A Unique NiOOH@FeOOH Heteroarchitecture for Enhanced Oxygen Evolution in Saline Water

Bin Wu; Shun Gong; Yichao LinTao LiAnyang ChenMengyuan ZhaoQiuju ZhangLiang Chen

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A Unique NiOOH@FeOOH Heteroarchitecture for Enhanced Oxygen Evolution in Saline Water

机译：A Unique NiOOH@FeOOH Heteroarchitecture for Enhanced Oxygen Evolution in Saline Water

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The development of highly efficient non-precious metal electrocatalysts forthe oxygen evolution reaction (OER) in low-grade or saline water is currentlyof great importance for the large-scale production of hydrogen. In this study,by using an electrochemical activation pretreatment, metal oxy(hydroxide)nanosheet structures derived from self-supported nickel–iron phosphide andnitride nanoarrays grown on Ni foam are successfully fabricated for OER catalysisin saline water. It is demonstrated that the different NiOOH and NiOOH@FeOOH (NiOOH grown on FeOOH) structures are generated from nickel–ironnitride and phosphide, respectively, after electrochemical activation. In particular,the NiOOH@FeOOH heteroarchitecture shows outstanding electrocatalyticperformance with an ultralow overpotential of 292 mV to drive the currentdensity of 500 mA cm~(?2). An unconventional dual-sites mechanism (UDSM) isproposed to address the OER process on NiOOH@FeOOH and show that theFeOOH underlayer plays a critical role regarding the enhanced OER activity ofNiOOH. The new possible UDSM involving two reaction sites presents a differentunderstanding of the OER process on multi-OH layer complexes, whichis expected to guide the design of heteroarchitecture electrocatalysts.

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来源
《Advanced Materials》 |2022年第43期|2108619.1-2108619.10|共10页
作者
Bin Wu; Shun Gong; Yichao LinTao LiAnyang ChenMengyuan ZhaoQiuju ZhangLiang Chen;
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作者单位

Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology ofZhejiang ProvinceNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo, Zhejiang 315201, P. R. China;

Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology ofZhejiang ProvinceNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo, Zhejiang 315201, P. R. China, Department of Materials Science and Opto-Electro;

Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology ofZhejiang ProvinceNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo, Zhejiang 315201, P. R. China, College of Materials Science and EngineeringXi’a;

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正文语种英语
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electrocatalysis; electrochemical activation pretreatment; heteroarchitectures; oxygen evolution reaction; saline water splitting;

A Unique NiOOH@FeOOH Heteroarchitecture for Enhanced Oxygen Evolution in Saline Water

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