Citation: Jun Yang, Yuxi Liu, Jiguang Deng, Xingtian Zhao, Kunfeng Zhang, Zhuo Han, Hongxing Dai. AgAuPd/meso-Co₃O₄:High-performance catalysts for methanol oxidation[J]. Chinese Journal of Catalysis, ;2019, 40(6): 837-848. doi: 10.1016/S1872-2067(18)63205-X shu

AgAuPd/meso-Co₃O₄:High-performance catalysts for methanol oxidation

Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Received Date: 27 October 2018
Revised Date: 26 November 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21677004, 21876006, and 21622701) and the National High Technology Research and Development Program of China (863 Program, 2015AA034603).

The meso-Co₃O₄ and Ag_xAu_yPd/meso-Co₃O₄ catalysts were prepared using the KIT-6-templating and polyvinyl alcohol-protected NaBH₄ reduction methods, respectively. Various techniques were used to characterize physicochemical properties of these materials. Catalytic performance of the samples was evaluated for methanol combustion. The cubically crystallized Co₃O₄ support displayed a three-dimensionally ordered mesoporous structure. The supported noble metal nanoparticles (NPs) possessed a surface area of 115-125 m²/g, with the noble NPs (average size=2.8-4.5 nm) being uniformly dispersed on the surface of meso-Co₃O₄. Among all of the samples, 0.68 wt% Ag_0.75Au_1.14Pd/meso-Co₃O₄ showed the highest catalytic activity (T_50%=100℃ and T_90% =112℃ at a space velocity of 80000 mL (g^-1 h^-1). The partial deactivation of the 0.68 wt% Ag_0.75Au_1.14Pd/meso-Co₃O₄ sample due to water vapor or carbon dioxide introduction was reversible. It is concluded that the good catalytic performance of 0.68 wt% Ag_0.75Au_1.14Pd/meso-Co₃O₄ was associated with its highly dispersed Ag_0.75Au_1.14Pd alloy NPs, high adsorbed oxygen species concentration, good low-temperature reducibility, and strong interaction between Ag_0.75Au_1.14Pd alloy NPs and meso-Co₃O₄.
- Volatile organic compound,
- Mesoporous cobalt oxide,
- Supported noble metal catalyst,
- AgAuPd alloy nanoparticle,
- Methanol oxidation
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AgAuPd/meso-Co₃O₄:High-performance catalysts for methanol oxidation