1. Atomic-layered Au clusters on α-MoC as catalysts for the low-temperature water-gas shift reaction.
- Author
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Siyu Yao, Xiao Zhang, Wu Zhou, Rui Gao, Wenqian Xu, Yifan Ye, Lili Lin, Xiaodong Wen, Ping Liu, Bingbing Chen, Ethan Crumlin, Jinghua Guo, Zhijun Zuo, Weizhen Li, Jinglin Xie, Li Lu, Kiely, Christopher J., Lin Gu, Chuan Shi, and Rodriguez, José A.
- Subjects
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WATER-gas , *INTERSTITIAL hydrogen generation , *CARBON monoxide , *FUEL cells , *ELECTRON microscopy - Abstract
The water-gas shift (WGS) reaction (where carbon monoxide plus water yields dihydrogen and carbon dioxide) is an essential process for hydrogen generation and carbon monoxide removal in various energy-related chemical operations. This equilibrium-limited reaction is favored at a low working temperature. Potential application in fuel cells also requires a WGS catalyst to be highly active, stable, and energy-efficient and to match the working temperature of on-site hydrogen generation and consumption units. We synthesized layered gold (Au) clusters on a molybdenum carbide (a-MoC) substrate to create an interfacial catalyst system for the ultralow-temperature WGS reaction. Water was activated over a-MoC at 303 kelvin, whereas carbon monoxide adsorbed on adjacent Au sites was apt to react with surface hydroxyl groups formed from water splitting, leading to a high WGS activity at low temperatures. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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