Zn–Ni–P Nanoparticles Decorated g-C3N4 Nanosheets Applicated as Photoanode in Photovoltaic Fuel Cells
A novel ternary hybrid catalyst with high-efficient photoelectrocatalytic property, namely composite photocatalyst of Zn–Ni–P@C3N4, was successfully designed and prepared for ethanol oxidation in alkaline media. A new electrode material for photoactivated fuel cells (PFC) was proposed. The Zn–Ni–P@C3N4 photoanode was used to generate electricity by catalytic oxidation of ethanol which was used as a direct fuel. The catalyst with ternary hybrid structure exhibiteds superior catalytic activity for ethanol oxidation. Compared to the nanostructures of Zn–P@C3N4 and Ni–P@C3N4 respectively, it possessed a more negative onset potential, higher oxidation peak current, a greater peak current density and minimum mass transfer resistance. These unique properties above were proved by a series of characterizations which include Cyclic Voltammetry (CV), Linear Scan Voltammetry (LSV), Current–time curves and Electrochemical Impedance Spectroscopy (EIS) etc. The excellent electrocatalytic and photoelectrocatalytic performance could be ascribed to the maximum interfacial contact of Ni2P, ZnP2 and g-C3N4, which decreases the agglomeration of nanostructures and effectively suppresses the recombination of photogenerated electron-hole. This work provides a strategy for the synthesis of superior semiconductor which can be used as an efficient visible-light-driven catalyst for photochemical synthesis and energy conversion.
KeywordsEthanol oxidation Zn–Ni–P@C3N4 photocatalyst Photoanode Hydrogen production
This work was financially supported by the Chinese National Natural Science Foundation (41663012 and 21862002), the Graduate Innovation Project of the North Minzu University (YCX19113), the new technology and system for clean energy catalytic production, Major scientific project of North Minzu University (ZDZX201803) and the Ningxia low-grade resource high value utilization and environmental chemical integration technology innovation team project of North Minzu University.
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