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Journal articles on the topic 'Gold. Catalysts. Oxidation'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Edwards, Jennifer, Philip Landon, Albert F. Carley, et al. "Nanocrystalline gold and gold–palladium as effective catalysts for selective oxidation." Journal of Materials Research 22, no. 4 (2007): 831–37. http://dx.doi.org/10.1557/jmr.2007.0117.

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The recent interest in oxidation catalysis provides the focus for this article. Until recently, gold has been overlooked as a key component of both homogeneous and heterogeneous catalysts. However, the observation in the 1980s that nanocrystalline gold supported on oxides was an effective catalyst for low-temperature carbon monoxide oxidation has now captured the imagination of many researchers. At present, low-temperature carbon monoxide oxidation remains an intensely studied field, but in recent years increased emphasis has been placed on using gold catalysts for selective oxidation. For exa

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2

Saha, Subrata, Md Eaqub Ali, Azman Maamor, and Wan Jeffery Basirun. "Design and Synthesis of Silica Supported Nanoporous Gold-Palladium Bimetallic Catalyst for Alkyl Benzene Oxidation." Advanced Materials Research 1109 (June 2015): 444–47. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.444.

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Gold palladium (Au-Pd) bimetallic catalysts are very promising for various reactions including oxidative catalysis. Mesoporous silica supported Au-Pd catalysts have large surface area, controlled hydrophobi and file-cities and are thus highly efficient for the oxidation of alkyl benzene to selective products. Alkyl Benzene oxidation is important for the productions of drugs, perfumes, polymers, insecticides and pesticides. Unfortunately, the efficient oxidation of alkyl benzene has been remaining a challenging task due to lack of suitable catalysts. Functionalized mesoporous silica with ordere

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3

Dong, Feng, Yuan Guo, Dongyang Zhang, Baolin Zhu, Weiping Huang, and Shoumin Zhang. "Gold Nanoparticles Supported on Urchin-Like CuO: Synthesis, Characterization, and Their Catalytic Performance for CO Oxidation." Nanomaterials 10, no. 1 (2019): 67. http://dx.doi.org/10.3390/nano10010067.

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Gold catalysts have been studied in-depth due to their unique activities for catalytic CO oxidation. Supports have intrinsic motivation for the high activity of gold catalysts. Thermally stable urchin-like CuO microspheres, which are potential support for gold catalysts, were prepared by facile solution-method. Then gold nanoparticles were loaded on them by deposition-precipitation method. The obtained gold catalysts were characterized by SEM, XRD, TEM, BET, ICP, and XPS. Their catalytic activity for CO oxidation was also evaluated. TEM results revealed that the gold nanoparticles with small s

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4

Dobrosz-Gómez, Izabela, Miguel-Ángel Gómez-García, and Jacek Michał Rynkowski. "The Origin of Au/Ce1-xZrxO2 Catalyst’s Active Sites in Low-Temperature CO Oxidation." Catalysts 10, no. 11 (2020): 1312. http://dx.doi.org/10.3390/catal10111312.

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Gold catalysts have found applications in many reactions of both industrial and environmental importance. Great interest has been paid to the development of new processes that reduce energy consumption and minimize pollution. Among these reactions, the catalytic oxidation of carbon monoxide (CO) is an important one, considering that a high concentration of CO in the atmosphere creates serious health and environmental problems. This paper examines the most important achievements and conclusions arising from the own authorship contributions concerning (2 wt. % Au)/Ce1−xZrxO2 catalyst’s active si

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5

Cabral Almada, Cédric, Aleksandr Kazachenko, Pascal Fongarland, Denilson Da Silva Perez, Boris N. Kuznetsov, and Laurent Djakovitch. "Supported-Metal Catalysts in Upgrading Lignin to Aromatics by Oxidative Depolymerization." Catalysts 11, no. 4 (2021): 467. http://dx.doi.org/10.3390/catal11040467.

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Supported gold and platinum particles on titanium oxide catalysts were evaluated in the oxidative depolymerization of lignins toward high added value aromatics under mild conditions (T: 150 °C, Pair: 20 bar, CNaOH: 10 g/L, 1 h). Kraft and ethanol Organosolv lignins were engaged in the study. Gold catalyst showed a strong tendency to further oxidize aromatics produced from lignin depolymerization to volatile compounds leading to very low yield in target molecules. On the contrary, platinum-based catalysts were allowed to observe enhanced yields that were attributed to its ability to preserve li

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6

Wang, Peng, and Lin Hua Zhu. "Preparation of Layered Double Hydroxide (LDHs)-Supported Gold Catalysts and its Activity and Stability for Low-Temperature CO Oxidation." Advanced Materials Research 396-398 (November 2011): 841–47. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.841.

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A new type of gold catalysts have been prepared by supporting gold colloids on layered double hydroxide (MgAl-LDHs) carrier at different pH values. CO oxidation reaction at room temperature was used as probe reaction to test the oxidation activity of the gold catalysts, and X-ray diffraction (XRD), X-ray fluorescence (XRF) and high resolution transmission election microscopy (HRTEM) techniques were used to characterize the physical phase, gold loading, morphology as well as mean diameter of gold particles and particle distribution of the represented gold catalyst samples. Influence of pH value

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7

Ahn, Ho-Geun, Byoung-Min Choi, and Do-Jin Lee. "Complete Oxidation of Ethylene over Supported Gold Nanoparticle Catalysts." Journal of Nanoscience and Nanotechnology 6, no. 11 (2006): 3599–603. http://dx.doi.org/10.1166/jnn.2006.17990.

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Complete oxidation of ethylene was performed over supported noble metals or transition metals oxide catalysts and on monoliths under atmospheric pressure. Gold nanoparticles on Al2O3 or MxOy (M = Mo, Fe, Mn) were prepared by impregnation, coprecipitation, deposition, and dispersion methods. Nanoparticles prepared by impregnation method were irregular and very large above 25 nm, but those by coprecipitation and deposition method were uniformly nanosized at 4 ∼ 5 nm. The gold nanoparticle were outstandingly active in catalyzing oxidation of ethylene. The activity order of these catalysts with pr

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8

Pakrieva, Ekaterina, Ana P. C. Ribeiro, Ekaterina Kolobova, et al. "Supported Gold Nanoparticles as Catalysts in Peroxidative and Aerobic Oxidation of 1-Phenylethanol under Mild Conditions." Nanomaterials 10, no. 1 (2020): 151. http://dx.doi.org/10.3390/nano10010151.

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The efficiency of Au/TiO2 based catalysts in 1-phenylethanol oxidation was investigated. The role of support modifiers (La2O3 or CeO2), influence of gold loading (0.5% or 4%) and redox pretreatment atmosphere, catalyst recyclability, effect of oxidant: tert-butyl hydroperoxide (TBHP) or O2, as well as the optimization of experimental parameters of the reaction conditions in the oxidation of this alcohol were studied and compared with previous studies on 1-octanol oxidation. Samples were characterized by temperature-programmed oxygen desorption (O2-TPD) method. X-ray photoelectron spectroscopy

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9

Chenouf, Meriem, Cristina Megías-Sayago, Fatima Ammari, Svetlana Ivanova, Miguel Centeno, and José Odriozola. "Immobilization of Stabilized Gold Nanoparticles on Various Ceria-Based Oxides: Influence of the Protecting Agent on the Glucose Oxidation Reaction." Catalysts 9, no. 2 (2019): 125. http://dx.doi.org/10.3390/catal9020125.

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The influence of the protecting agent’s nature on gold particle size and dispersion was studied in this work over a series of gold-based catalysts. CO and glucose oxidation were chosen as catalytic reactions to determine the catalyst’s structure–activity relationship. The nature of the support appeared to be the predominant factor for the increase in activity, as the oxygen mobility was decisive for the CO oxidation in the same way that the Lewis acidity was decisive for the glucose oxidation. For the same catalyst composition, the use of montmorillonite as the stabilizing agent resulted in be

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10

Xu, Li Xin, Chuan Feng Sun, Jie Li, and Guang Yuan Chen. "Gold Catalysts on TiO₂-Modified Silica Gel for the Selective Cyclopentane Oxidation to Cyclopentanone." Advanced Materials Research 1094 (March 2015): 76–81. http://dx.doi.org/10.4028/www.scientific.net/amr.1094.76.

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Amorphous silica gel was modified by titania via an impregnation-surface hydrolysis approach and used as the support for preparing gold catalysts through an direct anion exchange method. These supported gold catalysts were characterized by XRD and TEM, and applied for the catalytic cyclopentane oxidation to cyclopentanone using oxygen in the absence of any solvent and initiator. The catalyst with a loading of 0.1wt.% gold and 10wt.% TiO2 exhibited 7.2% cyclopentane conversion and 77.4% selectivities (including cyclopentanone and cyclopentanol) under the reaction conditions of 145°C, 2.0 MPa an

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11

Alshammari, Hamed. "Synthesis of Carboxylic Acid by 2-Hexenal Oxidation Using Gold Catalysts Supported on MnO2." Journal of Chemistry 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/2016407.

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Synthesis of carboxylic acid can be achieved by the oxidation of aldehyde using air as an oxidant in the presence of a potential catalyst. We demonstrated that 2-hexenal can be oxidized to carboxylic acid by Au, Pd, and Au-Pd catalysts and investigated the effects of catalyst support (graphite, TiO2, MgO, SiC, MnO2, CeO2, and Al2O3), preparation method for supported catalyst (sol immobilization, impregnation, and deposition precipitation), and choice of catalyst components. Analysis of conversion% and selectivity% for 2-hexenoic acid showed that MnO2-supported gold nanoparticles are the best c

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12

Ali, Md Eaqub, Md Motiar Rahman, and Sharifah Bee Abd Hamid. "Nanoclustered Gold: A Promising Green Catalysts for the Oxidation of Alkyl Substituted Benzenes." Advanced Materials Research 925 (April 2014): 38–42. http://dx.doi.org/10.4028/www.scientific.net/amr.925.38.

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Catalytic oxidation of alkyl substituted benzenes is an essential route for the synthesis of a number of important chemicals, perfumes, drugs and pharmaceuticals. The oxidation products of ethyl benzene are important precursors for a wide range of pharmaceuticals and synthetic materials. Acetophenone and 1-phenylethanol are two oxidation products of ethyl benzene which are the precursors of optically active alcohol, benzalacetophanones, hydrazones and so on. However, the oxidations of alkyl substituted benzenes have been remaining a challenging task. This is because of the limitations of an ap

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13

Saipanya, Surin, Somchai Lapanantnoppakhun, and Thapanee Sarakonsri. "Electrochemical Deposition of Platinum and Palladium on Gold Nanoparticles Loaded Carbon Nanotube Support for Oxidation Reactions in Fuel Cell." Journal of Chemistry 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/104514.

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Pt and Pd sequentially electrodeposited Au nanoparticles loaded carbon nanotube (Au-CNT) was prepared for the electrocatalytic study of methanol, ethanol, and formic acid oxidations. All electrochemical measurements were carried out in a three-electrode cell. A platinum wire and Ag/AgCl were used as auxiliary and reference electrodes, respectively. Suspension of the Au-CNT, phosphate buffer, isopropanol, and Nafion was mixed and dropped on glassy carbon as a working electrode. By sequential deposition method, PdPtPt/Au-CNT, PtPdPd/Au-CNT, and PtPdPt/Au-CNT catalysts were prepared. Cyclic volta

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14

Ko, Eun Yong, Eun Duck Park, Hyun Chul Lee, Doo Hwan Lee, and Soon Ho Kim. "Nano-Sized Au/CeO₂ Catalysts for Total and Selective CO Oxidation." Solid State Phenomena 124-126 (June 2007): 1749–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.1749.

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Au/CeO2 catalysts prepared by a deposition-precipitation and a co-precipitation method were applied to CO oxidation in the absence and presence of hydrogen. The transmission electron microscope (TEM), the temperature programmed reduction (TPR), and the X-ray absorption near edge structure (XANES) were conducted to probe structural and electronic properties of gold. Au2O3 was determined to be mainly present when Au/CeO2 was prepared by a deposition-precipitation method. However, the metallic gold was observed in a co-precipitated Au/CeO2 catalyst. Au/CeO2 containing oxidized gold species, prepa

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15

REDDY, E. LINGA, A. PRABHAKARN, J. KARUPPIAH, N. RAMESHBABU, and CH SUBRAHMANYAM. "GOLD SUPPORTED CALCIUM DEFICIENT HYDROXYAPATITE FOR ROOM TEMPERATURE CO OXIDATION." International Journal of Nanoscience 11, no. 03 (2012): 1240004. http://dx.doi.org/10.1142/s0219581x12400042.

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Gold supported hydroxyapatite (HA) and calcium deficient hydroxyapatite (CDHA) was studied for the room temperature CO oxidation. Nanostructured gold catalyst has been prepared by deposition precipitation method, whereas HA was synthesized by microwave synthesis. Inorder to understand the influence of surface properties of HA, support HA was synthesized with different Ca/P ratios (1.67, 1.62, 1.57, 1.534 and 1.5). The gold supported catalysts were characterized by XRD, BET, ICP-OES and TEM. Typical results indicate that gold supported 1.57 HA shows higher activity compared to other HA catalyst

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16

Ameur, Nawel, Amina Berrichi, Sumeya Bedrane, and Redouane Bachir. "Preparation and Characterization of Au/Al₂O₃ and Au-Fe/Al₂O₃ Materials, Active and Selective Catalysts in Oxidation of Cyclohexene." Advanced Materials Research 856 (December 2013): 48–52. http://dx.doi.org/10.4028/www.scientific.net/amr.856.48.

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Monometallic gold and bimetallic gold-iron catalysts supported on alumina were prepared in order to check their activity and selectivity in the reaction of cyclohexene oxidation. Au/Al2O3was prepared by a deposition precipitation with urea (DPU) method, while the bimetallic catalyst Au-Fe/Al2O3was prepared by under potential deposition (UPD). The characterization by ICP and EDS showed that very small amount of iron are deposited near gold nanoparticles. However, TEM images showed that the deposition method of iron induced gold nanoparticles sintering. All catalysts were tested in the reaction

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17

Zhang, Jingsen, Lanbo Di, Feng Yu, Dongzhi Duan, and Xiuling Zhang. "Atmospheric-Pressure Cold Plasma Activating Au/P25 for CO Oxidation: Effect of Working Gas." Nanomaterials 8, no. 9 (2018): 742. http://dx.doi.org/10.3390/nano8090742.

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Commercial TiO2 (P25) supported gold (Au/P25) attracts increasing attention. In this work, atmospheric-pressure (AP) cold plasma was employed to activate the Au/P25-As catalyst prepared by a modified impregnation method. The influence of cold plasma working gas (oxygen, argon, hydrogen, and air) on the structure and performance of the obtained Au/P25 catalysts was investigated. X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), and X-ray spectroscopy (XPS) were adopted to characterize the Au/P25 catalysts. CO oxidation was used as mo

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18

Gaálová, Jana, and Pavel Topka. "Gold and Ceria as Catalysts for VOC Abatement: A Review." Catalysts 11, no. 7 (2021): 789. http://dx.doi.org/10.3390/catal11070789.

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Due to its excellent oxygen storage capacity, ceria is a well-known oxidation catalyst. However, its performance in the oxidation of volatile organic compounds can be improved by the introduction of gold. Depending on the type of VOC to be oxidized, the surface of gold nanoparticles and the gold/ceria interface may contribute to enhanced activity and/or selectivity. Choosing a proper preparation method is crucial to obtain optimal gold particle size. Deposition–precipitation was found to be more suitable than coprecipitation or impregnation. For industrial applications, monolithic catalysts ar

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19

Villa, Alberto, Nikolaos Dimitratos, Carine E. Chan-Thaw, Ceri Hammond, Laura Prati, and Graham J. Hutchings. "Glycerol Oxidation Using Gold-Containing Catalysts." Accounts of Chemical Research 48, no. 5 (2015): 1403–12. http://dx.doi.org/10.1021/ar500426g.

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20

RUSSO, N., D. FINO, G. SARACCO, and V. SPECCHIA. "Supported gold catalysts for CO oxidation." Catalysis Today 117, no. 1-3 (2006): 214–19. http://dx.doi.org/10.1016/j.cattod.2006.05.027.

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21

Murzina, Elena V., Anton V. Tokarev, Krisztián Kordás, Hannu Karhu, Jyri-Pekka Mikkola, and Dmitry Yu Murzin. "d-Lactose oxidation over gold catalysts." Catalysis Today 131, no. 1-4 (2008): 385–92. http://dx.doi.org/10.1016/j.cattod.2007.10.080.

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22

Rahman, Md Motiar, Md Eaqub Ali, Mst Gulshan Ara, Sharifah Bee Abd Hamid, and Md Motalib Hossain. "Synthesis of Supported Gold Nanocatalysts for the Oxidation of Alkyl Benzenes." Advanced Materials Research 1109 (June 2015): 60–63. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.60.

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Selective oxidation of alkyl benzene, to its corresponding oxygen containing products, is a crucial reaction in organic researches and industrial manufacturing. In particular, the direct oxidation of lavish and cheapest aromatics, having carbon-hydrogen bonds, into corresponding ketones are the key transformations as the oxidation products are very important platform compounds for the production of useful prime, special chemicals and high economic valued fine chemicals, agrochemicals, pharmaceutical and perfumes in large scale. However, the oxidations of aromatic hydrocarbons have been remaini

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23

Alshammari. "Heterogeneous Gold Catalysis: From Discovery to Applications." Catalysts 9, no. 5 (2019): 402. http://dx.doi.org/10.3390/catal9050402.

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In the present review, the important and current developments of gold catalysts for a wide range of applications are comprehensively summarized. This review also provides a detailed study of the literature data concerning the preparation, characterization, and catalytic applications of gold catalysts. Additionally, the main aspects of using supported gold nanoparticles (AuNPs) as catalysts for oxidation reactions are considered. In particular, the oxidation of benzyl alcohol to benzaldehyde and the production of adipic acid from cyclohexane are discussed in detail. Lastly, the key properties o

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24

Gaya, Ndepana A., Victor Charles, Innocent Joseph, and Hitler Louis. "A review on CO oxidation, methanol synthesis, and propylene epoxidation over supported gold catalysts." Catalysis for Sustainable Energy 6, no. 1 (2019): 13–37. http://dx.doi.org/10.1515/cse-2019-0003.

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Abstract The aim of this general review is to give an overview of the reaction pathways involving the transformation of carbon monoxide (CO), methanol synthesis and propylene epoxidation using gold (Au) and gold supported clusters. Over the catalyst system of Nano-gold (Au/SiO2), the process of methane to methanol was also highlighted. A reaction mechanism proposed, indicated that molecular oxygen was consumed in the oxidation–reduction cycle. Consequently, methane oxidation to methanol can be achieved as a green chemical process. The system can also be used in other green chemical processes o

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Saikia, Pranjal, Abu Taleb Miah, Banajit Malakar, and Ankur Bordoloi. "Enhanced Catalytic Activity of Supported Gold Catalysts for Oxidation of Noxious Environmental Pollutant CO." Indian Journal of Materials Science 2015 (August 27, 2015): 1–10. http://dx.doi.org/10.1155/2015/658346.

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Noble metal nanomaterials have attracted mounting research attention for applications in diverse fields of catalysis, biology, and nanotechnology. In the present study, we have undertaken a detailed investigation on synthesis, characterization, and catalytic activity studies for CO oxidation by nanogold catalysts supported over CeO2 and CeO2-ZrO2 (1 : 1 mole ratio). The support systems were prepared by modified, simple precipitation technique and the Au supported samples were synthesized using deposition-precipitation with urea method. The physicochemical characterization was performed by XRD,

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26

Wu, Hong Jing, Qin Shuai, Zhen Li Zhu, and Sheng Hong Hu. "Complete Benzene Oxidation over Colloidal Gold Catalysts Supported on Nanostructure Zinc Oxide." Advanced Materials Research 96 (January 2010): 21–27. http://dx.doi.org/10.4028/www.scientific.net/amr.96.21.

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The catalytic activities of various nanometer metal oxides (ZnO, CeO2, ZrO2, Al2O3, Co3O4, MgO) supported colloidal gold catalysts with self-designed equipment were evaluated and compared for benzene catalytic oxidation. The results showed that ZnO was the most activive support of the colloidal gold among these nanometer metal oxides. The effects of Au/ZnO on the activity for benzene oxidation were investigated at 50- 300°C. The optimal gold loading was 2 wt%. The Au/ZnO was characterized using BET, XRD, and TEM methods. The XRD patterns and TEM image showed that gold nanoparticles were well d

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27

Turaeva, Nigora, and Herman Krueger. "Wolkenstein’s Model of Size Effects in CO Oxidation by Gold Nanoparticles." Catalysts 10, no. 3 (2020): 288. http://dx.doi.org/10.3390/catal10030288.

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The Wolkenstein’s theory of catalysis and the d-band theory of formation chemical bonds between transition metal catalysts and adsorbates were used to develop the approach applied to the kinetics of CO oxidation by gold nanoparticles. In the model, within the framework of the mechanism of the reaction going through dissociative adsorption of oxygen molecules and reaction with gas-phase CO molecules, weak and strong chemisorption states of intermediates (O, CO2) were taken into account in the kinetic equations by introducing reversible electronic steps corresponding to electron transfers betwee

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Leguizamón Aparicio, María Silvia, María Lucia Ruiz, Marco Antonio Ocsachoque, Marta Isabel Ponzi, Enrique Rodríguez-Castellón, and Ileana Daniela Lick. "Propane and Naphthalene Oxidation over Gold-Promoted Cobalt Catalysts Supported on Zirconia." Catalysts 10, no. 4 (2020): 387. http://dx.doi.org/10.3390/catal10040387.

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Zirconia-supported gold-promoted cobalt catalysts were synthesized and tested for the complete oxidation of propane and naphthalene. The catalysts were characterized by BET surface area, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), powder X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS). In both propane and naphthalene combustion reactions, the results obtained indicate that catalysts formulated with Co3O4 are more active than those containing only Au. Catalysts prepa

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Li, Huayin, Yuan Tan, Xingkun Chen, et al. "Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts." Catalysts 11, no. 2 (2021): 162. http://dx.doi.org/10.3390/catal11020162.

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Methyl methacrylate (MMA) is an important monomer in fine chemicals. The synthesis of MMA by one-step oxidative esterification from methacrolein with methanol over a heterogeneous catalyst with high activity, selectivity and stability is highly desirable. Herein, Zn-Al-hydrotalcites (HTs)-supported atomically precise Au25 nanoclusters with different molar ratios of Zn2+/Al3+ were prepared and used as the precursors for this reaction. They exhibited good performances in comparison with the gold catalysts prepared by the deposition precipitation method. The structural and electronic properties w

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Liu, Lu, Huayin Li, Yuan Tan, et al. "Metal-Support Synergy of Supported Gold Nanoclusters in Selective Oxidation of Alcohols." Catalysts 10, no. 1 (2020): 107. http://dx.doi.org/10.3390/catal10010107.

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Gold catalysts have been reported to exhibit good performance in aerobic oxidation of alcohols, but the intrinsic origin of the catalytic reactivity is still illusive. The catalyst preparation method, the morphology of the gold particles, and even the support might be key factors that determine the activity. Here, we prepared a series of gold catalysts with different supports, i.e., the hydrotalcite (HT), ZnO, MgO, Al2O3, and SiO2, by using the atomically controlled Au25 nanoclusters (NCs) as the gold precursor. The characterization results of the X-ray diffraction (XRD), UV-vis and transmissi

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Wei, Chao, Zhenzhen Chen, Chao Hu, and Haitao Wang. "Highly active catalysts of iron-based materials with Au nanoparticles for soot oxidation." E3S Web of Conferences 136 (2019): 06029. http://dx.doi.org/10.1051/e3sconf/201913606029.

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Gold nanoparticles supported on transition metal oxide catalysts have been prepared by deposition-precipitation. Their catalytic activity with or without Au doped has been tested for soot oxidation. Au improves the catalytic activity of transition metal oxide for the oxidation of soot particles. Under the catalysis of Au/Co3O4, the initial oxidation temperature of soot is 354 ℃.

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Chen, Yidong, Sarah Lerch, Zafer Say, Christopher Tiburski, Christoph Langhammer, and Kasper Moth-Poulsen. "Catalytically active and thermally stable core–shell gold–silica nanorods for CO oxidation." RSC Advances 11, no. 19 (2021): 11642–50. http://dx.doi.org/10.1039/d1ra01577j.

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Gold nanorods stabilized with mesoporous silica shells are characterized and used as the catalyst for a model CO oxidation reaction to counter the costly sintering phenomena found in many industrial nanoparticle catalysts.

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Han, Qiuwan, Dongyang Zhang, Jiuli Guo, Baolin Zhu, Weiping Huang та Shoumin Zhang. "Improved Catalytic Performance of Au/α-Fe2O3-Like-Worm Catalyst for Low Temperature CO Oxidation". Nanomaterials 9, № 8 (2019): 1118. http://dx.doi.org/10.3390/nano9081118.

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The gold catalysts supported on various morphologies of α-Fe2O3 in carbon monoxide (CO) oxidation reaction have been studied for many researchers. However, how to improve the catalytic activity and thermal stability for CO oxidation is still important. In this work, an unusual morphology of α-Fe2O3 was prepared by hydrothermal method and gold nanoparticles were supported using a deposition-precipitation method. Au/α-Fe2O3 catalyst exhibited great activity for CO oxidation. The crystal structure and microstructure images of α-Fe2O3 were carried out by X-ray diffraction (XRD) and scanning electr

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Schade, Oliver, Paolo Dolcet, Alexei Nefedov, et al. "The Influence of the Gold Particle Size on the Catalytic Oxidation of 5-(Hydroxymethyl)furfural." Catalysts 10, no. 3 (2020): 342. http://dx.doi.org/10.3390/catal10030342.

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For the production of chemicals from biomass, new selective processes are required. The selective oxidation of 5-(Hydroxymethyl)furfural (HMF), a promising platform molecule in fine chemistry, to 2,5-furandicarboxylic acid (FDCA) is considered a promising approach and requires the oxidation of two functional groups. In this study, Au/ZrO2 catalysts with different mean particle sizes were prepared by a chemical reduction method using tetrakis(hydroxymethyl)phosphonium chloride (THPC) and tested in HMF oxidation. The catalyst with the smallest mean particle size (2.1 nm) and the narrowest partic

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Abis, Laura, Nikolaos Dimitritatos, Meenakshisundaram Sankar, Simon J. Freakley, and Graham J. Hutchings. "The Effect of Polymer Addition on Base Catalysed Glycerol Oxidation Using Gold and Gold–Palladium Bimetallic Catalysts." Topics in Catalysis 63, no. 3-4 (2019): 394–402. http://dx.doi.org/10.1007/s11244-019-01212-y.

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Abstract The oxidation of glycerol represents both a viable route to catalytic upgrading of biomass and has become a model reaction for catalytic polyol oxidation. Gold and gold–palladium nanoparticle catalysts prepared by colloidal methods involving polymer additives have been extensively studied. However, the effect of residual polymer at the catalyst surface on reaction pathways has not been decoupled from particle size effects. We show that when using catalysts prepared without polymer stabilisers the addition of either polyvinyl alcohol or polyvinylpyrrolidone to the reaction changes the

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Cai, Zhen Yu, Ming Qiao Zhu, Yue Tang, et al. "Carbon-Supported Gold Catalyst Modified by Doping with Ag for Cyclohexene Oxidation." Advanced Materials Research 236-238 (May 2011): 3046–50. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.3046.

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Carbon-supported gold catalysts Au/C were prepared by an impregnation-reduction method and modified by AgNO3to obtain bi-metallic catalysts Au-Ag/C, which were characterized by X-ray-diffraction (XRD) and Transmission Electron Microscope (TEM). Their catalytic performance was tested in the oxidation of cyclohexene in an autoclave without any solvent. The results showed that Ag doping can significantly enhance the catalytic performance of carbon-supported gold catalyst. Au(1.0 wt.%)-Ag(1.0 wt.%)/C has been found to be an efficient catalyst for the cyclohexene oxidation with a conversion of 27.6

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Kim, Ki-Joong, Young-Jae You, Min-Chul Chung, et al. "Effect of Nanosized Gold Particle Addition to Supported Metal Oxide Catalyst in Methanol Oxidation." Journal of Nanoscience and Nanotechnology 6, no. 11 (2006): 3589–93. http://dx.doi.org/10.1166/jnn.2006.17988.

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Gold has rarely been utilized as a catalytic component because of its poor affinity to chemical species. It is however known that nanosized gold particles promote the dissociation of oxygen or hydrogen. In this study, alumina-supported metal oxide catalysts were prepared by impregnation method and applied to methanol oxidation. The dispersion form and size of the gold particles were observed by transmission electron microscopy (TEM). In the results, the maximum catalytic activity was obtained over the ZnO/Al2O3 catalyst, and the optimum loading was 4 wt%. Furthermore, nanosized gold particles

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Li, Zi Jing, Yan Jiang, Li Da Sun, et al. "Study on Synthesis and Catalysis Application of Nano-Au/C Catalyst." Key Engineering Materials 636 (December 2014): 15–18. http://dx.doi.org/10.4028/www.scientific.net/kem.636.15.

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The size controlled colloidal gold nanoparticles were prepared by sodium citrate photochemical system. The size and morphology of the gold nanoparticles were characterized by TEM and UV-Vis spectroscopy. nanoAu/C catalysts were obtained by loading the gold nanoparticles. The catalysts were used for the catalytic oxidation reaction of glyoxal and glucose in liquid phase. The research results showed that the catalysts had higher catalytic activity, and this preparation method is successful.

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Carrettin, Silvio, Paul McMorn, P. Johnston, et al. "Oxidation of Glycerol Using Supported Gold Catalysts." Topics in Catalysis 27, no. 1-4 (2004): 131–36. http://dx.doi.org/10.1023/b:toca.0000013547.35106.0d.

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Jin, Zhao, Yang-Yang Song, Xin-Pu Fu, Qi-Sheng Song, and Chun-Jiang Jia. "Nanoceria Supported Gold Catalysts for CO Oxidation." Chinese Journal of Chemistry 36, no. 7 (2018): 639–43. http://dx.doi.org/10.1002/cjoc.201700731.

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Baatz, Christine, and Ulf Prüße. "Preparation of gold catalysts for glucose oxidation." Catalysis Today 122, no. 3-4 (2007): 325–29. http://dx.doi.org/10.1016/j.cattod.2006.12.004.

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Prati, Laura, and Gianmario Martra. "New gold catalysts for liquid phase oxidation." Gold Bulletin 32, no. 3 (1999): 96–101. http://dx.doi.org/10.1007/bf03216617.

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de Abreu, Wiury C., Marco A. S. Garcia, Sabrina Nicolodi, Carla V. R. de Moura, and Edmilson M. de Moura. "Magnesium surface enrichment of CoFe2O4 magnetic nanoparticles immobilized with gold: reusable catalysts for green oxidation of benzyl alcohol." RSC Advances 8, no. 7 (2018): 3903–9. http://dx.doi.org/10.1039/c7ra13590d.

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Gold nanoparticles have shown excellent activity for selective oxidation of alcohols; such catalytic systems are highly dependent on the initial activation of the substrates, which must occur on the catalyst surface in heterogeneous catalysts.

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Xu, Sheng Rui, Qin Shuai, Jin Hua Cheng та Xiao Ge Wang. "Catalytic Performance of SO₂ by Colloidal Gold Supported on Nano γ-Fe₂O₃". Advanced Materials Research 178 (грудень 2010): 65–70. http://dx.doi.org/10.4028/www.scientific.net/amr.178.65.

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A new catalyst of gold supported on nanometal oxide for oxidation of SO2 was developed. Deposition-precipitation method was used to prepare gold-based catalysts. The catalytic activity of the catalysts was evaluated by determining the concentration of SO2 with gas chromatography under reaction temperature from 100 to 700°C. The results showed that there was an enhancement of catalytic activity when gold nanoparticles were dispersed on the surface of nano-metal oxides, furthermore, γ-Fe2O3 showed the highest activity as the support of the colloidal gold supported catalysts among the nanometal o

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Zhizhkuna, Svetlana, Svetlana Chornaja, Jevgenija Vladiko, et al. "Oxidation of 1,2-Propanediol to Lactic Acid under Novel Supported Au Catalysts and Reaction Kinetics." Key Engineering Materials 850 (June 2020): 41–47. http://dx.doi.org/10.4028/www.scientific.net/kem.850.41.

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This work demonstrates that 5wt% gold catalysts supported on Al2O3 and TiO2 nanopowders as well as on TiO2 nanofibers are active in the 1,2-propanediol (1,2-PDO) oxidation to lactic acid. The influence of catalysts different parameters and reaction conditions on 1,2-PDO conversion and oxidation process selectivity was studied. The best result was achieved using 5wt%Au/TiO2 catalyst over the following oxidation parameters: c0(1,2-PDO) = 0.3 mol/L, n (1,2-PDO)/n (Au) = 4000 mol/mol, p (O2) = 6 bar, c0(NaOH) = 2 mol/L, t = 60 °C: 1,2-propanediol conversion was 98 % and lactic acid selectivity 89

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Elouarzaki, Kamal, Alan Le Goff, Michael Holzinger, et al. "From gold porphyrins to gold nanoparticles: catalytic nanomaterials for glucose oxidation." Nanoscale 6, no. 15 (2014): 8556–60. http://dx.doi.org/10.1039/c4nr02015d.

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Liu, Chun Xiu, Mei Lin Jia, Yu Hong Bao, Jiang Wang, Sagala, and Ri Ge Tu Zhao. "Preparation, Characterization and Catalytic Activity of Highly Dispersed Gold Catalyst." Advanced Materials Research 875-877 (February 2014): 304–7. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.304.

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Highly dispersed supported gold catalysts have been prepared by solution reduction method using L-lysine as protection agents, and their catalytic activity was evaluated by the liquid phase catalytic oxidation reaction of glucose to gluconic acid. The results suggested that the Au/ZrO2 catalyst, exhibited high activity for the selective oxidation of glucose. At the reaction temperature of 323K, reaction time of 1h, with the NaCO3-NaHCO3 as buffer solution, the yield of gluconic acid was 100%.

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Li, Chang Yan, Song Song Chen, Zhi Xue Zhang, and Jun Zhang. "Gold Catalysts Supported on the Macroporous Nanoparticles Composited of Cerium Oxide for Oxidation of Formaldehyde." Advanced Materials Research 347-353 (October 2011): 2117–20. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.2117.

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Subscript text Subscript textA series of Au/CeO2 catalysts were synthesized and evaluated for formaldehyde catalytic combustion oxidation. In Au/CeO2 catalysts, CeO2 supports with different structure,Au/Macroporous-CeO2 is found to be superior catalyst for formaldehyde catalytic oxidation. According to the analysis of transmission electron microscopy (TEM), the pore size of Macroporous-CeO2 is broader than that of mesoporous SBA-CeO2 support, which could make the active species gold adequately disperse as small nanoparticles, furthermore, it is most noticed that macroporous CeO2 support is ben

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Shi, Min, and Qiang Wang. "Synthesis of Cyclic and Heterocyclic Compounds via Gold-Catalyzed Reactions." Synlett 28, no. 17 (2017): 2230–40. http://dx.doi.org/10.1055/s-0036-1590827.

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This account outlines the latest advances from our group in the field of gold catalysis. A variety of cyclic and heterocyclic compounds, containing different sized skeletons, are synthesized selectively by fine-tuning the substrates, catalysts, and ligands. Au(I)/Au(III) redox catalysis is applied in our latest work through adding external oxidation. The reaction mechanisms are discussed in detail. Moreover, the photoredox catalytic process is also introduced briefly, which opens avenues for the development of new strategies in gold chemistry.1 Introduction2 Gold-Catalyzed Cycloisomerization o

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Rogers, Owen, Samuel Pattisson, Joseph Macginley, et al. "The Low Temperature Solvent-Free Aerobic Oxidation of Cyclohexene to Cyclohexane Diol over Highly Active Au/Graphite and Au/Graphene Catalysts." Catalysts 8, no. 8 (2018): 311. http://dx.doi.org/10.3390/catal8080311.

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The selectivity and activity of gold-catalysts supported on graphite and graphene have been compared in the oxidation of cyclohexene. These catalysts were prepared via impregnation and sol immobilisation methods, and tested using solventless and radical initiator-free reaction conditions. The selectivity of these catalysts has been directed towards cyclohexene epoxide using WO3 as a co-catalyst and further to cyclohexane diol by the addition of water, achieving a maximum selectivity of 17% to the diol. The sol immobilisation catalysts were more reproducible and far more active, however, select

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