期刊
CHEMCATCHEM
卷 8, 期 7, 页码 1308-1318出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201501284
关键词
hydrogen; nickel; reduction; silicates; surface chemistry
资金
- National University of Singapore
- National Environmental Agency
- Faculty Research Council (NEA-ETRP) [1002114]
- Faculty Research Council (RP) [279-000-407-112]
The role of surface hydroxyl species generated by partially reduced Ni-containing phyllosilicate structures (Ni/SiO2P) in promoting the water-gas-shift (WGS) reaction and methane suppression was investigated. To analyze the effect of the surface hydroxyl species, Ni/SiO2P catalysts reduced at various temperatures were employed. All the Ni/SiO2P catalysts showed enhanced catalytic performances and methane suppression compared to the conventional Ni/SiO2 catalyst. As revealed by diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), methane suppression could be attributed to the inhibition of the formation of nickel subcarbonyl species, and the promotion of WGS activity was attributed to the involvement of surface hydroxyl species (Ni-OH, 3626cm(-1), and Si-OH, 3740cm(-1)). The Ni/SiO2P catalyst reduced at 600 degrees C showed exceptionally superior performance to the other catalysts in the water-gas-shift reaction in terms of turnover frequency (2.79s(-1)) and hydrogen formation rates (492.63mol H(2)g(-1)s(-1)) at 375 degrees C.
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