Aliovalent metal cation doping of La5Ti2AgO7S5 particles for improved photocatalytic and photoelectrochemical water splitting

Yosuke Kageshima; Shiino Otsuka; Ryunosuke Iwaya; Haruto Yonehara; Katsuya Teshima; Kazunari Domen; Hiromasa Nishikiori

doi:10.1039/D4CC04269G

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Aliovalent metal cation doping of La₅Ti₂AgO₇S₅ particles for improved photocatalytic and photoelectrochemical water splitting†

Yosuke Kageshima,

*^ab Shiino Otsuka,^a Ryunosuke Iwaya,^a Haruto Yonehara,^a Katsuya Teshima,

^ab Kazunari Domen

^bc and Hiromasa Nishikiori

*^ab

Author affiliations

* Corresponding authors

^a Department of Materials Chemistry, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380–8553, Japan
E-mail: kage_ysk@shinshu-u.ac.jp, nishiki@shinshu-u.ac.jp

^b Research Initiative for Supra-Materials (RISM), Shinshu University, 4–17-1 Wakasato, Nagano 380–8553, Japan

^c Office of University Professors, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

Abstract

The doping of photocatalytic La₅Ti₂AgO₇S₅ particles with aliovalent metal cations was investigated. The incorporation of lower-valence Al³⁺ cations at Ti⁴⁺ sites improved the photocatalytic hydrogen evolution activity. In addition, the anodic photocurrent during oxygen evolution was increased upon adding higher-valence Ta⁵⁺ ions. The effect of doping on the carrier density in the photocatalytic particles was also examined in this work.

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Article information

DOI: https://doi.org/10.1039/D4CC04269G
Article type: Communication
Submitted: 21 Aug 2024
Accepted: 14 Oct 2024
First published: 17 Oct 2024
This article is Open Access

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Chem. Commun., 2024,60, 13059-13062

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Aliovalent metal cation doping of La₅Ti₂AgO₇S₅ particles for improved photocatalytic and photoelectrochemical water splitting

Y. Kageshima, S. Otsuka, R. Iwaya, H. Yonehara, K. Teshima, K. Domen and H. Nishikiori, Chem. Commun., 2024, 60, 13059 DOI: 10.1039/D4CC04269G

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Chemical Communications