Etching‐Doping Sedimentation Equilibrium Strategy: Accelerating Kinetics on Hollow Rh‐Doped CoFe‐Layered Double Hydroxides for Water Splitting
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- Keyu Zhu
- Institute of Special Materials and Technology Fudan University Shanghai 200433 P. R. China
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- Jiyi Chen
- Institute of Special Materials and Technology Fudan University Shanghai 200433 P. R. China
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- Wenjie Wang
- Department of Materials Science Fudan University Shanghai 200433 P. R. China
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- Jiangwen Liao
- Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Science Beijing 100049 China
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- Juncai Dong
- Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Science Beijing 100049 China
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- Mason Oliver Lam Chee
- Department of Mechanical Engineering George Mason University Virginia Virginia Beach 22030 USA
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- Ning Wang
- Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal 23955‐6900 Saudi Arabia
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- Pei Dong
- Department of Mechanical Engineering George Mason University Virginia Virginia Beach 22030 USA
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- Pulickel M. Ajayan
- Department of Materials Science and NanoEngineering Rice University Houston TX 77005 USA
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- Shangpeng Gao
- Department of Materials Science Fudan University Shanghai 200433 P. R. China
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- Jianfeng Shen
- Institute of Special Materials and Technology Fudan University Shanghai 200433 P. R. China
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- Mingxin Ye
- Institute of Special Materials and Technology Fudan University Shanghai 200433 P. R. China
書誌事項
- 公開日
- 2020-07-06
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1002/adfm.202003556
- 公開者
- Wiley
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>Exploring highly active and inexpensive bifunctional electrocatalysts for water‐splitting is considered to be one of the prerequisites for developing hydrogen energy technology. Here, an efficient simultaneous etching‐doping sedimentation equilibrium (EDSE) strategy is proposed to design and prepare hollow Rh‐doped CoFe‐layered double hydroxides for overall water splitting. The elaborate electrocatalyst with optimized composition and typical hollow structure accelerates the electrochemical reactions, which can achieve a current density of 10 mA cm<jats:sup>−2</jats:sup> at an overpotential of 28 mV (600 mA cm<jats:sup>−2</jats:sup> at 188 mV) for hydrogen evolution reaction (HER) and 100 mA cm<jats:sup>−2</jats:sup> at 245 mV for oxygen evolution reaction (OER). The cell voltage for overall water splitting of the electrolyzer assembled by this electrocatalyst is only 1.46 V, a value far lower than that of commercial electrolyzer constructed by Pt/C and RuO<jats:sub>2</jats:sub> and most reported bifunctional electrocatalysts. Furthermore, the existence of Fe vacancies introduced by Rh doping and the typical hollow structure are demonstrated to optimize the entire HER and OER processes. EDSE associates doping with template‐directed hollow structures and paves a new avenue for developing bifunctional electrocatalysts for overall water splitting. It is also believed to be practical in other catalysis fields as well.</jats:p>
収録刊行物
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- Advanced Functional Materials
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Advanced Functional Materials 30 (35), 2020-07-06
Wiley