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Multi‐Energy‐State Covalent Organic Framework/Sulfur‐Vacancy‐Engineered Mn 0.2 Cd 0.8 S S‐Scheme Photocatalyst for Enhanced Light Harvesting and H 2 O 2 Generation

多エネルギー状態共有共有有機骨格／硫黄空孔工学Mn₀.₂Cd₀.₈S Sスキーム光触媒による光捕集とH₂O₂生成の向上 (AI 翻訳)

Chunguang Chen, Zhongliao Wang, Jinfeng Zhang, Kai Dai, Jianjun Zhang, Liuyang Zhang

Advances in Materials📚 査読済 / ジャーナル2026-05-08#その他Origin: CN
DOI: 10.1002/adma.73326
原典: https://doi.org/10.1002/adma.73326

🤖 gxceed AI 要約

日本語

本論文は、トリアジン系共有結合有機骨格（COF）と硫黄空孔リッチなMn₀.₂Cd₀.₈S（Sv-MCS）を統合したSスキーム光触媒の構築を報告する。この二機能設計により、COFのn→π*電子遷移とSv-MCSの欠陥状態吸収を維持し、純水中で5389.6 µmol·h⁻¹·g⁻¹のH₂O₂生成率を達成した。Cd-O配位結合とSスキーム電荷移動によりキャリア再結合が抑制され、2電子還元経路が進行することを明らかにした。

English

This paper reports an S-scheme photocatalyst integrating a triazine-based covalent organic framework (COF) with sulfur-vacancy-rich Mn0.2Cd0.8S (Sv-MCS). The dual design preserves intrinsic electronic transitions and defect-state absorption, achieving an exceptional H2O2 production rate of 5389.6 µmol·h⁻¹·g⁻¹ in pure water. Interfacial Cd-O coordination and S-scheme charge transfer suppress carrier recombination, favoring a two-electron oxygen reduction pathway.

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

本研究成果は、H₂O₂（グリーン酸化剤）のクリーン合成法として脱炭素化学プロセスに寄与し得る。ただし、材料科学的な基礎研究であり、日本のGX政策や企業実務への直接的な示唆は限定的。

In the global GX context

This work advances solar-driven H2O2 production, a sustainable alternative for green oxidants. The S-scheme heterojunction design principles could inspire further developments in artificial photosynthesis and clean chemical manufacturing, contributing to global decarbonization of industrial processes.

👥 読者別の含意

🔬研究者:Materials scientists and photocatalysis researchers can leverage the S-scheme design strategy and mechanistic insights for developing efficient H2O2 evolution systems.

📄 Abstract（原文）

Hydrogen peroxide (H 2 O 2 ) is an essential green oxidant with broad industrial relevance. Photocatalytic oxygen reduction reaction (ORR) offers a sustainable method for producing oxygen, yet its efficiency is limited by poor charge separation and severe carrier recombination. Single‐component photocatalysts suffer from sluggish carrier dynamics, while multi‐energy‐state systems frequently experience recombination at intermediate states. S‐scheme heterojunction engineering offers an effective strategy to address these challenges by regulating interfacial charge transfer while preserving strong redox potentials. Here, we report the construction of an S‐scheme photocatalyst by integrating a triazine‐based covalent organic framework (COF) with sulfur‐vacancy‐rich Mn 0.2 Cd 0.8 S (Sv‐MCS). This dual‐functional design preserves both the intrinsic n→π* electronic transitions of the COF and defect‐state absorption of Sv‐MCS, delivering an exceptional H 2 O 2 production rate of 5389.6 µmol·h −1 ·g −1 in pure water. Concurrently, the photostability of the catalyst is simultaneously enhanced. X‐ray absorption fine‐structural analysis confirms interfacial Cd–O coordination between Cd atoms and COF carbonyl groups. In situ spectroscopies combined with density functional theory elucidate a preferential two‐electron ORR pathway, while femtosecond transient absorption spectroscopy confirms suppressed carrier recombination enabled by synergistic S‐scheme charge transfer and interfacial chemical bonding. This work establishes design principles for multi‐energy‐state S‐scheme photocatalysts and advances solar‐driven H 2 O 2 production toward artificial photosynthesis.

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