1
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Ziemba M, Weyel J, Hess C. Approaching C1 Reaction Mechanisms Using Combined Operando and Transient Analysis: A Case Study on Cu/CeO 2 Catalysts during the LT-Water–Gas Shift Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Marc Ziemba
- Eduard Zintl Institute of Inorganic and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Jakob Weyel
- Eduard Zintl Institute of Inorganic and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Christian Hess
- Eduard Zintl Institute of Inorganic and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
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2
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Low Temperature Water-Gas Shift: Enhancing Stability through Optimizing Rb Loading on Pt/ZrO2. Catalysts 2021. [DOI: 10.3390/catal11020210] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Recent studies have shown that appropriate levels of alkali promotion can significantly improve the rate of low-temperature water gas shift (LT-WGS) on a range of catalysts. At sufficient loadings, the alkali metal can weaken the formate C–H bond and promote formate dehydrogenation, which is the proposed rate determining step in the formate associative mechanism. In a continuation of these studies, the effect of Rb promotion on Pt/ZrO2 is examined herein. Pt/ZrO2 catalysts were prepared with several different Rb loadings and characterized using temperature programmed reduction mass spectrometry (TPR-MS), temperature programmed desorption (TPD), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), an X-ray absorption near edge spectroscopy (XANES) difference procedure, extended X-ray absorption fine structure spectroscopy (EXAFS) fitting, TPR-EXAFS/XANES, and reactor testing. At loadings of 2.79% Rb or higher, a significant shift was seen in the formate ν(CH) band. The results showed that a Rb loading of 4.65%, significantly improves the rate of formate decomposition in the presence of steam via weakening the formate C–H bond. However, excessive rubidium loading led to the increase in stability of a second intermediate, carbonate and inhibited hydrogen transfer reactions on Pt through surface blocking and accelerated agglomeration during catalyst activation. Optimal catalytic performance was achieved with loadings in the range of 0.55–0.93% Rb, where the catalyst maintained high activity and exhibited higher stability in comparison with the unpromoted catalyst.
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3
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Zhu B, Zhang LY, Liu JL, Zhang XM, Li XS, Zhu AM. TiO 2-supported Au-Ag plasmonic nanocatalysts achieved by plasma restructuring and activation. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123508. [PMID: 32721641 DOI: 10.1016/j.jhazmat.2020.123508] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 06/29/2020] [Accepted: 07/15/2020] [Indexed: 06/11/2023]
Abstract
Plasmonic Au-Ag/TiO2 bimetallic nanocatalyst is regarded as a promising visible-light (VL) photocatalyst due to its wide light absorption and potentially enhanced activity. For its preparation, Au precursors usually contain Cl and co-impregnation/co-deposition suffers from AgCl precipitation, and consequently Au and Ag have to be sequentially supported. However, Au and Ag species of the sequential preparation are individually isolated and difficult to be homogeneously mixed. Here we report an Au-Ag plasmonic nanocatalyst achieved by plasma restructuring and activation from the sequential preparation. The isolated cationic Au and Ag species on the sequentially-prepared Au-Ag/TiO2 sample are restructured to be homogeneously mixed and highly activated by O2 plasma, which can be partially auto-reduced to Au-Ag bimetallic nanoparticles within the induction period of a few minutes in VL photocatalytic oxidation of CO. The Au-Ag plasmonic nanocatalyst exhibits a strongly enhanced activity in the VL photocatalytic reaction. The contribution of O2 plasma treatment and the enhancement mechanism for the Au-Ag plasmonic nanocatalyst are disclosed.
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Affiliation(s)
- Bin Zhu
- College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Lu-Yao Zhang
- College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Jing-Lin Liu
- College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian, 116026, China; Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Xiao-Min Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Xiao-Song Li
- Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Ai-Min Zhu
- Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian, 116024, China.
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4
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Application of Potassium Ion Deposition in Determining the Impact of Support Reducibility on Catalytic Activity of Au/Ceria-Zirconia Catalysts in CO Oxidation, NO Oxidation, and C3H8 Combustion. Catalysts 2020. [DOI: 10.3390/catal10060688] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The purpose of the study was to show how a controlled, subtle change of the reducibility of the support by deposition of potassium ions impacts the activity of gold catalysts. Since the activity of supported gold catalysts in carbon monoxide oxidation is known to strongly depend on the reducibility of the support, this reaction was chosen as the model reaction. The results of tests conducted in a simple system in which the only reagents were CO and O2 showed good agreement with the CO activity trend in tests performed in a complex stream of reagents, which also contained CH4, C2H6, C3H8, NO, and water vapor. The results of the X-ray Diffraction (XRD) studies revealed that the support has the composition Ce0.85Zr0.15O2, that its lattice constant is the same for all samples, and that gold is mostly present in the metallic phase. The reducibility of the systems was established based on Temperature Programmed Reduction (TPR) and in situ XRD measurements in H2 atmosphere. The results show that the low temperature reduction peak, which is due to the presence of gold, is shifted to a higher value by the presence of 0.3 at% potassium ions on the surface. Moreover, the increase of the potassium loading leads to a more pronounced shift. The T50 of CO oxidation in the simple model stream was found to exhibit an excellent linear correlation with the maximum temperature of the low temperature reduction peak of Au catalysts. This means that stabilizing oxygen with a known amount of potassium ions can be numerically used to estimate the T50 in CO oxidation. The results in the complex stream also showed a similar dependence of CO conversion on reducibility, though there was no substantial difference in the activity of the catalysts in other reactions regardless of the potassium loading. These studies have shown that the influence of potassium varies depending on the reaction, which highlights differences in the impact of reducibility and importance of other factors in these reactions.
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5
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Schilling C, Hess C. Elucidating the Role of Support Oxygen in the Water–Gas Shift Reaction over Ceria-Supported Gold Catalysts Using Operando Spectroscopy. ACS Catal 2018. [DOI: 10.1021/acscatal.8b04536] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Schilling
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 8, 64287 Darmstadt, Germany
| | - Christian Hess
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 8, 64287 Darmstadt, Germany
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6
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Devaiah D, Reddy LH, Park SE, Reddy BM. Ceria–zirconia mixed oxides: Synthetic methods and applications. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2018. [DOI: 10.1080/01614940.2017.1415058] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Damma Devaiah
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Chemical Engineering Program, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH, USA
| | - Lankela H. Reddy
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Atomic Mineral Directorate for Exploration & Research, Department of Atomic Energy, Government of India, Shillong, India
| | - Sang-Eon Park
- Laboratory of Nano-Green Catalysis, Department of Chemistry, Inha University, Incheon, Republic of Korea
| | - Benjaram M. Reddy
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Laboratory of Nano-Green Catalysis, Department of Chemistry, Inha University, Incheon, Republic of Korea
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7
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He Y, Du S, Li J, Zhang R, Liang X, Chen B. Mesoporous Ceria-Supported Gold Catalysts Self-Assembled from Monodispersed Ceria Nanoparticles and Nanocubes: A Study of the Crystal Plane Effect for the Low-Temperature Water Gas Shift Reaction. ChemCatChem 2017. [DOI: 10.1002/cctc.201700645] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yeheng He
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing P. R. China
| | - Sanya Du
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing P. R. China
| | - Jianwei Li
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing P. R. China
| | - Runduo Zhang
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing P. R. China
| | - Xin Liang
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing P. R. China
| | - Biaohua Chen
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing P. R. China
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8
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9
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Carter JH, Althahban S, Nowicka E, Freakley SJ, Morgan DJ, Shah PM, Golunski S, Kiely CJ, Hutchings GJ. Synergy and Anti-Synergy between Palladium and Gold in Nanoparticles Dispersed on a Reducible Support. ACS Catal 2016; 6:6623-6633. [PMID: 27990317 PMCID: PMC5154324 DOI: 10.1021/acscatal.6b01275] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 08/03/2016] [Indexed: 11/28/2022]
Abstract
Highly active and stable bimetallic Au-Pd catalysts have been extensively studied for several liquid-phase oxidation reactions in recent years, but there are far fewer reports on the use of these catalysts for low-temperature gas-phase reactions. Here we initially established the presence of a synergistic effect in a range of bimetallic Au-Pd/CeZrO4 catalysts, by measuring their activity for selective oxidation of benzyl alcohol. The catalysts were then evaluated for low-temperature WGS, CO oxidation, and formic acid decomposition, all of which are believed to be mechanistically related. A strong anti-synergy between Au and Pd was observed for these reactions, whereby the introduction of Pd to a monometallic Au catalyst resulted in a significant decrease in catalytic activity. Furthermore, monometallic Pd was more active than Pd-rich bimetallic catalysts. The nature of the anti-synergy was probed by several ex situ techniques, which all indicated a growth in metal nanoparticle size with Pd addition. However, the most definitive information was provided by in situ CO-DRIFTS, in which CO adsorption associated with interfacial sites was found to vary with the molar ratio of the metals and could be correlated with the catalytic activity of each reaction. As a similar correlation was observed between activity and the presence of Au0* (as detected by XPS), it is proposed that peripheral Au0* species form part of the active centers in the most active catalysts for the three gas-phase reactions. In contrast, the active sites for the selective oxidation of benzyl alcohol are generally thought to be electronically modified gold atoms at the surface of the nanoparticles.
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Affiliation(s)
- James H. Carter
- Cardiff Catalysis
Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Sultan Althahban
- Department of Materials Science and Engineering, Lehigh University, 5
East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, United States
| | - Ewa Nowicka
- Cardiff Catalysis
Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Simon J. Freakley
- Cardiff Catalysis
Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - David J. Morgan
- Cardiff Catalysis
Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Parag M. Shah
- Cardiff Catalysis
Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Stanislaw Golunski
- Cardiff Catalysis
Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Christopher J. Kiely
- Department of Materials Science and Engineering, Lehigh University, 5
East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, United States
| | - Graham J. Hutchings
- Cardiff Catalysis
Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
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10
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Yang Q, Du L, Wang X, Jia C, Si R. CO oxidation over Au/ZrLa-doped CeO 2 catalysts: Synergistic effect of zirconium and lanthanum. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(15)61113-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Montini T, Melchionna M, Monai M, Fornasiero P. Fundamentals and Catalytic Applications of CeO2-Based Materials. Chem Rev 2016; 116:5987-6041. [DOI: 10.1021/acs.chemrev.5b00603] [Citation(s) in RCA: 1484] [Impact Index Per Article: 185.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Tiziano Montini
- Department of Chemical and
Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Michele Melchionna
- Department of Chemical and
Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Matteo Monai
- Department of Chemical and
Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Paolo Fornasiero
- Department of Chemical and
Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1, 34127 Trieste, Italy
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12
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Majumder D, Datta A, Mitra MK, Roy S. Kinetic analysis of low concentration CO detection by Au-loaded cerium oxide sensors. RSC Adv 2016. [DOI: 10.1039/c6ra18547a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Gold nanoparticle-loaded cerium oxide sensors detect 10–30 ppm of carbon monoxide in air with very fast response. The response and recovery transients of conductance have been modelled using two-site Langmuir adsorption kinetics.
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Affiliation(s)
- Deblina Majumder
- Sensor and Actuator Division
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata 700032
- India
| | - Aparna Datta
- School of Materials Science and Nanotechnology
- Jadavpur University
- Kolkata 700032
- India
| | - Manoj Kumar Mitra
- Department of Metallurgical and Material Engineering
- Jadavpur University
- Kolkata 700032
- India
| | - Somenath Roy
- Sensor and Actuator Division
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata 700032
- India
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13
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Gai PL, Yoshida K, Ward MR, Walsh M, Baker RT, van de Water L, Watson MJ, Boyes ED. Visualisation of single atom dynamics in water gas shift reaction for hydrogen generation. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01154j] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ real time single atom resolution observations of dynamic water gas shift catalysts in CO + water (WGS) environments.
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Affiliation(s)
- Pratibha L. Gai
- The York Nanocentre
- University of York
- , UK
- Department of Chemistry
- University of York
| | - Kenta Yoshida
- The York Nanocentre
- University of York
- , UK
- Institute for Advanced Research
- Nagoya University
| | - Michael R. Ward
- The York Nanocentre
- University of York
- , UK
- Department of Physics
- University of York
| | - Michael Walsh
- The York Nanocentre
- University of York
- , UK
- Department of Physics
- University of York
| | | | | | | | - Edward D. Boyes
- The York Nanocentre
- University of York
- , UK
- Department of Physics
- University of York
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14
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Liberman EY, Naumkin AV, Mikhailichenko AI, Batrakova MK, Maslakov KI, Revina AA, Papkova MV, Kon’kova TV, Grunskii VN, Gasparyan MD, Karpovich AL, Lizunova AA. Au/Ce0.72Zr0.18Pr0.1O2 nanodisperse catalyst for oxidation of carbon monoxide. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2015. [DOI: 10.1134/s0036024416010167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Perret N, Wang X, Delgado JJ, Blanco G, Chen X, Olmos CM, Bernal S, Keane MA. Selective hydrogenation of benzoic acid over Au supported on CeO2 and Ce0.62Zr0.38O2: Formation of benzyl alcohol. J Catal 2014. [DOI: 10.1016/j.jcat.2014.06.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Vecchietti J, Bonivardi A, Xu W, Stacchiola D, Delgado JJ, Calatayud M, Collins SE. Understanding the Role of Oxygen Vacancies in the Water Gas Shift Reaction on Ceria-Supported Platinum Catalysts. ACS Catal 2014. [DOI: 10.1021/cs500323u] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julia Vecchietti
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC) UNL-CONICET, Güemes 3450, 3000 Santa Fe, Argentina
| | - Adrian Bonivardi
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC) UNL-CONICET, Güemes 3450, 3000 Santa Fe, Argentina
| | - Wenqian Xu
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Dario Stacchiola
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Juan J. Delgado
- Departamento
de de Ciencia de los Materiales e Ingeniería Metalúrgica
y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, 11510 Puerto Real, Cádiz, Spain
| | - Monica Calatayud
- Institut
Universitaire de France, Laboratoire de
Chimie Théorique, Université Piere et Marie Curie and CNRS, UMR 7616, F-75005 Paris, France
| | - Sebastián E. Collins
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC) UNL-CONICET, Güemes 3450, 3000 Santa Fe, Argentina
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17
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Tao FF, Ma Z. Water-gas shift on gold catalysts: catalyst systems and fundamental studies. Phys Chem Chem Phys 2014; 15:15260-70. [PMID: 23928722 DOI: 10.1039/c3cp51326b] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Since the pioneering finding by Haruta et al. that small gold nanoparticles on reducible supports can be highly active for low-temperature CO oxidation, the synthesis, characterization, and application of supported gold catalysts have attracted much attention. The water-gas shift reaction (WGSR: CO + H2O = CO2 + H2) is important for removing CO and upgrading the purity of H2 for fuel cell applications, ammonia synthesis, and selective hydrogenation processes. In recent years, much attention has been paid to exploration the possibility of using supported gold nanocatalysts for WGSR and understanding the fundamental aspects related to catalyst deactivation mechanisms, nature of active sites, and reaction mechanisms. Here we summarize recent advances in the development of supported gold catalysts for this reaction and fundamental insights that can be gained, and furnish our assessment on the status of research progress.
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Affiliation(s)
- Franklin Feng Tao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
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18
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From woody biomass extractives to health-promoting substances: Selective oxidation of the lignan hydroxymatairesinol to oxomatairesinol over Au, Pd, and Au–Pd heterogeneous catalysts. J Catal 2012. [DOI: 10.1016/j.jcat.2012.04.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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ZHANG Y, ZHAN Y, CAO Y, CHEN C, LIN X, ZHENG Q. Low-Temperature Water-Gas Shift Reaction over Au/ZrO2 Catalysts Using Hydrothermally Synthesized Zirconia as Supports. CHINESE JOURNAL OF CATALYSIS 2012. [DOI: 10.1016/s1872-2067(11)60327-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Pilasombat R, Daly H, Goguet A, Breen J, Burch R, Hardacre C, Thompsett D. Investigation of the effect of the preparation method on the activity and stability of Au/CeZrO4 catalysts for the low temperature water gas shift reaction. Catal Today 2012. [DOI: 10.1016/j.cattod.2011.04.053] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Gatica JM, Chen X, Zerrad S, Vidal H, Ali AB. Simultaneous water gas shift and methanation reactions on Ru/Ce0.8Tb0.2O2−x based catalysts. Catal Today 2012. [DOI: 10.1016/j.cattod.2011.05.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Delgado JJ, Cíes JM, López-Haro M, del Río E, Calvino JJ, Bernal S. Recent Progress in Chemical Characterization of Supported Gold Catalysts: CO Adsorption on Au/Ceria–Zirconia. CHEM LETT 2011. [DOI: 10.1246/cl.2011.1210] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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del Río E, Blanco G, Collins S, Haro ML, Chen X, Delgado JJ, Calvino JJ, Bernal S. CO Oxidation Activity of a Au/Ceria-Zirconia Catalyst Prepared by Deposition–Precipitation with Urea. Top Catal 2011. [DOI: 10.1007/s11244-011-9711-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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24
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López-Haro M, Pérez-Omil JA, Hernández-Garrido JC, Trasobares S, Hungría AB, Cíes JM, Midgley PA, Bayle-Guillemaud P, Martínez-Arias A, Bernal S, Delgado JJ, Calvino JJ. Advanced Electron Microscopy Investigation of Ceria-Zirconia-Based Catalysts. ChemCatChem 2010. [DOI: 10.1002/cctc.201000306] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Cíes J, Delgado J, López-Haro M, Pilasombat R, Pérez-Omil J, Trasobares S, Bernal S, Calvino J. Contributions of Electron Microscopy to Understanding CO Adsorption on Powder Au/Ceria-Zirconia Catalysts. Chemistry 2010; 16:9536-43. [DOI: 10.1002/chem.201000866] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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López-Haro M, Delgado J, Cies J, del Rio E, Bernal S, Burch R, Cauqui M, Trasobares S, Pérez-Omil J, Bayle-Guillemaud P, Calvino J. Bridging the Gap between CO Adsorption Studies on Gold Model Surfaces and Supported Nanoparticles. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200903403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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López-Haro M, Delgado J, Cies J, del Rio E, Bernal S, Burch R, Cauqui M, Trasobares S, Pérez-Omil J, Bayle-Guillemaud P, Calvino J. Bridging the Gap between CO Adsorption Studies on Gold Model Surfaces and Supported Nanoparticles. Angew Chem Int Ed Engl 2010; 49:1981-5. [DOI: 10.1002/anie.200903403] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Deshpande PA, Madras G. Support-dependent activity of noble metal substituted oxide catalysts for the water gas shift reaction. AIChE J 2010. [DOI: 10.1002/aic.12177] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Vicario M, Llorca J, Boaro M, de Leitenburg C, Trovarelli A. Redox behavior of gold supported on ceria and ceria-zirconia based catalysts. J RARE EARTH 2009. [DOI: 10.1016/s1002-0721(08)60219-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yeste MP, Hernández JC, Bernal S, Blanco G, Calvino JJ, Pérez-Omil JA, Pintado JM. Comparative study of the reducibility under H2 and CO of two thermally aged Ce0.62Zr0.38O2 mixed oxide samples. Catal Today 2009. [DOI: 10.1016/j.cattod.2008.04.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Deshpande PA, Hegde MS, Madras G. A mechanistic model for the water-gas shift reaction over noble metal substituted ceria. AIChE J 2009. [DOI: 10.1002/aic.12062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Study of the Suitability of a Pt-Based Catalyst for the Upgrading of a Biomass Gasification Syngas Stream via the WGS Reaction. Catal Letters 2008. [DOI: 10.1007/s10562-008-9644-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Menegazzo F, Pinna F, Signoretto M, Trevisan V, Boccuzzi F, Chiorino A, Manzoli M. Highly dispersed gold on zirconia: characterization and activity in low-temperature water gas shift tests. CHEMSUSCHEM 2008; 1:320-326. [PMID: 18605097 DOI: 10.1002/cssc.200700152] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Gold-loaded zirconia and sulfated zirconia catalysts were tested in the low-temperature water gas shift reaction. The samples were characterized by N2 adsorption analysis, temperature-programmed reduction, X-ray diffraction, pulse-flow CO chemisorption, FTIR spectroscopy, and high-resolution transmission electron microscopy. A reference catalyst, Au/TiO2, provided by the World Gold Council was investigated for comparison. CO chemisorption and FTIR data indicate the presence of only highly dispersed gold clusters on the sulfated sample and both small clusters and small particles on the non-sulfated sample. Both gold-zirconia catalysts are much more active than the Au/TiO2 reference sample over all the temperature range investigated. The sample prepared on sulfated zirconia exhibits higher stability than the catalyst on unmodified zirconia. The prominent role in the water gas shift reaction of gold clusters in close contact with the support was deduced.
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