Unlocking Concerted Proton‐Electron Transfer in Cobalt Oxyhydroxide for Industrial‐Current Biomass Upgrading and Integrated Hydrogen Production
工業電流レベルでのバイオマス高付加価値化と統合水素製造に向けたコバルトオキシ水酸化物における協調的プロトン電子移動の解明 (AI 翻訳)
Jianyun Gan, Yunyi Yang, Wu Yang, Linxin Zhong, Yunpeng Liu, Zhongxin Chen, K. Ocakoğlu, E. Iwuoha, Bin Liu, Xinwen Peng
🤖 gxceed AI 要約
日本語
コバルトオキシ水酸化物(CoOOH)触媒によるグルコース酸化反応(GOR)の機構を解明。格子酸素機構から協調的プロトン電子移動への切り替えにより、酸素発生を抑制し、1.23 Vで100 mA cm⁻²の高電流密度と97.0%のギ酸ファラデー効率を達成。フロー電解槽で水素とギ酸を併産し、300 mA cm⁻²で100時間以上の安定動作を実現。
English
This study resolves the controversy over the mechanism of glucose electrooxidation on cobalt oxyhydroxide (CoOOH) by identifying a concerted proton-electron transfer (CPET) route that suppresses oxygen evolution. The catalyst achieves 100 mA cm⁻² at 1.23 V vs. RHE with 97.0% formate Faradaic efficiency. A flow electrolyzer co-produces formate and hydrogen at 300 mA cm⁻² with high stability for over 100 hours.
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
日本の水素基本戦略やグリーンイノベーションファンドと関連し、再生可能エネルギー由来の水素製造と化学品併産の可能性を示す。ただし、実用化にはさらなるスケールアップと経済性評価が必要。
In the global GX context
This work advances the global hydrogen economy by demonstrating an energy-efficient route for co-producing green hydrogen and value-added chemicals from biomass. It offers a potential pathway to reduce the energy consumption of electrolytic hydrogen production, aligning with net-zero targets.
👥 読者別の含意
🔬研究者:Provides mechanistic insight into CPET-dominated electrooxidation, offering a design principle for non-noble metal catalysts.
🏢実務担当者:Highlights a scalable electrolyzer design for co-producing formate and hydrogen, relevant for chemical and energy industries.
📄 Abstract（原文）
Cobalt oxyhydroxide (CoOOH) is a promising catalyst for biomass electrooxidation, yet its reaction mechanism remains contentious regarding its competition with the oxygen evolution reaction (OER) at high overpotentials. Herein, we resolve this controversy by identifying a key intermediate that triggers a switch from the lattice oxygen mechanism (LOM) for OER to a concerted proton–electron transfer (CPET) mechanism for the glucose oxidation reaction (GOR). Operando spectroscopy and isotope‐labeling experiments reveal that the electrochemically generated O–Co 4+ (O * )–O site preferentially extracts protons from glucose via CPET, which effectively suppresses O─O coupling and parasitic oxygen evolution. This mechanism enables CoOOH to achieve a high GOR current density of 100 mA cm − 2 at only 1.23 V vs. RHE with a formate Faradaic efficiency of 97.0%. Moreover, the two‐electrode flow electrolyzer integrating GOR with hydrogen evolution reaction achieves a current of 2.7 A (300 mA cm −2 ) at a low cell voltage of 1.70 V, co‐producing formate and hydrogen with high Faradaic efficiencies (87.5% and 98.4%, respectively), and maintaining stable operation for over 100 h. This work not only clarifies the CPET‐dominated mechanism in biomass electrooxidation but also proposes a scalable strategy for energy‑saving coproduction of valuable chemicals and green hydrogen.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1002/aenm.71253first seen 2026-07-13 07:03:04
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。