Issue 16, 2024

Conformal coating of superhydrophilic nickel iron phytic acid complex to boost BiVO4 photoanode solar water oxidation

Abstract

The BiVO4 photoanode holds a significant competitive edge for industrialization due to its high theoretical photocurrent density and solar-to-hydrogen conversion efficiency but is challenged by poor reaction kinetics and stability. Here, a conformal and superhydrophilic layer of phytic acid coordinated with nickel and iron (PA-NiFe) was in situ deposited on the surface of the BiVO4 photoanode via a facile interfacial coordination assembly strategy. The BiVO4@PA-NiFe photoanode achieved a high photocurrent density of 4.58 mA cm−2 and a surface charge separation efficiency of 84.5%, which are 3.23 and 1.91 times higher than those of the pristine BiVO4 photoanode, respectively. Moreover, the BiVO4@PA-NiFe photoanode exhibited excellent durability during a 6-hour stability assessment. The enhanced surface charge separation and the improved potential-limiting step during the oxygen evolution reaction contribute to improved photoelectrochemical performances. This work underscores a competitive strategy for developing metal–organic complexes to advance the development of efficient photoanodes.

Graphical abstract: Conformal coating of superhydrophilic nickel iron phytic acid complex to boost BiVO4 photoanode solar water oxidation

Supplementary files

Article information

Article type
Research Article
Submitted
18 Apr 2024
Accepted
16 Jun 2024
First published
17 Jun 2024

Inorg. Chem. Front., 2024,11, 5111-5119

Conformal coating of superhydrophilic nickel iron phytic acid complex to boost BiVO4 photoanode solar water oxidation

Z. Chen, B. Ge, J. Bao, J. Zhang, C. Yuan, H. Xu, W. Yang, Z. Qiu, X. Yang, X. Jiang, X. Wang, J. Zeng, B. Chen and C. Shi, Inorg. Chem. Front., 2024, 11, 5111 DOI: 10.1039/D4QI00989D

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