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<p>BiVO<sub>4</sub> is an ideal photocatalysts for H<sub>2</sub>O<sub>2</sub> generation due to its suitable band edge. In practice, however, the photocatalytic performance of BiVO<sub>4</sub> is substantially low owing to the slow kinetics of 2e<sup>−</sup> O<sub>2</sub> reduction (2e<sup>−</sup> ORR) and water oxidation (WOR) processes. To solve the problems, in this work, the AuPd alloy cocatalyst and the NiOOH cocatalys were modified on the electron (010) facets and the (110) hole facet of BiVO<sub>4</sub> by photodeposition method. The designed AuPd/BiVO<sub>4</sub>/NiOOH(0.5%) photocatalyst showed prominent photocatalytic H<sub>2</sub>O<sub>2</sub> production activity of 289.3 µmmol·L<sup>−1</sup> with an AQE value of 0.89% at 420 nm, which was increased by 40 times compared with the BiVO<sub>4</sub> sample (7.1 µmmolµL<sup>−1</sup>). The outstanding photocatalytic activity of the AuPd/BiVO<sub>4</sub>/NiOOH photocatalyst can be attributed to the synergistic effect of AuPd and NiOOH cocatalysts, which promoted the kinetics of oxygen reduction and water oxidation, and concurrently facilitated the charge separation. The present strategy of dual-cocatalyst rational assembly on different facets of BiVO<sub>4</sub> provides an insight into explore efficient BiVO<sub>4</sub>-based materials for H<sub>2</sub>O<sub>2</sub> production.</p>

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Synergistic Effect of AuPd and NiOOH Cocatalysts Promoting Photoctalytic H2O2 Production of BiVO4 Photocatalyst

  • 期刊论文

  • 发表日期：

    2025年4月14日

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  • Wenjing Qi,
  • Haiyang Shi,
  • Ping Wang,
  • Feng Chen,
  • Xuefei Wang,
  • Huogen Yu

摘要

BiVO4 is an ideal photocatalysts for H2O2 generation due to its suitable band edge. In practice, however, the photocatalytic performance of BiVO4 is substantially low owing to the slow kinetics of 2e− O2 reduction (2e− ORR) and water oxidation (WOR) processes. To solve the problems, in this work, the AuPd alloy cocatalyst and the NiOOH cocatalys were modified on the electron (010) facets and the (110) hole facet of BiVO4 by photodeposition method. The designed AuPd/BiVO4/NiOOH(0.5%) photocatalyst showed prominent photocatalytic H2O2 production activity of 289.3 µmmol·L−1 with an AQE value of 0.89% at 420 nm, which was increased by 40 times compared with the BiVO4 sample (7.1 µmmolµL−1). The outstanding photocatalytic activity of the AuPd/BiVO4/NiOOH photocatalyst can be attributed to the synergistic effect of AuPd and NiOOH cocatalysts, which promoted the kinetics of oxygen reduction and water oxidation, and concurrently facilitated the charge separation. The present strategy of dual-cocatalyst rational assembly on different facets of BiVO4 provides an insight into explore efficient BiVO4-based materials for H2O2 production.