ensures the most effective air purification both at low (0,03 vol.%) and high (0,5 vol.%) CO concentrations in the air and high humidity (70 %) of gas mixture, was determined.Activity loss of the catalytic system after storage under air conditions (1 month) was attributed to the accumulation of the excess am

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41

Tamami, Bahman, and Soheila Ghasemi. "Copper- and amine-free Sonogashira–Hagihara coupling reaction catalyzed by Pd(0) nanoparticles supported on modified crosslinked polyacrylamide." Collection of Czechoslovak Chemical Communications 76, no. 12 (2011): 1967–78. http://dx.doi.org/10.1135/cccc2011168.

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Pd(0) nanoparticles supported on modified crosslinked polyacrylamide containing phosphinite ligand was prepared. The complex was a highly efficient catalyst for the Sonogashira– Hagihara coupling reaction in the absence of a copper cocatalyst and an amine base under aerobic condition. This protocol can be applied for different aryl halides including chloroarenes. The catalyst can be reused several times without any considerable decrease in its activity because of low leaching of palladium metal from the support. Transmission electron microscopy (TEM) analysis of the catalyst revealed the forma

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Kotora, Martin, and Milan Hájek. "Addition of Tetrachloromethane to 1,5-Hexadiene." Collection of Czechoslovak Chemical Communications 57, no. 2 (1992): 393–96. http://dx.doi.org/10.1135/cccc19920393.

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The 2 : 1 adduct as the final product of the addition of tetrachloromethane to 1,5-hexadiene catalyzed by copper(I)-butylamine complex was obtained in high yield (96%) under mild reaction conditions. Predominant 1 : 1 adduct formation was observed in the presence of a palladium catalyst or dibenzoyl peroxide initiator.

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Buronov, Firdavsiy, and Normurot Fayzullayev. "OPTIMIZATION OF VINYL ACETATE PRODUCTION PROCESS." ГРААЛЬ НАУКИ, no. 4 (May 14, 2021): 187–91. http://dx.doi.org/10.36074/grail-of-science.07.05.2021.035.

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In the article, the kinetic laws and kinetics and mechanism of the oxidation acetylationreaction of ethylene in the vapour phase were studied in detail in a catalyst containing0,4%Рd+4%Cu+7%CH3COOK/HSZ. It was found that the total rate of the reaction was proportionalto the amount of unmodified and modified active sites of palladium (not clusters). Excess amountsof the modifier (both potassium acetate and copper) have been shown to block active sites byreducing catalyst efficiency.

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44

Petriev, Iliya, Polina Pushankina, Yuliya Glazkova, Georgy Andreev, and Mikhail Baryshev. "Investigation of the Dependence of Electrocatalytic Activity of Copper and Palladium Nanoparticles on Morphology and Shape Formation." Coatings 13, no. 3 (2023): 621. http://dx.doi.org/10.3390/coatings13030621.

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A synthesis strategy for the manufacture of inexpensive highly efficient nanostructured catalysts has been developed. The developed unique nonplatinoid copper-based catalysts with different surface morphology were investigated as a functional layer with high activity in the ethanol oxidation in alkaline media. A modifying layer with controlled morphology, composition, and excellent electrocatalytic activity was synthesized by electrochemical deposition by varying such synthesis parameters as deposition temperature and time, concentration of structure-forming additives, and electrodeposition cu

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45

Zhan, Fangke, Juanjuan Yin, Jingxin Zhou, et al. "Facile Preparation and Highly Efficient Catalytic Performances of Pd-Cu Bimetallic Catalyst Synthesized via Seed-Mediated Method." Nanomaterials 10, no. 1 (2019): 6. http://dx.doi.org/10.3390/nano10010006.

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With the rapid development of industry, the problem of environmental pollution has become increasingly prominent. Exploring and preparing green, efficient, and low cost catalysts has become the key challenge for scientists. However, some conventional preparation methods are limited by conditions, such as cumbersome operation, high energy consumption, and high pollution. Here, a simple and efficient seed-mediated method was designed and proposed to synthesize a highly efficient bimetallic catalyst for catalyzing nitro compounds. A Pd-Cu bimetallic composite (BCM) can be prepared by synthesizing

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46

Сальникова, Ксения Евгеньевна, Валентина Геннадьевна Матвеева, Алексей Владимирович Быков, Александр Иванович Сидоров, and Михаил Геннадьевич Сульман. "STUDY OF THE CATALYTIC CHARACTERISTICS OF Pd-Cu ALLOY NANOPARTICLES IN A POROUS POLYMER USING SELECTIVE HYDROGENATION OF FURFUROL PRODUCED FROM BIOMASS." Вестник Тверского государственного университета. Серия: Химия, no. 1(47) (April 5, 2022): 37–42. http://dx.doi.org/10.26456/vtchem2022.1.3.

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Была исследована разработка нового катализатора для селективного гидрирования фурфурола до фурфурилового спирта на основе наночастиц сплава Pd-Cu размером около 7 нм, сформированных в недорогом, коммерчески доступном микро/мезопористом сверхсшитом полистироле. Сравнение каталитических свойств синтезированных и восстановленных (обозначенных «r») катализаторов, а также наночастиц сплава Pd-Cu и монометаллического палладия показало значительное повышение каталитических характеристик Pd-Cu/HPS-r по сравнению с другими исследованными катализаторами, что привели к конверсии фурфурола примерно 100% и

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47

Kustov, A. L., S. F. Dunaev, and T. Salmi. "Selective Hydrogenation of Pyridine and Derivatives of It on Bimetallic Catalysts." Russian Journal of Physical Chemistry A 96, no. 10 (2022): 2129–32. http://dx.doi.org/10.1134/s0036024422100132.

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Abstract A study is performed of the catalytic properties of bimetallic nanoparticles based on palladium and a base metal (silver or copper) in the selective hydrogenation of pyridine and derivatives of it with the formation of piperidine and derivatives of it. It is established that the effect of increasing the activity of bimetallic nanoparticles is associated with the small size of particles (2–3 nm), relative to monometallic palladium catalyst. The conversion of pyridine reaches 99% with a piperidine selectivity of 99% under mild conditions (60°C, pressure H2 = 70 atm).

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48

Pascu, Alexandru, Elena Manuela Stanciu, Cătălin Croitoru, Ionut Claudiu Roată, and Mircea Horia Tierean. "Carbon Nanoparticle-Supported Pd Obtained by Solar Physical Vapor Deposition." Advances in Materials Science and Engineering 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/4730192.

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Palladium supported on carbon nanoparticles has been obtained on a specially designed ceramic catalyst, obtained by thermal spraying on a copper substrate, starting from Pd/C targets. Solar physical vapor deposition in argon, an environment-friendly and energy-efficient alternative to arc or chemical vapor deposition, has been employed as a means of target vaporization at CNRS-PROMES facility in Odeillo, France. The obtained nanoparticles have a spherical-porous morphology with diameters ranging from 50 to 120 nm and specific sorption areas of 50,000 m2/g. The XRD diffractograms indicate the p

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49

Sabarudin, Akhmad, Shin Shu, Kazuhiro Yamamoto, and Tomonari Umemura. "Preparation of Metal-Immobilized Methacrylate-Based Monolithic Columns for Flow-Through Cross-Coupling Reactions." Molecules 26, no. 23 (2021): 7346. http://dx.doi.org/10.3390/molecules26237346.

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With the aim of developing efficient flow-through microreactors for high-throughput organic synthesis, in this work, microreactors were fabricated by chemically immobilizing palladium-, nickel-, iron-, and copper-based catalysts onto ligand-modified poly(glycidyl methacrylate-co-ethylene dimethacrylate) [poly(GMA-co-EDMA)] monoliths, which were prepared inside a silicosteel tubing (10 cm long with an inner diameter of 1.0 mm) and modified with several ligands including 5-amino-1,10-phenanthroline (APHEN), iminodiacetic acid (IDA), and iminodimethyl phosphonic acid (IDP). The performance of the

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50

Santos, A. Sofia G. G., João Restivo, Carla A. Orge, M. Fernando R. Pereira, and O. Salomé G. P. Soares. "Nitrate Catalytic Reduction over Bimetallic Catalysts: Catalyst Optimization." C 6, no. 4 (2020): 78. http://dx.doi.org/10.3390/c6040078.

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The catalytic removal of nitrate (NO3−) in water using hydrogen as a reducing agent was studied using palladium-copper bimetallic catalysts in different supports. Commercial carbon nanotubes (CNTs), used as received and with different mechanical (CNT (BM 2h)) and chemical modifications (CNT (BM 4h)-N), titanium dioxide (TiO2) and composite materials (TiO2-CNT) were considered as main supports for the metallic phase. Different metal loadings were studied to synthesize an optimized catalyst with high NO3− conversion rate and considerable selectivity for N2 formation. Among all the studied suppor

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