Статья

Co‐Induced Electronic Optimization of Hierarchical NiFe LDH for Oxygen Evolution

Yanping LinCollege of Energy Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 ChinaHao WangSchool of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637459 SingaporeChun‐Kuo PengNational Synchrotron Radiation Research Center Hsinchu Taiwan 30076 R.O.CLiangmin BuCollege of Energy Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 ChinaChao‐Lung ChiangNational Synchrotron Radiation Research Center Hsinchu Taiwan 30076 R.O.CKai TianCollege of Energy Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 ChinaYue ZhaoCollege of Energy Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 ChinaJianqing ZhaoCollege of Energy Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 ChinaYan‐Gu LinCollege of Energy Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 ChinaJong‐Min LeeSchool of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637459 SingaporeLijun GaoCollege of Energy Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 China

2020en

ABI

Аннотация

Abstract Developing efficient and stable non‐noble electrocatalysts for the oxygen evolution reaction (OER) remains challenging for practical applications. While nickel–iron layered double hydroxides (NiFe‐LDH) are emerging as prominent candidates with promising OER activity, their catalytic performance is still restricted by the limited active sites, poor conductivity and durability. Herein, hierarchical nickel–iron–cobalt LDH nanosheets/carbon fibers (NiFeCo‐LDH/CF) are synthesized through solvent‐thermal treatment of ZIF‐67/CF. Extended X‐ray adsorption fine structure analyses reveal that the Co substitution can stabilize the Fe local coordination environment and facilitate the π‐symmetry bonding orbital in NiFeCo‐LDH/CF, thus modifying the electronic structures. Coupling with the structural advantages, including the largely exposed active surface sites and facilitated charge transfer pathway ensured by CF, the resultant NiFeCo‐LDH/CF exhibits excellent OER activity with an overpotential of 249 mV at 10 mA cm −1 as well as robust stability over 20 h.

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Идентификаторы

DOI: 10.1002/smll.202002426

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar