スカンジウムドーピングによるチタン酸ストロンチウムの光触媒全水分解の高性能化
Scandium Doping Enhanced Photocatalytic Overall Water Splitting over Strontium Titanate (原題)
Zheng Hanyue, Lv Gongxuan
🤖 gxceed AI 要約
日本語
本研究は、ScドープSrTiO3光触媒により、365nmで95.11%の量子効率を達成し、水素生成速度6.32mmol/h/gを実現。ScドープがTi3+欠陥を補償し、(100)面の露出を促進、コ触媒の選択的担持により活性が向上した。再生可能水素製造の高効率化に貢献する。
English
This study demonstrates that Sc-doped SrTiO3 photocatalyst achieves an apparent quantum efficiency of 95.11% at 365 nm and a hydrogen evolution rate of 6.32 mmol/h/g under full-spectrum irradiation. Sc doping compensates Ti3+ defects and promotes (100) facet exposure, enabling selective cocatalyst deposition and efficient charge separation, significantly enhancing overall water splitting for renewable hydrogen production.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の水素社会実現に向けた再生可能水素製造技術の基盤研究として重要。将来的なグリーン水素コスト低減に寄与する可能性があり、水素基本戦略やGX政策と関連。
In the global GX context
This fundamental research contributes to the global push for renewable hydrogen production, aligning with international decarbonization targets. High quantum efficiency in photocatalytic water splitting could lower green hydrogen costs, supporting global energy transition efforts.
👥 読者別の含意
🔬研究者:光触媒水分解の高効率化メカニズムに関する新知見を提供し、今後の材料設計に示唆を与える。
🏢実務担当者:水素製造技術の開発に関わる企業は、将来的なグリーン水素生産コスト低減の可能性を評価できる。
🏛政策担当者:再生可能水素の技術開発支援政策を検討する際の参考となる。
📄 Abstract（原文）
Efficient photocatalytic overall water splitting represents one of the most promising routes for renewable hydrogen production. The realization of this process critically depends on the development of photocatalysts with high activity and stability. In recent years, substantial progress has been made in enhancing the performance of SrTiO3-based photocatalysts. Nevertheless, the quantum efficiency of most SrTiO3-based systems at 375 nm remains limited to approximately 45%. In this work, scandium was introduced into SrTiO3 via a solid-state synthesis method, followed by the construction of Rh-Cr-Co composite cocatalysts through a photodeposition process. The as-prepared photocatalyst achieved overall water splitting under Xe-lamp irradiation at ambient pressure in the absence of Al. The apparent quantum efficiency (AQE) reached 95.11% at 365 nm and 75.46% at 375 nm. Under full-spectrum irradiation, the optimal catalyst exhibited a hydrogen evolution rate of 6.32 mmol·h−1·g−1. The results reveal that Sc doping partially compensates Ti3+ defect sites and induces the formation of additional surface hydroxyl groups, which promotes the preferential exposure of (100) facets of SrTiO3. This structural modulation facilitates the selective photodeposition of Rh@Cr2O3 and CoOOH on the (100) and (110) facets of SrTiO3, respectively. Such spatially selective distribution of cocatalysts effectively separates the hydrogen evolution and oxygen evolution active sites, thereby significantly enhancing the photocatalytic activity for overall water splitting.
🔗 Provenance — このレコードを発見したソース
- scidb https://doi.org/10.57760/sciencedb.00zrwfirst seen 2026-08-27 06:07:39 · last seen 2026-09-16 05:43:29
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