Air-stable phosphorus-doped molybdenum nitride for enhanced elctrocatalytic hydrogen evolution
Air-stable phosphorus-doped molybdenum nitride for enhanced elctrocatalytic hydrogen evolution
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用于增强电催化析氢的空气稳定磷掺杂氮化钼
DOI:
10.1038/s42004-018-0097-9
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发表时间:
2018-12
影响因子:
5.9
通讯作者:
Tianyi Ma
中科院分区:
文献类型:
--
作者:
Junqing Yan;Lingqiao Kong;Yujin Ji;Youyong Li;Jai White;Shengzhong Frank Liu;Xiaopeng Han;Shuit-Tong Lee;Tianyi Ma
Molybdenum-based electrocatalysts for hydrogen evolution have been investigated extensively in recent years. However, unlike other non-oxides, molybdenum nitride generally shows a weak preference for hydrogen evolution and low performance owing to surface oxidation and the strong Mo–H bond. Here, we prepare an air-stable molybdenum nitride through a multi-step solid-state reaction. We find that a uniformly dispersed mixture of the precursors is optimal for preparation of the electrocatalyst. To further enhance hydrogen evolution performance towards practical device applications, phosphorus doping is carried out, using a few layered black phosphorus source. The phosphorus-doped molybdenum nitride (P–Mo–N) sample catalyzes hydrogen evolution with potentials of 105, 145, and 157 mV at the current densities of 10, 50, and 100 mA/cm2, respectively, in 0.5 M H2SO4 solution with a small Tafel slope of 43 mV/dec. Thus it outperforms many of the state-of-art molybdenum-based hydrogen evolution catalysts reported to date.
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11.9
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12.9
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通讯作者:
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通讯作者:
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