Bimetallic NiMoN Nanowires with a Preferential Reactive Facet: An Ultraefficient Bifunctional Electrocatalyst for Overall Water Splitting

Bin Chang, Jing Yang, Yongliang Shao, Lei Zhang, Weiliu Fan*, Baibiao Huang, Yongzhong Wu, Xiaopeng Hao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

94 Scopus citations

Abstract

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 in situ 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* (ΔGH*) 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 1.498 V at 20 mA cm−2. This work provides insights into improving electrocatalytic activity and developing advanced non-noble metal bifunctional electrocatalysts.

Original languageEnglish (US)
Pages (from-to)3198-3207
Number of pages10
JournalCHEMSUSCHEM
Volume11
Issue number18
DOIs
StatePublished - Sep 21 2018

Bibliographical note

Funding Information:
This work is supported by the National Natural Science Foundation of China (Contract No. 51572153, 51602177), the Major Basic Program of the Natural Science Foundation of Shandong Province (Contract ZR2017ZB0317), the Fundamental Research Funds of Shandong University and Taishan Scholars Program of Shandong Province.

Publisher Copyright:
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • DFT calculations
  • electrocatalysis
  • NiMoN nanowires
  • overall water splitting
  • reactive facet

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Chemical Engineering
  • General Materials Science
  • General Energy

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