Abstract
With the increasing need of clean energy demand, the development of efficient and green electrocatalysts for water electrolysis plays an irreplaceable role in the realization of large-scale production of hydrogen. Herein, an original iron modulated heterogeneous VN/V3O4/Co5·47N nanoparticles (FVOCN) is successfully synthesized using hydrothermal technique and in situ pyrolysis protocol. Through a series of characterization, it is found that the addition of iron in VN/V3O4/Co5·47N (VOCN) can significantly regulate the electronic structure and make it have better electrochemical oxygen evolution activity in 1 M KOH solution as opposed to the VOCN. The catalyst is obtained at the sintering temperature of 600 °C has the best performance, which only requires a lower overpotential of 270 mV to attain the current density of 10 mA cm−2 and superior to commercial IrO2. The method of introducing iron into vanadium-based, cobalt-based nitrides and vanadium-based oxides can broaden the research content of new electrochemical oxygen evolution reaction (OER) catalysts and provide a reference idea for the development of energy industry.
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