1
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Sodpiban O, Kessaratikoon T, Smith J, Ren G, Del Gobbo S, Das S, Chi M, D'Elia V, Gates BC. Catalysts Prepared from Atomically Dispersed Ce(III) on MgO Rival Bulk Ceria for CO Oxidation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55885-55894. [PMID: 37991323 DOI: 10.1021/acsami.3c13708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Atomically dispersed cerium catalysts on an inert, crystalline MgO powder support were prepared by using both Ce(III) and Ce(IV) precursors. The materials were used as catalysts for CO oxidation in a once-through flow reactor and characterized by atomic-resolution scanning transmission electron microscopy, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed reduction, among other techniques, before and after catalysis. The most active catalysts, formed from the precursor incorporating Ce(III), displayed performance similar to that reported for bulk ceria under comparable conditions. The catalyst provided stable time-on-stream performance for as long as it was kept on-stream, 2 days, increasing slightly in activity as the atomically dispersed cerium ions were transformed into ceria nanodomains represented as CeOx and having increased reducibility on the MgO support. The results suggest how highly dispersed supported ceria catalysts with low cerium loadings can be prepared and may pave the way for improved efficiencies of cerium utilization in oxidation catalysis.
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Affiliation(s)
- Ounjit Sodpiban
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Tanika Kessaratikoon
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Jacob Smith
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Guodong Ren
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Silvano Del Gobbo
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Sonali Das
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai 400076, India
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Valerio D'Elia
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
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2
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Jenkinson K, Spadaro MC, Golovanova V, Andreu T, Morante JR, Arbiol J, Bals S. Direct Operando Visualization of Metal Support Interactions Induced by Hydrogen Spillover During CO 2 Hydrogenation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2306447. [PMID: 37865834 DOI: 10.1002/adma.202306447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/18/2023] [Indexed: 10/23/2023]
Abstract
The understanding of catalyst active sites is a fundamental challenge for the future rational design of optimized and bespoke catalysts. For instance, the partial reduction of Ce4+ surface sites to Ce3+ and the formation of oxygen vacancies are critical for CO2 hydrogenation, CO oxidation, and the water gas shift reaction. Furthermore, metal nanoparticles, the reducible support, and metal support interactions are prone to evolve under reaction conditions; therefore a catalyst structure must be characterized under operando conditions to identify active states and deduce structure-activity relationships. In the present work, temperature-induced morphological and chemical changes in Ni nanoparticle-decorated mesoporous CeO2 by means of in situ quantitative multimode electron tomography and in situ heating electron energy loss spectroscopy, respectively, are investigated. Moreover, operando electron energy loss spectroscopy is employed using a windowed gas cell and reveals the role of Ni-induced hydrogen spillover on active Ce3+ site formation and enhancement of the overall catalytic performance.
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Affiliation(s)
- Kellie Jenkinson
- EMAT and NANOlab Center of Excellence, University of Antwerp, Antwerp, 2020, Belgium
| | - Maria Chiara Spadaro
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, Catalonia, 08193, Spain
| | - Viktoria Golovanova
- IREC, Jardins de les Dones de Negre 1, Sant Adrià del Besòs, Barcelona, 08930, Spain
| | - Teresa Andreu
- IREC, Jardins de les Dones de Negre 1, Sant Adrià del Besòs, Barcelona, 08930, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Martí i Franquès, 1-11, Barcelona, 08028, Spain
| | - Joan Ramon Morante
- IREC, Jardins de les Dones de Negre 1, Sant Adrià del Besòs, Barcelona, 08930, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Martí i Franquès, 1-11, Barcelona, 08028, Spain
| | - Jordi Arbiol
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, Catalonia, 08193, Spain
- ICREA, Pg. Lluís Companys 23, Barcelona, Catalonia, 08010, Spain
| | - Sara Bals
- EMAT and NANOlab Center of Excellence, University of Antwerp, Antwerp, 2020, Belgium
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3
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Wang A, Zhao H, Wu Y, Zhang Q, Han C. Cerium-modified amorphous manganese oxides for efficient catalytic removal of ozone. J Environ Sci (China) 2023; 131:151-161. [PMID: 37225376 DOI: 10.1016/j.jes.2022.08.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 08/13/2022] [Accepted: 08/14/2022] [Indexed: 05/26/2023]
Abstract
Manganese-based catalysts were widely developed for catalytic removal of ozone, and the low stability and water inactivation are major challenges. To improve removal performance of ozone, three methods were applied to modify amorphous manganese oxides, including acidification, calcination and Ce modification. The physiochemical properties of prepared samples were characterized, and the catalytic activity for ozone removal was evaluated. All modification methods can promote the removal of ozone by amorphous manganese oxides, and Ce modification showed the most significant enhancement. It was confirmed that the introduction of Ce markedly changed the amount and property of oxygen vacancies in amorphous manganese oxides. Superior catalytic activity of Ce-MnOx can be ascribed to its more content and enhanced formation ability of oxygen vacancies, larger specific surface area and higher oxygen mobility. Furthermore, the durability tests under high relative humidity (80%) determined that Ce-MnOx showed excellent stability and water resistance. These demonstrate the promising potential of amorphously Ce-modified manganese oxides for catalytic removal of ozone.
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Affiliation(s)
- Aijie Wang
- School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Hong Zhao
- School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Yu Wu
- School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Qiuyan Zhang
- School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Chong Han
- School of Metallurgy, Northeastern University, Shenyang 110819, China.
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4
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Gong C, Han J, He C, Shi L, Shan Y, Zhang Z, Wang L, Ren X. Insights into degradation of pharmaceutical pollutant atenolol via electrochemical advanced oxidation processes with modified Ti 4O 7 electrode: Efficiency, stability and mechanism. ENVIRONMENTAL RESEARCH 2023; 228:115920. [PMID: 37068721 DOI: 10.1016/j.envres.2023.115920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/07/2023] [Accepted: 04/14/2023] [Indexed: 05/16/2023]
Abstract
A novel active Ce-doped Ti4O7 (Ti/Ti4O7-Ce) electrode was prepared and evaluated for improvement of the refractory pollutants degradation efficiency in Electrochemical advanced oxidation processes (EAOPs). The results showed that the addition of Ce in Ti/Ti4O7 electrode leading to great impact on •OH generation rate and electrode stability compared to pristine Ti/Ti4O7 electrode. Ti/Ti4O7-Ce electrode presented efficient oxidation capacity for pharmaceutical pollutant atenolol (ATL) in EAOPs, which could be attributed to the improvement of indirect oxidation mediated by electro-generated •OH, as the amount of •OH production was 16.5% higher than that in Ti/Ti4O7 within 120 min. The operational conditions greatly influenced the ATL degradation. The degradation efficiency of ATL increased as the current density, the degradation efficiency reached 100% under pH 4, but it just removed 81% of ATL under pH 10 after 120 min treatment. Results also suggested that the inhibiting effect from the ATL degradation was mostly associated with the decreased oxidation capacity induced by water hardness and natural organic matter (NOM). It displayed a satisfactory durability after 40 cycles of experimental detections in this research. The results of study suggested that Ti/Ti4O7-Ce was a promising electrode for the efficient degradation of PPCPs-polluted wastewater and provided constructive suggestion for the refractory pollutants of EAOPs.
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Affiliation(s)
- Chenhao Gong
- Beijing City University, No. 269, North Fourth Ring Middle Road, Beijing, 100083, China; Institute of Resource and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing, 100095, China.
| | - Junxing Han
- Institute of Resource and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing, 100095, China
| | - Can He
- Institute of Resource and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing, 100095, China
| | - Li Shi
- Institute of Resource and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing, 100095, China
| | - Yue Shan
- Institute of Resource and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing, 100095, China
| | - Zhongguo Zhang
- Institute of Resource and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing, 100095, China.
| | - Liangliang Wang
- Institute of Resource and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing, 100095, China
| | - Xiaojing Ren
- Institute of Resource and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing, 100095, China.
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5
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Kanungo SS, Mishra AK, Mhamane NB, Marelli UK, Kumar D, Gopinath CS. Possible Fine-Tuning of Methane Activation toward C2 Oxygenates by 3d-Transition Metal-Ions Doped Nano-Ceria-Zirconia. Inorg Chem 2022; 61:19577-19587. [DOI: 10.1021/acs.inorgchem.2c03493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Subhashree S. Kanungo
- Catalysis and Inorganic Chemistry Division, CSIR─National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Abhaya Kumar Mishra
- Catalysis and Inorganic Chemistry Division, CSIR─National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
| | - Nitin B. Mhamane
- Catalysis and Inorganic Chemistry Division, CSIR─National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Udaya Kiran Marelli
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
- Organic Chemistry Division, CSIR─National Chemical Laboratory, Pune 411 008, India
| | - Dharmesh Kumar
- Shell Technology Centre, Hardware Park, Bengaluru, Karnataka 562149, India
- Qatar Shell Research and Technology Centre, QSTP, P.O. Box 3747, Doha 3747, Qatar
| | - Chinnakonda S. Gopinath
- Catalysis and Inorganic Chemistry Division, CSIR─National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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6
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Li X, Pereira-Hernández XI, Chen Y, Xu J, Zhao J, Pao CW, Fang CY, Zeng J, Wang Y, Gates BC, Liu J. Functional CeOx nanoglues for robust atomically dispersed catalysts. Nature 2022; 611:284-288. [DOI: 10.1038/s41586-022-05251-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/18/2022] [Indexed: 11/09/2022]
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7
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García-Vargas CE, Collinge G, Yun D, Lee MS, Muravev V, Su YQ, Pereira-Hernández XI, Jiang D, Glezakou VA, Hensen EJM, Rousseau R, Datye AK, Wang Y. Activation of Lattice and Adatom Oxygen by Highly Stable Ceria-Supported Cu Single Atoms. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carlos E. García-Vargas
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
- Environmental Molecular Sciences Laboratory, Richland, Washington99354, United States
| | - Gregory Collinge
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Dongmin Yun
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
| | - Mal-Soon Lee
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Valery Muravev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhoven, The Netherlands
| | - Ya-Qiong Su
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhoven, The Netherlands
| | - Xavier Isidro Pereira-Hernández
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Dong Jiang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
| | - Vassiliki-Alexandra Glezakou
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhoven, The Netherlands
| | - Roger Rousseau
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Abhaya K. Datye
- Department of Chemical and Biological Engineering and Center for Micro-engineered Materials, University of New Mexico, Albuquerque, New Mexico87131, United States
| | - Yong Wang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
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8
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Beck A, Rzepka P, Marshall KP, Stoian D, Willinger MG, van Bokhoven JA. Hydrogen Interaction with Oxide Supports in the Presence and Absence of Platinum. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:17589-17597. [PMID: 36304669 PMCID: PMC9589899 DOI: 10.1021/acs.jpcc.2c05478] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/16/2022] [Indexed: 06/16/2023]
Abstract
Oxides are essential catalysts and supports for noble metal catalysts. Their interaction with hydrogen enables, e.g., their use as a hydrogenation catalyst. Among the oxides considered reducible, substantial differences exist in their capability to activate hydrogen and how the oxide structure transforms due to this interaction. Noble metals, like platinum, generally enhance the oxide reduction by hydrogen spillover. This work presents a systematic temperature-programmed reduction study (300 to 873 K) of iron oxide, ceria, titania, zirconia, and alumina, with and without supported platinum. For all catalysts, platinum enhances the reducibility of the oxide. However, there are pronounced differences among all catalysts.
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Affiliation(s)
- Arik Beck
- Institute
for Chemistry and Bioengineering, ETH Zurich, 8093 Zürich, Switzerland
| | - Przemyslaw Rzepka
- Institute
for Chemistry and Bioengineering, ETH Zurich, 8093 Zürich, Switzerland
- Laboratory
for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Kenneth P. Marshall
- The
Swiss-Norwegian Beamlines (SNBL) at ESRF, BP 220, Grenoble 38043, France
| | - Dragos Stoian
- The
Swiss-Norwegian Beamlines (SNBL) at ESRF, BP 220, Grenoble 38043, France
| | - Marc G. Willinger
- TUM
Department of Chemistry, Technical University
of Munich, 85748 Garching, Germany
| | - Jeroen A. van Bokhoven
- Institute
for Chemistry and Bioengineering, ETH Zurich, 8093 Zürich, Switzerland
- Laboratory
for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
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9
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Cardenas L, Molinet-Chinaglia C, Loridant S. Unraveling Ce 3+ detection at the surface of ceria nanopowders by UPS analysis. Phys Chem Chem Phys 2022; 24:22815-22822. [PMID: 36112061 DOI: 10.1039/d2cp02736d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sequential analysis using Ultra-violet Photoelectron Spectroscopy (UPS) and X-ray Photoelectron Spectroscopy (XPS) on ceria nanopowders has been implemented to identify the influence of the X-ray beam on the surface of this oxide. For the first time, UPS analysis evidenced the photoreductive effect of XPS analysis on ceria after an oxidative in situ pretreatment, leading to an overestimation of the Ce3+/Ce4+ ratio obtained by XPS. Based on this spectroscopy methodology, UPS imposes itself as a leading technique for analyzing powders with minimal impact on the authentic chemical state, thus paving the way for identifying the real ratio of Ce4+ and Ce3+ of ceria after oxidative and reductive in situ treatments.
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Affiliation(s)
- Luis Cardenas
- Univ Lyon, Université Claude Bernard-Lyon 1, CNRS, IRCELYON-UMR 5256, 2 av. A. Einstein, F-69626 Villeurbanne Cedex, France.
| | - Clément Molinet-Chinaglia
- Univ Lyon, Université Claude Bernard-Lyon 1, CNRS, IRCELYON-UMR 5256, 2 av. A. Einstein, F-69626 Villeurbanne Cedex, France.
| | - Stéphane Loridant
- Univ Lyon, Université Claude Bernard-Lyon 1, CNRS, IRCELYON-UMR 5256, 2 av. A. Einstein, F-69626 Villeurbanne Cedex, France.
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10
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Wang C, Wang Z, Mao S, Chen Z, Wang Y. Coordination environment of active sites and their effect on catalytic performance of heterogeneous catalysts. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63924-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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11
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Chen L, Verma P, Hou K, Qi Z, Zhang S, Liu YS, Guo J, Stavila V, Allendorf MD, Zheng L, Salmeron M, Prendergast D, Somorjai GA, Su J. Reversible dehydrogenation and rehydrogenation of cyclohexane and methylcyclohexane by single-site platinum catalyst. Nat Commun 2022; 13:1092. [PMID: 35232968 PMCID: PMC8888751 DOI: 10.1038/s41467-022-28607-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 01/20/2022] [Indexed: 11/24/2022] Open
Abstract
Developing highly efficient and reversible hydrogenation-dehydrogenation catalysts shows great promise for hydrogen storage technologies with highly desirable economic and ecological benefits. Herein, we show that reaction sites consisting of single Pt atoms and neighboring oxygen vacancies (VO) can be prepared on CeO2 (Pt1/CeO2) with unique catalytic properties for the reversible dehydrogenation and rehydrogenation of large molecules such as cyclohexane and methylcyclohexane. Specifically, we find that the dehydrogenation rate of cyclohexane and methylcyclohexane on such sites can reach values above 32,000 molH2 molPt−1 h−1, which is 309 times higher than that of conventional supported Pt nanoparticles. Combining of DRIFTS, AP-XPS, EXAFS, and DFT calculations, we show that the Pt1/CeO2 catalyst exhibits a super-synergistic effect between the catalytic Pt atom and its support, involving redox coupling between Pt and Ce ions, enabling adsorption, activation and reaction of large molecules with sufficient versatility to drive abstraction/addition of hydrogen without requiring multiple reaction sites. Developing highly efficient and reversible hydrogenation-dehydrogenation catalysts shows great promise for hydrogen storage technologies. Here the authors develop a highly efficient and reversible de/rehydrogenation single-site platinum catalyst which exhibits great promise for hydrogen storage technologies with cyclic alkanes/aromatics as liquid organic hydrogen carriers.
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Affiliation(s)
- Luning Chen
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.,State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Pragya Verma
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Kaipeng Hou
- Department of Chemistry, University of California-Berkeley, Berkeley, CA, 94720, USA
| | - Zhiyuan Qi
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Shuchen Zhang
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Yi-Sheng Liu
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Jinghua Guo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | | | | | - Lansun Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Miquel Salmeron
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.,Materials Science and Engineering Department, University of California-Berkeley, Berkeley, CA, 94720, USA
| | - David Prendergast
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
| | - Gabor A Somorjai
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA. .,Department of Chemistry, University of California-Berkeley, Berkeley, CA, 94720, USA.
| | - Ji Su
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA. .,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
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12
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Shang Z, Yu Y, Yang H, Yang Z, Xiao Y, Wang X. One-step solution combustion synthesis of micro/nano-scale porous Cu/CeO2 with enhanced photocatalytic properties. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Yuan G, Zhong Y, Chen Y, Zhuo Q, Sun X. Highly sensitive and fast-response ethanol sensing of porous Co 3O 4 hollow polyhedra via palladium reined spillover effect. RSC Adv 2022; 12:6725-6731. [PMID: 35424623 PMCID: PMC8981977 DOI: 10.1039/d1ra09352e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Accepted: 02/16/2022] [Indexed: 11/21/2022] Open
Abstract
Highly sensitive and fast detection of volatile organic compounds (VOCs) in industrial and living environments is an urgent need. The combination of distinctive structure and noble metal modification is an important strategy to achieve high-performance gas sensing materials. In addition, it is urgent to clarify the chemical state and function of noble metals on the surface of the sensing material during the actual sensing process. In this work, Pd modified Co3O4 hollow polyhedral (Pd/Co3O4 HP) is developed through one-step pyrolysis of a Pd doped MOF precursor. At an operating temperature of 150 °C, the Pd/Co3O4 HP gas sensor can achieve 1.6 times higher sensitivity than that of Co3O4 HP along with fast response (12 s) and recovery speed (25 s) for 100 ppm ethanol vapor. Near-ambient pressure X-ray photoelectron spectroscopy (NAPXPS) was used to monitor the dynamic changes in the surface state of Pd/Co3O4 HP. The NAPXPS results reveal that the oxidation and reduction of Pd in the ethanol sensing process are attributed to a spillover effect of oxygen and ethanol, respectively. This work opens up an effective approach to investigate spillover effects in a sensing mechanism of noble metal modified oxide semiconductor sensors. Pd/Co3O4 HP was developed by simple pyrolysis of Pd doped MOF, which achieved high sensitivity with fast response (12 s)/recovery speed (25 s) for 100 ppm ethanol. APXPS results provide experimental evidence to enhance performance by Pd spillover effect.![]()
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Affiliation(s)
- Guotao Yuan
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University Suzhou 215123 China
| | - Yihong Zhong
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University Suzhou 215123 China
| | - Yufeng Chen
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University Suzhou 215123 China
| | - Qiqi Zhuo
- College of Material Science & Engineering, Jiangsu University of Science and Technology Zhenjiang China
| | - Xuhui Sun
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University Suzhou 215123 China
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14
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Kim E, Hong J, Seok H, Kim T. Photo-oxidative degradation of polyacids derived ceria nanoparticle modulation for chemical mechanical polishing. Sci Rep 2022; 12:1613. [PMID: 35102147 PMCID: PMC8803865 DOI: 10.1038/s41598-021-03866-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 12/06/2021] [Indexed: 11/17/2022] Open
Abstract
The effects of photo-oxidative degradation of polyacids at various concentrations and with different durations of ultraviolet (UV) irradiation on the photo-reduction of ceria nanoparticles were investigated. The effect of UV-treated ceria on the performance of chemical mechanical polishing (CMP) for the dielectric layer was also evaluated. When the polyacids were exposed to UV light, they underwent photo-oxidation with consumption of the dissolved oxygen in slurry. UV-treated ceria particles formed oxygen vacancies by absorbing photon energy, resulting in increased Ce3+ ions concentration on the surface, and when the oxygen level of the solution was lowered by the photo-oxidation of polymers, the formation of Ce3+ ions was promoted from 14.2 to 36.5%. Furthermore, chain scissions of polymers occurred during the oxidation process, and polyacids with lower molecular weights were found to be effective in ceria particle dispersion in terms of the decrease in the mean diameter and size distribution maintaining under 0.1 of polydispersity index. With increasing polyacid concentration and UV irradiation time, the Ce3+ concentration and the dispersity of ceria both increased due to the photo-oxidative degradation of the polymer; this enhanced the CMP performance in terms of 87% improved material removal rate and 48% lowered wafer surface roughness.
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Affiliation(s)
- Eungchul Kim
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Jiah Hong
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Hyunho Seok
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, South Korea
| | - Taesung Kim
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, 16419, South Korea. .,SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, South Korea.
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15
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Zhang P, Liu B, Li Y, Chen N, Du Y, Chang W, Yang H, Hong W, Li Y, Yang G. Egg White-Mediated Synthesis and Application of Ag/CeO2 Photocatalyst for Enhanced Photocatalytic Activity under Visible Light Irradiation. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023621140096] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Shun K, Mori K, Masuda S, Hashimoto N, Hinuma Y, Kobayashi H, Yamashita H. Revealing hydrogen spillover pathways in reducible metal oxides. Chem Sci 2022; 13:8137-8147. [PMID: 35919430 PMCID: PMC9278487 DOI: 10.1039/d2sc00871h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 06/08/2022] [Indexed: 12/15/2022] Open
Abstract
Hydrogen spillover, the migration of dissociated hydrogen atoms from noble metals to their support materials, is a ubiquitous phenomenon and is widely utilized in heterogeneous catalysis and hydrogen storage materials. However, in-depth understanding of the migration of spilled hydrogen over different types of supports is still lacking. Herein, hydrogen spillover in typical reducible metal oxides, such as TiO2, CeO2, and WO3, was elucidated by combining systematic characterization methods involving various in situ techniques, kinetic analysis, and density functional theory calculations. TiO2 and CeO2 were proven to be promising platforms for the synthesis of non-equilibrium RuNi binary solid solution alloy nanoparticles displaying a synergistic promotional effect in the hydrolysis of ammonia borane. Such behaviour was driven by the simultaneous reduction of both metal cations under a H2 atmosphere over TiO2 and CeO2, in which hydrogen spillover favorably occurred over their surfaces rather than within their bulk phases. Conversely, hydrogen atoms were found to preferentially migrate within the bulk prior to the surface over WO3. Thus, the reductions of both metal cations occurred individually on WO3, which resulted in the formation of segregated NPs with no activity enhancement. The hydrogen spillover pathway in typical reducible metal oxides, such as TiO2, CeO2, and WO3, was investigated by combining various in situ characterization techniques, kinetic analysis, and density functional theory calculations.![]()
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Affiliation(s)
- Kazuki Shun
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
| | - Shinya Masuda
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Naoki Hashimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yoyo Hinuma
- Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31, Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Hisayoshi Kobayashi
- Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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17
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Muravev V, Spezzati G, Su YQ, Parastaev A, Chiang FK, Longo A, Escudero C, Kosinov N, Hensen EJM. Interface dynamics of Pd–CeO2 single-atom catalysts during CO oxidation. Nat Catal 2021. [DOI: 10.1038/s41929-021-00621-1] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Guo J, Feng Z, Xu J, Zhu J, Zhang G, Du Y, Zhang H, Yan C. Facile Preparation of Methyl Phenols from Ethanol over Lamellar Ce(OH)SO 4· xH 2O. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01096] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jinqiu Guo
- School of Materials Science and Engineering and National Institute for Advanced Materials, Tianjin Key Laboratory for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China
| | - Zongjing Feng
- School of Materials Science and Engineering and National Institute for Advanced Materials, Tianjin Key Laboratory for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China
| | - Jun Xu
- School of Materials Science and Engineering and National Institute for Advanced Materials, Tianjin Key Laboratory for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China
| | - Jie Zhu
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Guanghui Zhang
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Yaping Du
- School of Materials Science and Engineering and National Institute for Advanced Materials, Tianjin Key Laboratory for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China
| | - Hongbo Zhang
- School of Materials Science and Engineering and National Institute for Advanced Materials, Tianjin Key Laboratory for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China
| | - Chunhua Yan
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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19
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Affiliation(s)
- Mi Xiong
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhe Gao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Yong Qin
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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20
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Lin H, Xiao R, Xie R, Yang L, Tang C, Wang R, Chen J, Lv S, Huang Q. Defect Engineering on a Ti 4O 7 Electrode by Ce 3+ Doping for the Efficient Electrooxidation of Perfluorooctanesulfonate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:2597-2607. [PMID: 33502168 DOI: 10.1021/acs.est.0c06881] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Defect engineering in an electrocatalyst, such as doping, has the potential to significantly enhance its catalytic activity and stability. Herein, we report the use of a defect engineering strategy to enhance the electrochemical reactivity of Ti4O7 through Ce3+ doping (1-3 at. %), resulting in the significantly accelerated interfacial charge transfer and yielding a 37-129% increase in the anodic production of the hydroxyl radical (OH•). The Ce3+-doped Ti4O7 electrodes, [(Ti1-xCex)4O7], also exhibited a more stable electrocatalytic activity than the pristine Ti4O7 electrode so as to facilitate the long-term operation. Furthermore, (Ti1-xCex)4O7 electrodes were also shown to effectively mineralize perfluorooctanesulfonate (PFOS) in electrooxidation processes in both a trace-concentration river water sample and a simulated preconcentration waste stream sample. A 3 at. % dopant amount of Ce3+ resulted in a PFOS oxidation rate 2.4× greater than that of the pristine Ti4O7 electrode. X-ray photoelectron spectroscopy results suggest that Ce3+ doping created surficial oxygen vacancies that may be responsible for the enhanced electrochemical reactivity and stability of the (Ti1-xCex)4O7 electrodes. Results of this study provide insights into the defect engineering strategy for boosting the electrochemical performance of the Ti4O7 electrode with a robust reactivity and stability.
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Affiliation(s)
- Hui Lin
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Runlin Xiao
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Ruzhen Xie
- College of Architecture and Environment, Sichuan University, Chengdu 610065, P. R. China
| | - Lihui Yang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Caiming Tang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Rongrong Wang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Jie Chen
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Sihao Lv
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Qingguo Huang
- Department of Crop and Soil Sciences, College of Agricultural and Environmental Sciences, University of Georgia, Griffin, Georgia 30223, United States
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21
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Li Y, Kottwitz M, Vincent JL, Enright MJ, Liu Z, Zhang L, Huang J, Senanayake SD, Yang WCD, Crozier PA, Nuzzo RG, Frenkel AI. Dynamic structure of active sites in ceria-supported Pt catalysts for the water gas shift reaction. Nat Commun 2021; 12:914. [PMID: 33568629 PMCID: PMC7876036 DOI: 10.1038/s41467-021-21132-4] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 01/02/2021] [Indexed: 11/09/2022] Open
Abstract
Oxide-supported noble metal catalysts have been extensively studied for decades for the water gas shift (WGS) reaction, a catalytic transformation central to a host of large volume processes that variously utilize or produce hydrogen. There remains considerable uncertainty as to how the specific features of the active metal-support interfacial bonding—perhaps most importantly the temporal dynamic changes occurring therein—serve to enable high activity and selectivity. Here we report the dynamic characteristics of a Pt/CeO2 system at the atomic level for the WGS reaction and specifically reveal the synergistic effects of metal-support bonding at the perimeter region. We find that the perimeter Pt0 − O vacancy−Ce3+ sites are formed in the active structure, transformed at working temperatures and their appearance regulates the adsorbate behaviors. We find that the dynamic nature of this site is a key mechanistic step for the WGS reaction. Revealing the structure and dynamics of active sites is essential to understand catalytic mechanisms. Here the authors demonstrate the dynamic nature of perimeter Pt0−O vacancy−Ce3+ sites in Pt/CeO2 and the key effects of their dynamics on the mechanism of the water gas shift reaction.
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Affiliation(s)
- Yuanyuan Li
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.
| | - Matthew Kottwitz
- Department of Chemistry, University of Illinois, Urbana, IL, 61801, USA
| | - Joshua L Vincent
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287-6106, USA
| | - Michael J Enright
- Department of Chemistry, University of Illinois, Urbana, IL, 61801, USA
| | - Zongyuan Liu
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Lihua Zhang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Jiahao Huang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | | | - Wei-Chang D Yang
- Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA.,Institute for Research in Electronics and Applied Physics & Maryland NanoCenter, University of Maryland, College Park, MD, 20742, USA
| | - Peter A Crozier
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287-6106, USA
| | - Ralph G Nuzzo
- Department of Chemistry, University of Illinois, Urbana, IL, 61801, USA.,Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Drottning Kristinasväg 51, 100 44, Stockholm, Sweden
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.,Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
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22
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Huang C, Ma P, Wang R, Li W, Wang J, Li H, Tan Y, Luo L, Li X, Bao J. CuCo alloy nanonets derived from CuCo 2O 4 spinel oxides for higher alcohols synthesis from syngas. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01179k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous CuCo alloy nanonets were used as superior catalysts for higher alcohol synthesis from syngas. The catalyst was fabricated via structural topological transformation of CuCo2O4 spinel precursor.
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Affiliation(s)
- Chao Huang
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
| | - Peiyu Ma
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
| | - Ruyang Wang
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
| | - Wenjie Li
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
| | - Jingyan Wang
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
| | - Hongliang Li
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
| | - Yisheng Tan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Lei Luo
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
| | - Xu Li
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
| | - Jun Bao
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230029, Anhui, China
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23
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Feng X, Zheng Y, Lin D, Wu E, Luo Y, You Y, Xue H, Qian Q, Chen Q. Novel synthetic route to Ce-Cu-W-O microspheres for efficient catalytic oxidation of vinyl chloride emissions. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(20)63653-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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24
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Shang Z, Yang Z, Xiao Y, Wang X. Ordered mesoporous Ag/CeO2 nanocrystalline via silica-templated solution combustion for enhanced photocatalytic performance. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125301] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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25
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Ren J, Chen Y. Pitfalls in identifying active catalyst species. Nat Commun 2020; 11:4564. [PMID: 32917853 PMCID: PMC7486908 DOI: 10.1038/s41467-020-18192-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 07/22/2020] [Indexed: 11/09/2022] Open
Affiliation(s)
- Jiazheng Ren
- Energy and Catalysis Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Yongsheng Chen
- Energy and Catalysis Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.
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26
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Keshri KS, Spezzati G, Ruidas S, Hensen E, Chowdhury B. Role of bismuth on aerobic benzyl alcohol oxidation over ceria polymorph-supported gold nanoparticles. CATAL COMMUN 2020. [DOI: 10.1016/j.catcom.2020.106004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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27
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Boosting CO2 hydrogenation via size-dependent metal–support interactions in cobalt/ceria-based catalysts. Nat Catal 2020. [DOI: 10.1038/s41929-020-0459-4] [Citation(s) in RCA: 128] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Ceria-Based Catalysts Studied by Near Ambient Pressure X-ray Photoelectron Spectroscopy: A Review. Catalysts 2020. [DOI: 10.3390/catal10030286] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The development of better catalysts is a passionate topic at the forefront of modern science, where operando techniques are necessary to identify the nature of the active sites. The surface of a solid catalyst is dynamic and dependent on the reaction environment and, therefore, the catalytic active sites may only be formed under specific reaction conditions and may not be stable either in air or under high vacuum conditions. The identification of the active sites and the understanding of their behaviour are essential information towards a rational catalyst design. One of the most powerful operando techniques for the study of active sites is near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS), which is particularly sensitive to the surface and sub-surface of solids. Here we review the use of NAP-XPS for the study of ceria-based catalysts, widely used in a large number of industrial processes due to their excellent oxygen storage capacity and well-established redox properties.
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29
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Deng K, Lin L, Rui N, Vovchok D, Zhang F, Zhang S, Senanayake SD, Kim T, Rodriguez JA. Studies of CO2 hydrogenation over cobalt/ceria catalysts with in situ characterization: the effect of cobalt loading and metal–support interactions on the catalytic activity. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00962h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal–oxide interactions affect the catalytic properties of Co/CeO2 and can be used to control activity and selectivity.
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Affiliation(s)
- Kaixi Deng
- Department of Chemistry
- Stony Brook University
- Stony Brook
- USA
| | - Lili Lin
- Chemistry Division
- Brookhaven National Laboratory
- Upton
- USA
| | - Ning Rui
- Chemistry Division
- Brookhaven National Laboratory
- Upton
- USA
| | | | - Feng Zhang
- Materials Science and Chemical Engineering Department
- Stony Brook University
- Stony Brook
- USA
| | - Shuhao Zhang
- Materials Science and Chemical Engineering Department
- Stony Brook University
- Stony Brook
- USA
| | | | - Taejin Kim
- Materials Science and Chemical Engineering Department
- Stony Brook University
- Stony Brook
- USA
| | - José A. Rodriguez
- Department of Chemistry
- Stony Brook University
- Stony Brook
- USA
- Chemistry Division
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30
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Chen L, Jang H, Kim MG, Qin Q, Liu X, Cho J. FexNiy/CeO2 loaded on N-doped nanocarbon as an advanced bifunctional electrocatalyst for the overall water splitting. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01251f] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synergy of each component in the FexNiy/CeO2/NC renders outstanding electrocatalytic activities and stability toward the HER and OER.
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Affiliation(s)
- Lulu Chen
- State Key Laboratory Base of Eco-Chemical Engineering
- College of Chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao
| | - Haeseong Jang
- Department of Energy Engineering and School of Energy and Chemical Engineering
- Ulsan National Institute of Science and Technology (UNIST)
- Ulsan 689-798
- South Korea
| | - Min Gyu Kim
- Beamline Research Division
- Pohang Accelerator Laboratory (PAL)
- Pohang 790-784
- Korea
| | - Qing Qin
- State Key Laboratory Base of Eco-Chemical Engineering
- College of Chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao
| | - Xien Liu
- State Key Laboratory Base of Eco-Chemical Engineering
- College of Chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao
| | - Jaephil Cho
- Department of Energy Engineering and School of Energy and Chemical Engineering
- Ulsan National Institute of Science and Technology (UNIST)
- Ulsan 689-798
- South Korea
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31
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Jain N, Roy A, Nair S. Reduced SrTiO 3-supported Pt-Cu alloy nanoparticles for preferential oxidation of CO in excess hydrogen. NANOSCALE 2019; 11:22423-22431. [PMID: 31740914 DOI: 10.1039/c9nr07664f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Activity and long-term stability of oxide-metal heterostructure catalysts can be engineered through tuning the oxygen storage capacity (OSC) of the support and careful control of the composition of the supported metal nanoparticle. In this work, we probe these two factors for microwave-synthesized PtCu alloy nanoparticles supported on reduced-SrTiO3. The heterostructures are tested for their activity towards preferential CO oxidation in the presence of H2 at typical operating temperatures used for polymer electrolyte membrane fuel cells (PEMFCs). Through controlled temperature programmed reduction/temperature programmed oxidation (TPR/TPO) experiments, we show that the OSC of the support can be enhanced through heavy surface reduction of SrTiO3. Adsorption-desorption experiments establish the strikingly different CO adsorption behavior over monometallic Pt and PtCu alloy nanoparticles. Through detailed catalytic studies, we establish a trend in the selectivity and stability of CO conversions over the PtCu alloy catalysts that can indeed be tuned by varying the PtCu composition in a facile microwave synthesis.
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Affiliation(s)
- Noopur Jain
- Department of Biological Sciences, National University of Singapore (NUS), Singapore.
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32
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Plakhova TV, Romanchuk AY, Butorin SM, Konyukhova AD, Egorov AV, Shiryaev AA, Baranchikov AE, Dorovatovskii PV, Huthwelker T, Gerber E, Bauters S, Sozarukova MM, Scheinost AC, Ivanov VK, Kalmykov SN, Kvashnina KO. Towards the surface hydroxyl species in CeO 2 nanoparticles. NANOSCALE 2019; 11:18142-18149. [PMID: 31555787 DOI: 10.1039/c9nr06032d] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Understanding the complex chemistry of functional nanomaterials is of fundamental importance. Controlled synthesis and characterization at the atomic level is essential to gain deeper insight into the unique chemical reactivity exhibited by many nanomaterials. Cerium oxide nanoparticles have many industrial and commercial applications, resulting from very strong catalytic, pro- and anti-oxidant activity. However, the identity of the active species and the chemical mechanisms imparted by nanoceria remain elusive, impeding the further development of new applications. Here, we explore the behavior of cerium oxide nanoparticles of different sizes at different temperatures and trace the electronic structure changes by state-of-the-art soft and hard X-ray experiments combined with computational methods. We confirm the absence of the Ce(iii) oxidation state at the surface of CeO2 nanoparticles, even for particles as small as 2 nm. Synchrotron X-ray absorption experiments at Ce L3 and M5 edges, combined with X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and small angle X-ray scattering (SAXS) and theoretical calculations demonstrate that in addition to the nanoceria charge stability, the formation of hydroxyl groups at the surface profoundly affects the chemical performance of these nanomaterials.
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Affiliation(s)
- Tatiana V Plakhova
- Lomonosov Moscow State University, Department of Chemistry, Leninskije Gory 1, Moscow, Russia
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Mehmood R, Mofarah SS, Chen WF, Koshy P, Sorrell CC. Surface, Subsurface, and Bulk Oxygen Vacancies Quantified by Decoupling and Deconvolution of the Defect Structure of Redox-Active Nanoceria. Inorg Chem 2019; 58:6016-6027. [DOI: 10.1021/acs.inorgchem.9b00330] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rashid Mehmood
- School of Materials Science and Engineering, Faculty of Science, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Sajjad S. Mofarah
- School of Materials Science and Engineering, Faculty of Science, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Wen-Fan Chen
- School of Materials Science and Engineering, Faculty of Science, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Pramod Koshy
- School of Materials Science and Engineering, Faculty of Science, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Charles C. Sorrell
- School of Materials Science and Engineering, Faculty of Science, UNSW Sydney, Sydney, NSW 2052, Australia
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34
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Meng R, Feng X, Yang Y, Lv X, Cao J, Tang Y. Cerium-Oxide-Modified Anodes for Efficient and UV-Stable ZnO-Based Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2019; 11:13273-13278. [PMID: 30880385 DOI: 10.1021/acsami.9b01587] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
CeO x has been widely used in optoelectronic devices due to its special electronic and optical structure. Herein, CeO x was directly doped into ZnO to successfully construct a ZnO/CeO x electron transport material (ETM) used in perovskite solar cells (PSCs). The incorporation of CeO x can regulate the chemical compatibility between ZnO and perovskite, unmatched energy levels, and poor UV stability, further enhancing the cell performance and stability of PSCs. As expected, the best efficiency of fabricated CH3NH3PbI3-PSCs based on ZnO/CeO x as the ETM was up to 19.5%. In contrast, the efficiency of PSCs with pure ZnO was 16.0%. Moreover, compared with PSCs based on ZnO, ZnO/CeO x-based PSCs exhibited significantly enhanced moisture, and thermal and UV stability. These results point to the introduction of rare-earth oxides, which could accelerate the industrialization of PSCs.
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Affiliation(s)
- Ruiqian Meng
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , China
| | - Xiaoxia Feng
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , China
| | - Yiwei Yang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , China
| | - Xudong Lv
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , China
| | - Jing Cao
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , China
| | - Yu Tang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , China
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Pereira-Hernández XI, DeLaRiva A, Muravev V, Kunwar D, Xiong H, Sudduth B, Engelhard M, Kovarik L, Hensen EJM, Wang Y, Datye AK. Tuning Pt-CeO 2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen. Nat Commun 2019; 10:1358. [PMID: 30911011 PMCID: PMC6433950 DOI: 10.1038/s41467-019-09308-5] [Citation(s) in RCA: 168] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 02/15/2019] [Indexed: 12/02/2022] Open
Abstract
In this work, we compare the CO oxidation performance of Pt single atom catalysts (SACs) prepared via two methods: (1) conventional wet chemical synthesis (strong electrostatic adsorption–SEA) with calcination at 350 °C in air; and (2) high temperature vapor phase synthesis (atom trapping–AT) with calcination in air at 800 °C leading to ionic Pt being trapped on the CeO2 in a thermally stable form. As-synthesized, both SACs are inactive for low temperature (<150 °C) CO oxidation. After treatment in CO at 275 °C, both catalysts show enhanced reactivity. Despite similar Pt metal particle size, the AT catalyst is significantly more active, with onset of CO oxidation near room temperature. A combination of near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO temperature-programmed reduction (CO-TPR) shows that the high reactivity at low temperatures can be related to the improved reducibility of lattice oxygen on the CeO2 support. While single-atom catalysts (SACs) have attracted a lot of interest, the nature of the active sites in SACs remains elusive. Here the authors elucidate that depositing single atoms via high temperature synthesis leads to improved reducibility of lattice oxygen on CeO2 yielding low temperature reactivity of Pt catalysts in CO oxidation.
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Affiliation(s)
| | - Andrew DeLaRiva
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, 87131, USA
| | - Valery Muravev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Deepak Kunwar
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, 87131, USA
| | - Haifeng Xiong
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, 87131, USA
| | - Berlin Sudduth
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, 99164, USA
| | - Mark Engelhard
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA
| | - Libor Kovarik
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA
| | - Emiel J M Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
| | - Yong Wang
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, 99164, USA. .,Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA.
| | - Abhaya K Datye
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, 87131, USA.
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36
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Lee SW, Lee H, Lee DG, Oh S, Lee IS, Park JY. Facile Tuning of Metal/Oxide Interface in Hollow Nanoreactor Affecting Catalytic Activity and Selectivity. Catal Letters 2018. [DOI: 10.1007/s10562-018-2600-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Hassan S, Kumar R, Tiwari A, Song W, van Haandel L, Pandey JK, Hensen E, Chowdhury B. Role of oxygen vacancy in cobalt doped ceria catalyst for styrene epoxidation using molecular oxygen. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.01.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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Oxygen Mobility in Pre-Reduced Nano- and Macro-Ceria with Co Loading: An AP-XPS, In-Situ DRIFTS and TPR Study. Catal Letters 2017. [DOI: 10.1007/s10562-017-2176-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Cao K, Shi L, Gong M, Cai J, Liu X, Chu S, Lang Y, Shan B, Chen R. Nanofence Stabilized Platinum Nanoparticles Catalyst via Facet-Selective Atomic Layer Deposition. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1700648. [PMID: 28656628 DOI: 10.1002/smll.201700648] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 05/04/2017] [Indexed: 06/07/2023]
Abstract
A facet-selective atomic layer deposition method is developed to fabricate oxide nanofence structure to stabilize Pt nanoparticles. CeOx is selectively deposited on Pt nanoparticles' (111) facets and naturally exposes Pt (100) facets. The facet selectivity is realized through different binding energies of Ce precursor fragments chemisorbed on Pt (111) and Pt (100), which is supported by in situ mass gain experiment and corroborated by density functional theory simulations. Such nanofence structure not only has exposed Pt active facets for carbon monoxide oxidation but also forms ceria-metal interfaces that are beneficial for activity enhancement. The composite catalysts show excellent sintering resistance up to 700 °C calcination. CeOx anchors Pt nanoparticles with a strong metal oxide interaction, and nanofence structure around Pt nanoparticles provides physical blocking that suppresses particles migration. The study reveals that forming oxide nanofence structure to encapsulate precious metal nanoparticles is an effective way to simultaneously enhance catalytic activity and thermal stability.
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Affiliation(s)
- Kun Cao
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China
| | - Lu Shi
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China
| | - Miao Gong
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China
| | - Jiaming Cai
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China
| | - Xiao Liu
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China
| | - Shengqi Chu
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yun Lang
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China
| | - Bin Shan
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China
| | - Rong Chen
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China
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40
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Papaefthimiou V, Niakolas DK, Paloukis F, Teschner D, Knop-Gericke A, Haevecker M, Zafeiratos S. Operando observation of nickel/ceria electrode surfaces during intermediate temperature steam electrolysis. J Catal 2017. [DOI: 10.1016/j.jcat.2017.06.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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41
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Artiglia L, Orlando F, Roy K, Kopelent R, Safonova O, Nachtegaal M, Huthwelker T, van Bokhoven JA. Introducing Time Resolution to Detect Ce 3+ Catalytically Active Sites at the Pt/CeO 2 Interface through Ambient Pressure X-ray Photoelectron Spectroscopy. J Phys Chem Lett 2017; 8:102-108. [PMID: 27936758 DOI: 10.1021/acs.jpclett.6b02314] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
X-ray photoelectron spectroscopy has been employed for the qualitative and quantitative characterization of both model and real catalytic surfaces. Recent progress in the detection of photoelectrons has enabled the acquisition of spectra at pressures up to a few tens of millibars. Although reducing the pressure gap represents a remarkable advantage for catalysis, active sites may be short-lived or hidden in the majority of spectator species. Time-resolved experiments, conducted under transient conditions, are a suitable strategy for discriminating between active sites and spectators. In the present work, we characterized the surface of a Pt/CeO2 powder catalyst at 1.0 mbar of a reacting mixture of carbon monoxide and oxygen and, by means of time resolution, identified short-lived active species. We replaced oxygen with nitrogen in the reaction mixture while fast-detecting the core level peaks of cerium. The results indicate that active Ce3+ sites form transiently at the surface when the oxygen is switched off. Analysis of the depth profile shows that Ce3+ ions are located at the ceria surface. The same experiment, performed on platinum-free ceria, reveals negligible reduction, indicating that platinum boosts the formation of Ce3+ active sites at the interface.
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Affiliation(s)
- Luca Artiglia
- Paul Scherrer Institute , CH-5232 Villigen, Switzerland
| | | | - Kanak Roy
- Institute for Chemical and Bioengineering, ETH Zurich , CH-8093 Zurich, Switzerland
| | - René Kopelent
- Paul Scherrer Institute , CH-5232 Villigen, Switzerland
| | - Olga Safonova
- Paul Scherrer Institute , CH-5232 Villigen, Switzerland
| | | | | | - Jeroen A van Bokhoven
- Paul Scherrer Institute , CH-5232 Villigen, Switzerland
- Institute for Chemical and Bioengineering, ETH Zurich , CH-8093 Zurich, Switzerland
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42
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Vasiliades MA, Djinović P, Pintar A, Kovač J, Efstathiou AM. The effect of CeO2–ZrO2 structural differences on the origin and reactivity of carbon formed during methane dry reforming over NiCo/CeO2–ZrO2 catalysts studied by transient techniques. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01009e] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetic rate of inactive and active carbon formation in DRM over CeZrO2-supported NiCo alloy particles depends on the support's oxygen mobility.
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Affiliation(s)
- Michalis A. Vasiliades
- Heterogeneous Catalysis Laboratory
- Chemistry Department
- University of Cyprus
- 1678 Nicosia
- Cyprus
| | - Petar Djinović
- Department of Environmental Sciences and Engineering
- National Institute of Chemistry
- 1000 Ljubljana
- Slovenia
| | - Albin Pintar
- Department of Environmental Sciences and Engineering
- National Institute of Chemistry
- 1000 Ljubljana
- Slovenia
| | - Janez Kovač
- Department of Surface Engineering and Optoelectronics
- Jožef Stefan Institute
- 1000 Ljubljana
- Slovenia
| | - Angelos M. Efstathiou
- Heterogeneous Catalysis Laboratory
- Chemistry Department
- University of Cyprus
- 1678 Nicosia
- Cyprus
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43
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Taherzadeh Lari T, Mirzaei AA, Atashi H. Influence of Fabrication Temperature and Time on Light Olefin Selectivity of Iron–Cobalt–Cerium Mixed Oxide Nanocatalyst for CO Hydrogenation. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03171] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tahereh Taherzadeh Lari
- Department of Chemistry,
Faculty of Science, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, Iran
| | - Ali Akbar Mirzaei
- Department of Chemistry,
Faculty of Science, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, Iran
| | - Hossein Atashi
- Department of Chemical
Engineering, Faculty of Engineering, University of Sistan and Baluchestan, P.O. Box 98164-161, Zahedan, Iran
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44
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Kopelent R, van Bokhoven JA, Nachtegaal M, Szlachetko J, Safonova OV. X-ray emission spectroscopy: highly sensitive techniques for time-resolved probing of cerium reactivity under catalytic conditions. Phys Chem Chem Phys 2016; 18:32486-32493. [PMID: 27869264 DOI: 10.1039/c6cp05830b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Oxygen storage materials such as ceria are used in many catalytic applications because they can reversibly bind and release oxygen. Tools are needed to observe and quantify this activity which involves a change in the cerium oxidation state and to understand the involvement of cerium in catalytic processes. To prove that cerium changes its oxidation state in the catalytic cycle the transient rates of Ce3+ formation and decay should be compared to the overall reaction rate. For such mechanistic studies the time resolution is essential as the quantification of the Ce3+ species should be faster than the reaction rate. However, it is challenging to follow the dynamic changes of the cerium oxidation state under reaction conditions, especially when the concentration of cerium atoms involved in the reaction cycle is low. In this paper, we evaluate the sensitivity of high-resolution X-ray emission-based methods for the in situ time-resolved quantification of small concentrations of Ce3+ in ceria-based materials. We demonstrate that resonant X-ray emission spectroscopy (RXES) at optimal excitation energy is more sensitive than high energy resolution off-resonant spectroscopy (HEROS) and non-resonant X-ray emission spectroscopy (non-resonant XES) and that it can track the reactivity of less than 0.3% of cerium atoms in a 1% Pt/CeO2 catalyst in a plug-flow reactor with sub-second time resolution. These results demonstrate that X-ray emission-based methods can be used as very sensitive tools and provide new insights into dynamic changes of the oxidation state in reducible oxides in a variety of applications.
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Affiliation(s)
- R Kopelent
- Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
| | - J A van Bokhoven
- Paul Scherrer Institute, 5232 Villigen PSI, Switzerland. and Institute for Chemical and Bioengineering, ETH Zürich, 8093 Zurich, Switzerland
| | - M Nachtegaal
- Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
| | - J Szlachetko
- Paul Scherrer Institute, 5232 Villigen PSI, Switzerland. and Institute of Physics, Jan Kochanowski University, 25406 Kielce, Poland
| | - O V Safonova
- Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
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45
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Feng N, Liu F, Huang M, Zheng A, Wang Q, Chen T, Cao G, Xu J, Fan J, Deng F. Unravelling the Efficient Photocatalytic Activity of Boron-induced Ti 3+ Species in the Surface Layer of TiO 2. Sci Rep 2016; 6:34765. [PMID: 27708430 PMCID: PMC5052528 DOI: 10.1038/srep34765] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 09/19/2016] [Indexed: 01/14/2023] Open
Abstract
Ti3+ species are highly unstable in air owing to their facile oxidation into Ti4+ species, and thus they cannot concentrate in the surface layer of TiO2 but are mainly present in its bulk. We report generation of abundant and stable Ti3+ species in the surface layer of TiO2 by boron doping for efficient utilization of solar irradiation. The resultant photocatalysts (denoted as B-TiO2−x) exhibit extremely high and stable solar-driven photocatalytic activity toward hydrogen production. The origin of the solar-light activity enhancement in the B-TiO2−x photocatalysts has been thoroughly investigated by various experimental techniques and density functional theory (DFT) calculations. The unique structure invoked by presence of sufficient interstitial boron atoms can lead to substantial variations in density of states of B-TiO2−x, which not only significantly narrow the band gap of TiO2 to improve its visible-light absorption, but also promote the photogenerated electron mobility to enhance its solar-light photocatalytic activity.
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Affiliation(s)
- Ningdong Feng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Fen Liu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Min Huang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Qiang Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Tiehong Chen
- Key Laboratory of Functional Polymer Materials of MOE, Department of Materials Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Gengyu Cao
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Jun Xu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Jie Fan
- Key Laboratory of Applied Chemistry of Zhejiang Province and Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Feng Deng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
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46
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Dubey A, Kolekar SK, Gopinath CS. C−H Activation of Methane to Syngas on MnxCe1−x−yZryO2: A Molecular Beam Study. ChemCatChem 2016. [DOI: 10.1002/cctc.201600365] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Anjani Dubey
- Catalysis Division; National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411 008 India
| | - Sadhu K. Kolekar
- Catalysis Division; National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411 008 India
| | - Chinnakonda S. Gopinath
- Catalysis Division; National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411 008 India
- Center of Excellence on Surface Science; National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411 008 India
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47
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Braglia L, Bugaev AL, Lomachenko KA, Soldatov AV, Lamberti C, Guda AA. Investigation of oxygen vacancies in CeO2/Pt system with synchrotron light techniques. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/712/1/012064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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48
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The Environmental Photochemistry of Oxide Surfaces and the Nature of Frozen Salt Solutions: A New in Situ XPS Approach. Top Catal 2016. [DOI: 10.1007/s11244-015-0515-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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49
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Silverwood IP, Rogers SM, Callear SK, Parker SF, Catlow CRA. Evidence for a surface gold hydride on a nanostructured gold catalyst. Chem Commun (Camb) 2016; 52:533-6. [PMID: 26535487 DOI: 10.1039/c5cc06118k] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Inelastic neutron scattering and isotopic infrared spectroscopy shows formation of surface Au–H, an important intermediate in catalytic mechanisms.
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Affiliation(s)
- I. P. Silverwood
- UK Catalysis Hub
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
- UK
| | - S. M. Rogers
- UK Catalysis Hub
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
- UK
| | - S. K. Callear
- ISIS Facility
- STFC Rutherford Appleton Laboratory
- Didcot
- UK
| | - S. F. Parker
- UK Catalysis Hub
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
- UK
| | - C. R. A. Catlow
- UK Catalysis Hub
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
- UK
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50
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Kopelent R, van Bokhoven JA, Szlachetko J, Edebeli J, Paun C, Nachtegaal M, Safonova OV. Catalytically Active and Spectator Ce3+in Ceria-Supported Metal Catalysts. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503022] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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