Single non-noble-metal cobalt atom stabilized by pyridinic vacancy graphene: An efficient catalyst for CO oxidation
Single non-noble-metal cobalt atom stabilized by pyridinic vacancy graphene: An efficient catalyst for CO oxidation
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吡啶空位石墨烯稳定的单非贵金属钴原子:CO氧化的有效催化剂
DOI:
10.1016/j.molcata.2016.03.008
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发表时间:
2016-06
影响因子:
--
通讯作者:
Yang Zongxian
中科院分区:
文献类型:
--
作者:
Zhang Xilin;Lu Zhansheng;Yang Zongxian
The low operating temperature, high efficiency and noble-metal-free are the goal of the ideal catalysts. In present study, an efficient noble-metal-free catalyst for CO oxidation with a single cobalt atom incorporated with pyridinic nitrogen graphene (Co-N3-gra) is proposed. The catalytic activity for CO oxidation via various mechanisms on the Co-N3-gra catalyst is investigated using the first-principles method. It is found that the CO oxidation occurs preferably following the Langmuir-Hinshelwood mechanism (CO + O2→ OOCO → CO2+ O) with an energy barrier of 0.86 eV for the rate-limiting step of OOCO formation. Our findings prove that the activity of noble-metal-free Co-N3-gra catalyst is comparable to or even higher than some other single noble-metal-graphene based catalysts.
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