期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 112, 期 36, 页码 14108-14116出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp803976g
关键词
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资金
- Chinese Academy of Science [20069908]
- National Natural Science Foundation of China [20590361]
- National Outstanding Young Scientists Foundation of China [20625620]
- Synfuels CHINA, Co., Ltd.
Spin-polarized density functional theory calculations have been performed to investigate the formation of CHx species from CO dissociation on the double-stepped Co(0001) surface. It is found that the steps not only favor CO dissociation but also are an advantage over CO and C/O hydrogenation. Furthermore, the step with the hcp and fcc sites in alternate arrangement is more active than the other consisting of the 4-fold site. Under realistic Fischer-Tropsch reaction conditions, surface CHxO are the most favored intermediates; and surface CHx are formed from CHxO dissociation, while the direct CO dissociation with carbide intermediate is not competitive.
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