期刊
SMALL
卷 18, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202105763
关键词
electrocatalysts; heterophase nanostructures; oxygen evolution reaction; transition metal vanadates; water splitting
类别
资金
- National Key R&D Program of China [2021YFE0205000, 2019YFA0110600, 2019YFA0110601]
- National Natural Science Foundation of China [52173133, 82071938, 82001824, 82001829, 51903178, 81971622, 81972070, 51803134]
- Science and Technology Project of Sichuan Province [2021YFH0087, 2021YFH0135, 2021YFS0050, 2021YJ0434, 21YYJC2714, 21ZDYF3763, 2021YFH0180, 2021YJ0554, 2020YFH0087, 2020YJ0055]
- China Postdoctoral Science Foundation [2021M692291, 2021M692288]
- 1.3.5 Project for Disciplines of Excellence, West China Hospital, Sichuan University [ZYJC21047]
- State Key Laboratory of Polymer Materials Engineering [sklpme2021-4-02]
- Fundamental Research Funds for the Central Universities
- Thousand Youth Talents Plan
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [LI 3545/1-1]
- Projekt DEAL
The research proposed a facile and controllable method for synthesizing transition metal-based vanadates catalysts with excellent oxygen evolution reaction (OER) activity and long-term durability, surpassing noble metal-based catalysts, which may expand the scope of designing cost-effective transition metal-based electrocatalysts.
Developing efficient, durable, and low-cost earth-abundant elements-based oxygen evolution reaction (OER) catalysts by rapid and scalable strategies is of great importance for future sustainable electrochemical hydrogen production. The earth-abundant high-valency metals, especially vanadium, can modulate the electronic structure of 3d metal oxides and oxyhydroxides and offer the active sites near-optimal adsorption energies for OER intermediates. Here, the authors propose a facile assembling and regulating strategy to controllably synthesize a serial of transition metal (CoFe, NiFe, and NiCo)-based vanadates for efficient OER catalysis. By tuning the reaction concentrations, NiFe-based vanadates with different crystallinities can be facilely regulated, where the catalyst with moderate heterophase (mixed crystalline and amorphous structures) shows the best OER catalytic activity in terms of low overpotential (267 mV at the current density of 10 mA cm(-2)), low Tafel slope (38 mV per decade), and excellent long-term durability in alkaline electrolyte, exceeding its noble metal-based counterparts (RuO2) and most current existing OER catalysts. This work not only reports a facile and controllable method to synthesize a series of vanadates-based catalysts with heterophase nanostructures for high-performance OER catalysis, but also may expand the scope of designing cost-effective transition metal-based electrocatalysts for water splitting.
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