Ambient Fast Synthesis of Superaerophobic/Superhydrophilic Electrode for Superior Electrocatalytic Water Oxidation

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外文摘要：Developing cost-effective and facile methods to synthesize efficient and stable electrocatalysts for large-scale water splitting is highly desirable but remains a significant challenge.In this study,a facile ambient temperature synthesis of hierarchical nickel-iron(oxy)hydroxides nanosheets on iron foam(FF-FN)with both superhydrophilicity and superaerophobicity is reported.Specifically,the as-fabricated FF-FN electrode demonstrates extraordinary oxygen evolution reaction(OER)activity with an ultralow overpotential of 195 mV at 10 mA cm-2 and a small Tafel slope of 34 mV dec-1 in alkaline media.Further theoretical investigation indicates that the involved lattice oxygen in nickel-iron-based-oxyhydroxide during electrochemical self-reconstruction can significantly reduce the OER reaction overpotential via the dominated lattice oxygen mechanism.The rechargeable Zn-air battery assembled by directly using the as-prepared FF-FN as cathode displays remarkable cycling performance.It is believed that this work affords an economical approach to steer commercial Fe foam into robust electrocatalysts for sustainable energy conversion and storage systems.

外文关键词：

electrocatalysisoxygen evolution reactionoxyhydroxidesuperaerophobicitysuperhydrophilicity

作者：

Jingjun Shen、Jing Li、Bo Li、Yun Zheng、Xiaozhi Bao、Junpo Guo、Yan Guo、Chenglong Lai、Wen Lei、Shuangyin Wang、Huaiyu Shao

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作者单位：

Guangdong-Hong Kong-Macau Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Tai pa,Macau,SAR 999078,China

Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,Key Laboratory of High Performance Polymer-based Composites of Guangdong Province,School of Chemistry,Sun Yat-Sen University,Guangzhou 510275,China

School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China

State Key Laboratory of Chem/Bio-Sensing and Chemometrics,Provincial Hunan Key Laboratory for Graphene Materials and Devices,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China

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基金：

Guangdong-Hong Kong-Macao Joint LaboratoryMacau Science and Technology Development Fund(FDCT)for fundingNational Natural Science Foundation of ChinaNatural Science Foundation of Hubei ProvinceMacao Young Scholars Program,China

项目编号：

2019B1212050010098/2020/A2521043092021CFB011AM2020004

出版年：

2023

DOI：

10.1002/eem2.12462

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(6)

参考文献量59