Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 46, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202106147
Keywords
hydrogen evolution reaction; overall water splitting; oxygen evolution reaction; polyoxometalates; zinc cobalt sulfide
Categories
Funding
- National Natural Science Foundation of China [21971221, 21401162, 21773203]
- Special Discipline Zone in Interdisciplinary Program of Yangzhou University [yzuxk202010]
- Fundamental Research Funds for the Central Universities [301918014103]
- High-Level Entrepreneurial and Innovative Talents Program of Yangzhou University
- Lvyangjinfeng Talent Program of Yangzhou
- Priority Academic Program Development of Jiangsu Higher Education Institutions [12KJB150023]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions [PPZY2015B112]
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This study introduces a facile and scalable hydrothermal synthesis method for a bifunctional electrocatalyst POM@ZnCoS/NF for overall water splitting. The electrochemical analysis shows significant performance in alkaline medium, demonstrating the advantage of polyoxometalate incorporation strategy for the design of cost-effective and competent bifunctional catalysts for complete water splitting.
The advancement of a naturally rich and effective bifunctional substance for hydrogen and oxygen evolution reaction is crucial to enhance hydrogen fuel production efficiency via the electrolysis process. Herein, facile and scalable hydrothermal synthesis of bifunctional electrocatalyst of polyoxometalate anchored zinc cobalt sulfide nanowire on Ni-foam (NF) for overall water splitting is reported for the first time. The electrochemical analysis of POM@ZnCoS/NF displays significantly low HER and OER overpotentials of 170/337 and 200/300 mV to attain a current density of 10/40 and 20/50 mA cm(-2), respectively, demonstrating the notable performance of POM@ZnCoS/NF toward H-2 and O-2 evolution reaction in alkaline medium. Additionally, the electrolyzer consisting of the POM@ZnCoS/NF anode and cathode shows an appealing potential of 1.56 V to deliver 10 mA cm(-2) current density for overall water splitting. The high electrocatalytic activity of the POM@ZnCoS/NF is attributed to modulation of the electronic and chemical properties, increment of the electroactive sites and electrochemically active surface area of the zinc cobalt sulfide nanowires due to the anchorage of polyoxometalate nanoparticles. These results demonstrate the advantage of the polyoxometalate incorporation strategy for the design of cost-effective and highly competent bifunctional catalysts for complete water splitting.
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