Catalytic Conversion of Carbon Dioxide to Methane on Ruthenium鈥揅obalt Bimetallic Nanocatalysts and Correlation between Surface Chemistry of Catalysts under Reaction Conditions and Catalytic Performanc
详细信息 查看全文
- 作者：Yuan Zhu ; Shiran Zhang ; Yingchun Ye ; Xueqiang Zhang ; Lei Wang ; Wei Zhu ; Feng Cheng ; Franklin (Feng) Tao
- 刊名：ACS Catalysis
- 出版年：2012
- 出版时间：November 2, 2012
- 年：2012
- 卷：2
- 期：11
- 页码：2403-2408
- 全文大小：387K
- 年卷期：v.2,no.11(November 2, 2012)
- ISSN：2155-5435
文摘
Catalytic conversion of CO2 to CH4 on cobalt oxide and Ru-doped cobalt oxide nanorods was studied with in-house ambient pressure X-ray photoelectron spectroscopy (AP鈥揦PS) using monochromated Al K伪. A correlation between catalytic performances of the two catalysts and their surface chemistry under reaction conditions was built. Active phases of the two catalysts are metallic cobalt and bimetallic Co鈥揜u, respectively. Light-off temperature of Co鈥揜u catalyst is lower than that of a cobalt catalyst. Selectivity to production of CH4 and activity on the Ru-doped cobalt oxide are obviously enhanced by formation of bimetallic Co鈥揜u ultrathin film in its surface region in contrast to that of cobalt catalyst in the temperature range of 200鈥?40 掳C.