Tuning the Surface Wettability of a BiVO4Photoanode for Kinetically Modulating Water Oxidative H2O2Accumulation

Shipeng Wan, Chaoran Dong, Jie Jin, Jing Li, Qin Zhong, Kan Zhang, Jong Hyeok Park

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Photoelectrochemical water splitting into H2and H2O2has received increasing attention but suffers from uncontrollable selectivity for water oxidative H2O2production and low solar conversion efficiency. Herein, we present a N2-treated surface oxygen-vacancy-enriched BiVO4photoanode (N-Ovac-BVO), which tunes the surface wettability of BVO toward a kinetics-controlled H2O2production process as well as offers higher charge separation efficiency. As a result, the average Faradaic efficiency (FE) reaches 73.8% from 0.6 to 1.9 V vs RHE with the best FE of 81.2%, up to 4 times higher than that of the BVO photoanode. The H2O2concentration can accumulate to 4.58 × 10-4M at 1.6 V vs RHE in 2 h, and the corresponding production rate reaches 11.45 μmol·h-1. This work reveals the importance of the photoanode surface microenvironment and provides effective guidance for photoanode design toward the regulation of competing reactions in an aqueous solution.

Original languageEnglish
Pages (from-to)3024-3031
Number of pages8
JournalACS Energy Letters
Issue number9
Publication statusPublished - 2022 Sept 9

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (2022H1D3A3A01077254, 2019R1A4A1029237, 2019R1A2C3010479, 2021M3H4A1A03049662). K. Zhang acknowldges the support by NSFC (22172077), the Natural Science Foundation of Jiangsu Province of China (BK20220932, BK20211573), the Jiangsu International Science and Technology Cooperation Program (BZ2020063), and the Fundamental Research Funds for the Central Universities (30921011216). The authors thank Dr. Xiangyu Guo and Lili Xu, who participated in the discussions for analyzing the data obtained from the calculations.

Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry


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