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Effect of Nickel Oxide Doping to Ceria-Supported Gold Catalyst for CO Oxidation and Water-Gas Shift Reactions

Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
Division of China, TILON Group Technology Limited, Shanghai 200090, China
University of Chinese Academy of Science, Beijing 100049, China
Author to whom correspondence should be addressed.
Catalysts 2018, 8(12), 584;
Received: 31 August 2018 / Revised: 26 September 2018 / Accepted: 27 September 2018 / Published: 26 November 2018
(This article belongs to the Special Issue Active Sites in Catalytic Reaction)
PDF [7182 KB, uploaded 20 December 2018]


Ceria-supported gold catalyst has drew much research interest owing to its high reactivity on CO oxidation and water-gas shift (WGS) reactions. However, till now, there were relatively limited studies on the effect of secondary metal/metal oxide component into gold-ceria system to enhance its catalytic performance. In this work, we synthetized the ceria supported gold-nickel samples via a deposition-precipitation method with the base of NaHCO3 to adjust final pH value of 8~9. We found that the addition of nickel oxide drove off the gold species from the stock solution during synthesis, and thus resulted in a dramatical decrease on doped Au concentration. No crystallized phases of gold and nickel were observed on the surface of ceria nanorods in both X-ray diffraction (XRD) and transmission electron microscopy (TEM). The valence of nickel was maintained as Ni2+ for all the measured samples by X-ray photoelectron spectroscopy (XPS), while gold was oxidized with the increased nickel amount after analysis of X-ray absorption near edge spectroscopy (XANES). The corresponding catalytic tests showed that with the introduction of nickel oxide, the activity of gold-ceria catalyst was promoted for the WGS reaction, but inhibited for the CO oxidation reaction. View Full-Text
Keywords: gold; ceria; nickel oxide; CO oxidation; water-gas shift gold; ceria; nickel oxide; CO oxidation; water-gas shift

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Shu, M.; Wei, S.; Jia, C.-J.; Wang, D.-L.; Si, R. Effect of Nickel Oxide Doping to Ceria-Supported Gold Catalyst for CO Oxidation and Water-Gas Shift Reactions. Catalysts 2018, 8, 584.

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