Issue 20, 2024

Defective TiO2 composite photoanodes with surface-modified Prussian blue for efficient photoelectrochemical water splitting

Abstract

Solar hydrogen production has garnered significant attention in addressing the energy crisis due to its efficient and environmentally friendly nature. In this study, we successfully used a simple electrochemical reduction method to introduce oxygen vacancies on a TiO2 nanorod photoanode, termed defective TiO2 (D-TiO2). Meanwhile, Prussian blue (PB) was deposited on D-TiO2 to create a core–shell composite photoanode material. By optimizing the reduction time, the charge separation of D-TiO2 is improved. The addition of PB resulted in the formation of a II-type heterojunction between TiO2 and PB. The formation of the heterojunction enlarges the light absorption range of TiO2, increases the active sites, and reduces the recombination of photogenerated charges due to the large surface area of PB. The photocurrent density of D-TiO2@PB reaches 2.10 mA cm−2 at 1.23 V vs. RHE, with an enhanced IPCE of 35.8%.

Graphical abstract: Defective TiO2 composite photoanodes with surface-modified Prussian blue for efficient photoelectrochemical water splitting

Supplementary files

Article information

Article type
Paper
Submitted
19 Jul 2024
Accepted
15 Aug 2024
First published
16 Aug 2024

Catal. Sci. Technol., 2024,14, 5918-5924

Defective TiO2 composite photoanodes with surface-modified Prussian blue for efficient photoelectrochemical water splitting

L. Wang, R. Wang, L. Lai, W. Younas, G. Mao, L. Zhang and Q. Liu, Catal. Sci. Technol., 2024, 14, 5918 DOI: 10.1039/D4CY00895B

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