Abstract
Zr-doped BiVO4 photoanodes modified with CoF2 co-catalyst (Zr-CoF2/BiVO4) were designed and synthesized by a simple two-step hydrothermal and calcination method. The photocurrent density of the prepared Zr-CoF2/BiVO4 photoanode is as high as about 3.6 mA/cm2 at 1.23 V vs. RHE (AM 1.5 G). The excellent PEC performance benefits from the cocatalyst loading and the formation of heterojunction. The Zr-CoF2/BiVO4 composite photoanode improves the transfer efficiency of photogenerated carriers and the yield of water splitting. Co2+ site in the CoF2 co-catalyst has excellent water oxidation activity. The metal Zr doping further improves charge separation and conduction, thereby reducing the electron-hole complexation rate to affect PEC performance, enhancing photocurrent as well as oxygen release and providing an effective reference method for exploring solar water decomposition. This scheme provides an effective reference method for exploring solar water decomposition.
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