The utilization of non-noble metal catalysts with robust and highly efficient electrocatalytic activity for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)are extremely important for the large-scale implementation of renewable energy devices.Integration of bifunctional electrocatalysts on both anode and cathode electrodes remains a significant challenge.Herein,we report on a novel and facile strategy to construct the ordered and aligned MoS2 nanosheet-encapsulated metal-organic frame-works(MOFs)derived hollow CoS polyhedron,in-situ grown on a nickel foam(NF).The starfish-like MoS2/CoS/NF heterojunctions were formed due to the ordered growth of the material caused by NF sub-strate.The optimized 2-MoS2/CoS/NF heterojunction exhibits robust bifunctional electrocatalytic activity with a low overpotential of 67 and 207 mV toward the HER and OER at 10 mA cm-2,and the long-term stability,which exceeds most of the reported bifunctional electrocatalysts.Such high electrocatalytic per-formance arises due to the synergistic effect between the MoS2 and CoS phases across the interface,the abundant active sites,as well as the hierarchical pore framework,which collectively enhance the mass and electron transfer during the reactions.The work provides a promising approach to fabricating bifunc-tional catalysts with custom-designed heterojunctions and remarkable performance for applications in electrochemical energy devices and related areas.

Wenxia Chen;Xingwang Zhu;Rui Wang;Wei Wei;Meng Liu;Shuai Dong;Kostya Ken Ostrikov;Shuang-Quan Zang

School of Chemistry and Chemical Engineering,Henan Key Laboratory of Biomolecular Recognition and Sensing,Henan D&A Engineering Center of Advanced Battery Materials,Shangqiu Normal University,Shangqiu 476000,Henan,China;College of Environmental Science and Engineering,Yangzhou University,Yangzhou 225009,Jiangsu,China;Henan Key Laboratory of Crystalline Molecular Functional Materials,Henan International Joint Laboratory of Tumor Theranostical Cluster Materials,Green Catalysis Center and College of Chemistry,Zhengzhou University,Zhengzhou 450001,Henan,China;School of Chemistry and Physics and Centre for Materials Science,Queensland University of Technology(QUT),Brisbane,QLD 4000,Australia

能源化学

[1]Wenxia Chen;Xingwang Zhu;Rui Wang;Wei Wei;Meng Liu;Shuai Dong;Kostya Ken Ostrikov;Shuang-Quan Zang-.Interface-engineered MoS2/CoS/NF bifunctional catalysts for highly-efficient water electrolysis)[J].能源化学,2022(12):16-25

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