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Multifunctional Active-Center-Transferable Platinum/Lithium Cobalt Oxide Heterostructured Electrocatalysts towards Superior Water Splitting |
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| Authors: | Xiaobo Zheng Dr. Peixin Cui Dr. Yumin Qian Dr. Guoqiang Zhao Prof. Xusheng Zheng Dr. Xun Xu Prof. Zhenxiang Cheng Prof. Yuanyue Liu Prof. Shi Xue Dou Prof. Wenping Sun |
| Affiliation: | 1. School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027 P. R. China Institute for Superconducting and Electronic Materials, Australia Institute for Innovation Material, University of Wollongong, Wollongong, NSW, 2522 Australia These authors contributed equally to this work.;2. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008 P. R. China These authors contributed equally to this work.;3. Texas Materials Institute and Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, 78712 USA;4. School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027 P. R. China Institute for Superconducting and Electronic Materials, Australia Institute for Innovation Material, University of Wollongong, Wollongong, NSW, 2522 Australia;5. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 P. R. China;6. Institute for Superconducting and Electronic Materials, Australia Institute for Innovation Material, University of Wollongong, Wollongong, NSW, 2522 Australia;7. School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027 P. R. China |
| Abstract: | Designing cost-effective and efficient electrocatalysts plays a pivotal role in advancing the development of electrochemical water splitting for hydrogen generation. Herein, multifunctional active-center-transferable heterostructured electrocatalysts, platinum/lithium cobalt oxide (Pt/LiCoO2) composites with Pt nanoparticles (Pt NPs) anchored on LiCoO2 nanosheets, are designed towards highly efficient water splitting. In this electrocatalyst system, the active center can be alternatively switched between Pt species and LiCoO2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Specifically, Pt species are the active centers and LiCoO2 acts as the co-catalyst for HER, whereas the active center transfers to LiCoO2 and Pt turns into the co-catalyst for OER. The unique architecture of Pt/LiCoO2 heterostructure provides abundant interfaces with favorable electronic structure and coordination environment towards optimal adsorption behavior of reaction intermediates. The 30 % Pt/LiCoO2 heterostructured electrocatalyst delivers low overpotentials of 61 and 285 mV to achieve 10 mA cm−2 for HER and OER in alkaline medium, respectively. |
| Keywords: | electrocatalysis heterostructures hydrogen evolution reaction (HER) oxygen evolution reaction (OER) water splitting |