Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202115331
Keywords
Electrocatalysts; Hierarchical nanostructures; Metal hydroxides; Oxygen evolution reaction; Water splitting
Categories
Funding
- National Key R&D Program of China [2021YFE0205000, 2019YFA0110600, 2019YFA0110601]
- National Natural Science Foundation of China [52173133, 82071938, 82001829]
- Science and Technology Project of Sichuan Province [2021YFH0087, 2021YFH0135]
- China Postdoctoral Science Foundation [2021M692303]
- Full-time Postdoctoral Foundation of Sichuan University [2021SCU12013]
- PostDoctor Research Project, West China Hospital, Sichuan University [2020HXBH071]
- State Key Laboratory of Polymer Materials Engineering [sklpme2021-4-02]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Basismodul [LI 3545/1-1]
- Projekt DEAL
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By utilizing an interfacial atom-substitution strategy, a NiFeV nanofiber electrocatalyst was successfully synthesized to enhance the activity of NiFe centers, demonstrating low overpotential and long-term stability. This substitutional growth strategy provides an effective and novel pathway for designing efficient and durable non-noble metal-based OER catalysts.
Developing low-cost electrocatalysts for efficient and robust oxygen evolution reaction (OER) is the key for scalable water electrolysis, for instance, NiFe-based materials. Decorating NiFe catalysts with other transition metals offers a new path to boost their catalytic activities but often suffers from the low controllability of the electronic structures of the NiFe catalytic centers. Here, we report an interfacial atom-substitution strategy to synthesize an electrocatalytic oxygen-evolving NiFeV nanofiber to boost the activity of NiFe centers. The electronic structure analyses suggest that the NiFeV nanofiber exhibits abundant high-valence Fe via a charge transfer from Fe to V. The NiFeV nanofiber supported on a carbon cloth shows a low overpotential of 181 mV at 10 mA cm(-2), along with long-term stability (>20 h) at 100 mA cm(-2). The reported substitutional growth strategy offers an effective and new pathway for the design of efficient and durable non-noble metal-based OER catalysts.
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