Modulating the Electronic Structure of Co2P/NiWO4 by Interfacial Engineering for Enhanced Seawater Electrolysis
ACS Applied Engineering Materials(2023)
摘要
Seawater electrolysis for both hydrogen and oxygen production is of great significance, yet the development of highly active and stable bifunctional catalysts remains a great challenge. Herein, we employ the interfacial engineering strategy to tune and optimize hierarchical Co2P/NiWO4 toward efficient and stable bifunctional electrocatalysts for seawater splitting. Benefiting from high electrical conductivity, large surface area, and abundant active sites, this resultant catalyst displays a high catalytic performance toward the hydrogen and oxygen evolution reaction (HER/OER), affording low overpotentials of 44 and 230 mV at 10 mA cm–2, respectively. Besides, the hierarchical structure leads to higher stability and corrosion resistance, which helps the Co2P/NiWO4 electrocatalyst work well under harsh conditions in seawater. As a result, the Co2P/NiWO4 electrode can afford current densities of 10 and 100 mA cm–2 at voltages of 1.59 and 1.76 V in seawater, respectively, with stability over 100 h of continuous testing. This work provides a versatile interface engineering strategy to synthesize high-performance electrocatalysts for hydrogen generation from seawater splitting.
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关键词
electronic structure,interfacial engineering
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