BiVO<sub>4</sub>-Based Heterojunction Photocathode for High-Performance Photoelectrochemical Hydrogen Peroxide Production.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38682868.
- Also identified by DOI 10.1021/acs.nanolett.4c00901.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Photoelectrochemical (PEC) cells provide a promising solution for the synthesis of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>). Herein, an integrated photocathode of p-type BiVO<sub>4</sub> (p-BVO) array with tetragonal zircon structure coupled with different metal oxide (MO<sub><i>x</i></sub>, M = Sn, Ti, Ni, and Zn) heterostructure and NiNC cocatalyst (p-BVO/MO<sub><i>x</i></sub>/NiNC) was synthesized for the PEC oxygen reduction reaction (ORR) in production of H<sub>2</sub>O<sub>2</sub>. The p-BVO/SnO<sub>2</sub>/NiNC array achieves the production rate 65.46 μmol L<sup>-1</sup> h<sup>-1</sup> of H<sub>2</sub>O<sub>2</sub> with a Faraday efficiency (FE) of 76.12%. Combined with the H<sub>2</sub>O<sub>2</sub> generation of water oxidation from the n-type Mo-doped BiVO<sub>4</sub> (n-Mo:BVO) photoanode, the unbiased photoelectrochemical cell composed of a p-BVO/SnO<sub>2</sub>/NiNC photocathode and n-Mo:BVO photoanode achieves a total FE of 97.67% for H<sub>2</sub>O<sub>2</sub> generation. The large area BiVO<sub>4</sub>-based tandem cell of 3 × 3 cm<sup>2</sup> can reach a total H<sub>2</sub>O<sub>2</sub> production yield of 338.84 μmol L<sup>-1</sup>. This work paves the way for the rational design and fabrication of artificial photosynthetic cells for the production of liquid solar fuel.