Crystalline/amorphous heterostructure CoNi/MoO3-x electrocatalyst for alkaline seawater hydrogen evolution at ultra-high current density of 4000 mA/cm2 - Details

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Abstract：

Designing　highly　efficient　nonprecious　metal　electrocatalyst　for　the　hydrogen　evolution　reaction　(HER)　in　seawater　electrolyte,　particularly　under　ultra-high　current　density　conditions,　remains　a　formidable　challenge.　In　this　study,　we　successfully　synthesized　a　crystalline/amorphous　heterostructured　CoNi/MoO3-x　electrocatalyst　through　a　facile　hydrothermal　method　followed　by　a　calcination-reduction　process.　The　as-prepared　CoNi/MoO3-x　catalyst　exhibited　remarkable　HER　catalytic　performance　in　both　alkaline　water　and　seawater　electrolytes.　Notably,　the　catalyst　achieved　impressively　low　overpotentials　of　343　mV　in　1　M　KOH　aqueous　solution　and　294　mV　in　alkaline　natural　seawater　electrolyte　at　an　ultra-high　current　density　of　4000　mA/cm2.　Furthermore,　the　CoNi/MoO3-x　electrocatalyst　demonstrated　outstanding　long-term　stability,　maintaining　robust　performance　at　current　densities　of　3000　and　2000　mA/cm2.　Density　functional　theory　calculations　revealed　that　the　synergetic　effect　between　crystalline　CoNi　and　amorphous　MoO3-x　accelerates　water　dissociation　kinetics　and　optimizes　hydrogen　adsorption.　These　findings　not　only　provide　a　promising　strategy　for　developing　cost-effective,　nonprecious　metal　electrocatalysts　with　superior　HER　performance　at　ampere-level　current　densities,　particularly　for　seawater　splitting　applications.　©　2025　Elsevier　Inc.

Keyword：

CoNi alloy Hydrogen evolution reaction Crystalline/amorphous heterostructure Seawater splitting Ultra-high current density

Author Community：

[ 1 ] [Zhang K.]School of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 2 ] [Su Q.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 3 ] [Han B.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 4 ] [Lv Y.]School of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 5 ] [Shi W.]School of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 6 ] [Wang Y.]School of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 7 ] [Wang P.]College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang, 277160, China
[ 8 ] [Wang Z.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 9 ] [Wang Z.]Beijing University of Technology, Chaoyang District, Beijing, 100124, China
[ 10 ] [Zhao W.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 11 ] [Zhang M.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 12 ] [Ding S.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 13 ] [Ma S.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 14 ] [Du G.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 15 ] [Ye R.]Sichuan Union Shine New Energy Sci-Tech Co., Ltd, Meishan, 620000, China
[ 16 ] [Xu B.]Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
[ 17 ] [Xu B.]Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan, 030024, China

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Related Keywords：

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Source ：

Journal of Colloid and Interface Science

ISSN： 0021-9797

Year： 2025

Volume： 687

Page： 314-324

9 . 9 0 0

JCR@2022

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ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 10

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