Bimetallic NiMoN Nanowires with a Preferential Reactive Facet: An Ultraefficient Bifunctional Electrocatalyst for Overall Water Splitting
Bimetallic NiMoN Nanowires with a Preferential Reactive Facet: An Ultraefficient Bifunctional Electrocatalyst for Overall Water Splitting
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具有优先反应面的双金属 NiMoN 纳米线：一种用于整体水分解的超高效双功能电催化剂
DOI：
10.1002/cssc.201801337
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发表时间：
2018-09-21
期刊：
影响因子：
8.4
通讯作者：
Hao, Xiaopeng
中科院分区：
文献类型：
--
作者：
Chang, Bin;Yang, Jing;Hao, Xiaopeng
Faceted nanomaterials with highly reactive exposed facets have been the target of intense researches owing to their significantly enhanced catalytic performance. NiMoN nanowires with the (100) facet preferentially exposed were prepared by an insitu N/O exchange and the morphology tuned by using a rationally designed NiMoO4 precursor. The facet-tuned NiMoN nanowires exhibited excellent electrocatalytic activity for the hydrogen evolution reaction (HER) under both alkaline and acidic conditions that was comparable to that of noble metal platinum. DFT calculations further revealed that the catalytic activity of NiMoN nanowires towards HER on the (100) reactive facet is significantly greater than that on the (001) or (101) facets, owing to the low adsorption free energy of H* (G(H*)) on the (100) facet. The NiMoN nanowires also demonstrated outstanding activity towards the alkaline oxygen evolution reaction and an excellent durable activity for overall water splitting, with a cell potential as low as 1.498V at 20mAcm(-2). This work provides insights into improving electrocatalytic activity and developing advanced non-noble metal bifunctional electrocatalysts.
