Charge Engineering of Mo(2)C@Defect-Rich N-Doped Carbon Nanosheets for Efficient Electrocatalytic H(2) Evolution.
Charge Engineering of Mo(2)C@Defect-Rich N-Doped Carbon Nanosheets for Efficient Electrocatalytic H(2) Evolution.
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DOI:
10.1007/s40820-019-0279-8
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发表时间:
2019-06-01
影响因子:
26.6
通讯作者:
Qin J
中科院分区:
文献类型:
--
作者:
Lei C;Zhou W;Feng Q;Lei Y;Zhang Y;Chen Y;Qin J
The Mo2C modified carbon nanosheets produce a graphene wave structure to form localized charges and further enhance the N-doping effect. The optimal sample shows a Tafel slope as low as 60.6 mV dec−1 and high durability up to 10 h in acidic media. The online version of this article (10.1007/s40820-019-0279-8) contains supplementary material, which is available to authorized users. Charge engineering of carbon materials with many defects shows great potential in electrocatalysis, and molybdenum carbide (Mo2C) is one of the noble-metal-free electrocatalysts with the most potential. Herein, we study the Mo2C on pyridinic nitrogen-doped defective carbon sheets (MoNCs) as catalysts for the hydrogen evolution reaction. Theoretical calculations imply that the introduction of Mo2C produces a graphene wave structure, which in some senses behaves like N doping to form localized charges. Being an active electrocatalyst, MoNCs demonstrate a Tafel slope as low as 60.6 mV dec−1 and high durability of up to 10 h in acidic media. Besides charge engineering, plentiful defects and hierarchical morphology also contribute to good performance. This work underlines the importance of charge engineering to boost catalytic performance. The online version of this article (10.1007/s40820-019-0279-8) contains supplementary material, which is available to authorized users.
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