Surface/Interface Engineering of Hierarchical MoO2/MoNi4@Ru/RuO2 Heterogeneous Nanosheet Arrays for Alkaline Water Electrolysis with Fast Kinetics

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外文摘要：Realizing the hydrogen economy by water electrolysis is an attractive approach for hydrogen production,while the efficient and stable bifunctional catalysts under high current densities are the bottleneck that limits the half-cell reactions of water splitting.Here,we propose an approach of hydrothermal and thermal annealing methods for robust MoO2/MoNi4@Ru/RuO2 heterogeneous cuboid ar-ray electrocatalyst with multiplying surface-active sites by depositing a monolayer amount of Ru.Benefiting from abundant MoO2/MoNi4@Ru/RuO2 heterointerfaces,MoO2/MoNi4@Ru/RuO2 heterogeneous cuboid array electrocatalysts effectively drive the alkaline water splitting with superior hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)performances.The syn-thesized MoO2/MoNi4@Ru/RuO2 has high HER activity,which realizes the working overpotentials of 48 mV at 50 mA·cm-2,further achieving overpotentials of 230 mV for industry-level 1000 mA·cm-2 in alkaline water electrolysis.Moreover,it also showed an en-hanced OER activity than commercial RuO2 with a small overpotential of 280 mV at 200 mA·cm-2 in alkaline media.When building an electrolyzer with electrodes of(-)MoO2/MoNi4@Ru/RuO2lIMoO2/MoNi4@Ru/RuO2(+),a cell voltage of 1.63 V and 1.75 V is just re-quired to support the current density of 200 mA·cm-2 and 500 mA·cm-2 in alkaline water electrolysis,much lower than that of the electrolyzer of(-)Pt/CIIRuO2(+).This work demonstrates that MoO2/MoNi4@Ru/RuO2 heterogeneous nanosheet arrays are promising candidates for industrial water electrolysis applications,providing a possibility for the exploration of water electrolysis with a large current density.

外文关键词：

Hierarchical heterostructureSurface engineeringBifunctional catalystsHydrogen evolution reactionOxygen evolution reactionWater splittingCatalytic activityElectrocatalysisHeterogeneous catalysis

作者：

Qiong Zhang、Ruixue Zhang、Yingxiu Zhao、Tiantian Sun、Jianyang Gao、Guang-Rui Xu、Zexing Wu、Yu Yang、Lei Wang

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作者单位：

Key Laboratory of Eco-chemical Engineering,Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life Science,Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology,College of Chemistry and Molecular Engineering,School of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao,Shandong 266042,China

College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao,Shandong 266042,China

基金：

国家自然科学基金国家自然科学基金中国博士后科学基金Youth Innovation Team Development Program of Shandong Higher Education InstitutionsOutstanding Youth Foundation of Shandong Province,ChinaTaishan Scholar Young Talent ProgramMajor Scientific and Technological Innovation ProjectMajor Basic Research Program of Natural Science Foundation of Shandong Province

项目编号：

51772162520721972023M7321322022KJ155ZR2019JQ14tsqn2019091142019JZZY020405ZR2020ZD09

出版年：

2024

DOI：

10.1002/cjoc.202300367

中国化学(英文版)

中国化学会上海有机化学研究所

中国化学(英文版)

CSTPCD

影响因子：0.848

ISSN：1001-604X

年,卷(期)：2024.42(2)

参考文献量56