journal article·2024-09-02

Engineering Boundary Electronic Supply for Boosted Overall Water Splitting

Dongfeng Sun, Pengpeng Qiang, Yanning Qu, Yuan Yu, Shouwei Zuo, Jingyun Zhang, Hu Liu, Xiaodong Hao, Bingshe Xu, Huabin Zhang, Wenhuan Huang

ACS Materials Letters· Volume 6· Issue 9
Publisher page

Abstract

Electrocatalytic hydrogen evolution via water splitting occurs at the electrode surface, particularly at the solid–liquid interfaces. Establishing boundary electron transfer channels is crucial for accelerating water molecule adsorption and mass transfer and achieving adsorption–desorption equilibrium of intermediate products. Drawing inspiration from the structure of a starfish, we constructed a starfish-tentacle-like CoP/Co 2 Fe 1 P/CC heterostructure on a carbon cloth substrate using ZIF as the precursor. This design aimed to enhance the boundary electron transfer capability, providing more interface active sites and thereby accelerating proton transfer and transport. As anticipated, the CoP/Co 2 Fe 1 P/CC catalyst exhibited exceptional performance in both hydrogen and oxygen evolution reactions. It required only a 73 mV overpotential for hydrogen evolution and 253 mV overpotential for oxygen evolution at a current density of 10 mA cm –2 . Notably, it achieved a low voltage of 1.49 V for sustained overall water splitting, surpassing most state-of-the-art transition metal phosphide-based catalysts.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physics & Information Science, Shaanxi University of Science and Technology, Xi’an 710021, China

Xi’an Engineering Research Center of Environmental Nanocomposites, Xi’an 710116, China

School of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China

School of Chemistry & Chemical Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China

Chemistry Program, Physical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia

Key Laboratory of Green and High-End Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China

Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China

Funding

Natural Science Basic Research Program of Shaanxi Province · National Natural Science Foundation of China · Key Research and Development Projects of Shaanxi Province · Chinese Academy of Sciences · Key Research and Development Plan of Xianyang · Key Scientific Research Project in Shanxi Province · Technology Innovation Leading Program of Shaanxi

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