Directed Substitutional Control Unlocks Intrinsic Water Oxidation and Reduction Activity in an Oxyhalide Photocatalyst

Yudai Furuta; Hajime Suzuki; Yusuke Ishii; Osamu Tomita; Akinobu Nakada; Daichi Kato; Shunsuke Nozawa; Takashi Tachikawa; Akinori Saeki; Hiroshi Kageyama; Ryu Abe

doi:10.1021/acs.chemmater.5c03348

journal article·2026-04-28

Directed Substitutional Control Unlocks Intrinsic Water Oxidation and Reduction Activity in an Oxyhalide Photocatalyst

Yudai Furuta, Hajime Suzuki, Yusuke Ishii, Osamu Tomita, Akinobu Nakada, Daichi Kato, Shunsuke Nozawa, Takashi Tachikawa, Akinori Saeki, Hiroshi Kageyama, Ryu Abe

Chemistry of Materials· Volume 38· Issue 8

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Source abstract

Abstract

To realize highly optimized properties and performance of semiconductor photocatalysts, precise control over their composition and the site occupancy of multiple cations and anions is essential. This study demonstrates that Bi 2 YO 4 Cl, a multicationic oxyhalide photocatalyst, exhibits markedly higher activity when isovalent Bi-for-Y substitution is suppressed by simply controlling the precursor stoichiometry. The flux synthesis of Bi 2 YO 4 Cl under stoichiometric conditions induces the partial substitution of Bi 3+ into Y 3+ sites, creating localized states near the valence band maximum, which act as hole traps and hinder efficient charge carrier utilization. Using an excess of Y 2 O 3 during the synthesis suppresses the undesired Bi-for-Y substitution, leading to markedly higher H 2 and O 2 evolution rates under visible-light irradiation. This study highlights the critical importance of precise cation placement for maximizing the photocatalytic performance of multicationic photocatalysts.

Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials Catalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Ammonia Synthesis and Nitrogen Reduction

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan

Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

Photon Factory (PF)

Institute of Materials Structure Science (IMSS), High Energy Accelerator Research Organization (KEK)

Molecular Photoscience Research Center, Kobe University, 1-1 Rokkodai-cho, Kobe 657-8501, Japan

Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan

Funding

Kobe University · Ministry of Education, Culture, Sports, Science and Technology · Samco Foundation

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