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The CoNiO2 as a novel water oxidation cocatalyst to enhance PEC water splitting performance of BiVO4

Abstract

A strategy is proposed for modifying BiVO4 photoanode with CoNiO2 as a novel water oxidation cocatalyst to enhance PEC water splitting performance. The results show that the CoNiO2 has the following functions: reducing photogenerated charge recombination centers; providing trapping sites to promote charge separation; improving the stability of the overall system; providing more active sites and offering a lower overpotential. The BiVO4/CoNiO2 photoanode has a higher photocurrent density (1.16 mA/cm2 at 1.23 V vs. RHE), a lower onset potential (~0.06 V vs. RHE), a larger IPCE (34.37%) and ABPE (0.163%), better stability and a good rate of hydrogen evolution (0.0148 µmolcm-2min-1) and oxygen evolution (0.0076 µmolcm-2min-1). The strategy provides promising prospects for achieving efficient PEC water splitting performance using water oxidation cocatalysts.

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Supplementary files

Article information


Submitted
17 May 2020
Accepted
28 Jun 2020
First published
29 Jun 2020

Chem. Commun., 2020, Accepted Manuscript
Article type
Communication

The CoNiO2 as a novel water oxidation cocatalyst to enhance PEC water splitting performance of BiVO4

G. Fang, Z. Liu, C. Han, X. Ma, H. Lv, C. Huang, Z. Cheng, Z. Tong and P. Wang, Chem. Commun., 2020, Accepted Manuscript , DOI: 10.1039/D0CC03516E

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