期刊
JOURNAL OF CATALYSIS
卷 307, 期 -, 页码 162-169出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2013.07.023
关键词
CO2 activation; CO production; Methane synthesis; Metal carbides; Noble metals
资金
- US Department of Energy, Chemical Sciences Division [DE-AC02-98CH10886]
- INTEVEP
- IDB
- Nippon Foundation for Materials Science
- Spanish MICINN/MINECO research grants [FIS2008-02238, CTQ2010-14872/BQU, CTQ2012-30751]
- Generalitat de Catalunya grants [2009SGR1041]
- XRQTC
- ICREA Academia Award for excellence
Small Au, Cu, and Ni particles in contact with TiC(001) display a very high activity for the catalytic hydrogenation of CO2. The major product over these catalysts is CO which is produced by the reverse water gas shift reaction (RWGS, CO2 + H-2 -> CO + H2O). In the cases of Au/TiC(001) and Cu/TiC(001), a substantial amount of methanol is also produced, but no methane is detected. Ni/TiC(001) produces a mixture of CO, methanol, and methane. The highest catalytic activity is found for small two-dimensional particles or clusters of the admetals in close contact with TiC(001). The catalytic activity of the supported metals can be orders of magnitude higher than those-of Au(100), Cu(100), or Ni(100). Density functional calculations point to HOCO as a key intermediate for the generation of CO through the RWGS, with the production of methanol probably involving the hydrogenation of a HCOO intermediate or the CO generated by the RWGS. (C) 2013 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据