Effective Improvement of Thermodynamics and Kinetics of BiVO4 Photoanode via CuI for Photoelectrochemical Water Oxidation DOI

Yuan Guan,

Zheng Shen,

Xinyi Gu

et al.

Langmuir, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

The preparation of durable and efficient photoanodes for photoelectrochemical water oxidation is great importance in promoting the development green hydrogen production artificial photosynthesis. Here, n-type BiVO4 was combined with p-type CuI to construct a CuI/BiVO4 (CIB-1) p–n heterojunction photoanode. composite photoanode effectively overcame drawbacks BiVO4, such as low separation injection efficiency photogenerated electron–hole pairs. As result, CIB-1 had highest photocurrent density 1.98 mA cm–2, which 2.5 times higher than pure 0.79 cm–2 at 1.23 V (vs RHE) under AM 1.5G light irradiation. lower Tafel slope 23.2 mV decade–1 compared 47.9 so kinetics remarkably advanced over CuI/BiVO4. Based on DFT calculations, OER overpotential 0.480 significantly that 1.546 due free energy from OH– oxygen BiVO4.

Language: Английский

Incorporation of W6+ Metal Ion in CoAl2O4 for Enhanced Green Hydrogen Production: A Synergetic Effect and Phase Contributions DOI

P. Sundararajaperumal,

M. Mahendran, P. Velusamy

et al.

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106410 - 106410

Published: April 1, 2025

Language: Английский

Citations

0
Effective Improvement of Thermodynamics and Kinetics of BiVO4 Photoanode via CuI for Photoelectrochemical Water Oxidation DOI

Yuan Guan,

Zheng Shen,

Xinyi Gu

et al.

Langmuir, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

The preparation of durable and efficient photoanodes for photoelectrochemical water oxidation is great importance in promoting the development green hydrogen production artificial photosynthesis. Here, n-type BiVO4 was combined with p-type CuI to construct a CuI/BiVO4 (CIB-1) p–n heterojunction photoanode. composite photoanode effectively overcame drawbacks BiVO4, such as low separation injection efficiency photogenerated electron–hole pairs. As result, CIB-1 had highest photocurrent density 1.98 mA cm–2, which 2.5 times higher than pure 0.79 cm–2 at 1.23 V (vs RHE) under AM 1.5G light irradiation. lower Tafel slope 23.2 mV decade–1 compared 47.9 so kinetics remarkably advanced over CuI/BiVO4. Based on DFT calculations, OER overpotential 0.480 significantly that 1.546 due free energy from OH– oxygen BiVO4.

Language: Английский

Citations

0