摘要
Catalytic conversion of CO 2 to CH 4 on cobalt oxide and Ru-doped cobalt oxide nanorods was studied with in-house ambient pressure X-ray photoelectron spectroscopy (AP-XPS) using monochromated Al Kα. 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-Ru, respectively. Light-off temperature of Co-Ru catalyst is lower than that of a cobalt catalyst. Selectivity to production of CH 4 and activity on the Ru-doped cobalt oxide are obviously enhanced by formation of bimetallic Co-Ru ultrathin film in its surface region in contrast to that of cobalt catalyst in the temperature range of 200-340 °C.
源语言 | 英语 |
---|---|
页(从-至) | 2403-2408 |
页数 | 6 |
期刊 | ACS Catalysis |
卷 | 2 |
期 | 11 |
DOI | |
出版状态 | 已出版 - 2 11月 2012 |
已对外发布 | 是 |