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Pulse Studies to Decipher the Role of Surface Morphology in CuO/CeO2 Nanocatalysts for the Water Gas Shift Reaction

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Abstract

The water-gas shift reaction (WGS, CO + H2O → H2 + CO2) was studied over CuO/CeO2 catalysts with two different ceria particle morphologies, in the form of nanospheres (ns) and nanocubes (nc). To understand the strong dependence of the WGS reaction activity on the ceria nanoshapes, pulses of CO (without and with water vapor) were employed during in situ X-ray diffraction and X-ray absorption near edge structure measurements done to characterize the catalysts. The results showed that CuO/CeO2 (ns) exhibited a substantially better activity than CuO/CeO2 (nc). The higher activity was associated with the unique properties of CuO/CeO2 (ns), such as the easier reduction of highly dispersed CuO to metallic Cu, the stability of metallic Cu and a larger concentration of Ce3+ in CeO2 (ns).

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Acknowledgments

The work performed at Brookhaven National Laboratory, was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, and Catalysis Science Program under contract DE-AC02-98CH10886 contract. This work used resources of the National Synchrotron Light Source, which is a DOE Office of Science User Facility. The financial support from the National Natural Science Foundation of China (Grant 21303272) is gratefully acknowledged. Financial support from MINECO (CTQ2012-32928 project) and EU COST CM1104 action is also acknowledged.

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Authors and Affiliations

  1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Chemistry and Materials, South-Central University for Nationalities, Wuhan, 430074, Hubei, China

    Fuzhen Zhao

  2. Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, USA

    Fuzhen Zhao, Zongyuan Liu, Wenqian Xu, Siyu Yao, Rui Si, Jonathan C. Hanson, Sanjaya D. Senanayake & José A. Rodriguez

  3. Center of Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA

    Aaron C. Johnston-Peck

  4. Instituto de Catalísis Y Petroleoquímica, Consejo Superior de Investigaciones Científicas (ICP-CSIC), 28049, Madrid, Spain

    Arturo Martínez-Arias

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  1. Fuzhen Zhao
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  2. Zongyuan Liu
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  3. Wenqian Xu
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  4. Siyu Yao
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  5. Rui Si
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  9. Sanjaya D. Senanayake
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  10. José A. Rodriguez
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Correspondence to José A. Rodriguez.

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Zhao, F., Liu, Z., Xu, W. et al. Pulse Studies to Decipher the Role of Surface Morphology in CuO/CeO2 Nanocatalysts for the Water Gas Shift Reaction. Catal Lett 145, 808–815 (2015). https://doi.org/10.1007/s10562-015-1482-y

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  • DOI: https://doi.org/10.1007/s10562-015-1482-y

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