自己支持型カーボンナノチューブ/カーボンクロス複合体上のCu-Co二元活性サイトによる硝酸塩の電気化学的アンモニア還元の高効率化
Synergistic Cu–Co dual sites on self-supporting carbon nanotube/carbon cloth composites for efficient electrocatalytic nitrate reduction to ammonia (原題)
Chenhao Kong, Li Jia, Keke Xu, Zihan Wang, Suqian Zhao, Jiahao Zhou, Xianguang Meng, Guifu Zuo
🤖 gxceed AI 要約
日本語
本研究は、硝酸塩の電気化学的還元によるアンモニア合成（NO₃RA）のためのCu-Co二元金属酸化物触媒を開発した。CuとCoの相乗効果により、硝酸塩の吸着・活性化と活性水素の供給が促進され、アンモニア選択性と安定性が向上した。最適化された触媒は、高いファラデー効率（91.2%）とアンモニア生成速度（17.54 mg·h⁻¹·mgcat⁻¹）を達成し、優れたサイクル安定性を示した。この研究は、多活性サイトの相乗メカニズムの理解と、高活性・高分散・高安定なNO₃RA電極触媒の設計戦略を提供する。
English
This study develops Cu-Co bimetallic oxide catalysts for electrocatalytic nitrate reduction to ammonia (NO3RA). The synergistic effect between Cu and Co dual sites enhances nitrate adsorption/activation and active hydrogen supply, improving ammonia selectivity and stability. The optimized catalyst achieves a high Faradaic efficiency of 91.2% and an ammonia yield rate of 17.54 mg·h-1·mgcat-1, with excellent cycling stability. This work provides insights into the synergistic mechanism of multi-active sites and a design strategy for highly active, well-dispersed, and stable NO3RA electrocatalysts.
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、アンモニアを水素キャリアや燃料として活用する日本の水素社会実現に向けた技術的基盤に寄与する可能性がある。特に、再生可能エネルギー由来の電力を用いたグリーンアンモニア合成は、日本のエネルギー転換政策（水素基本戦略など）と関連し、将来的な産業応用が期待される。
In the global GX context
This research contributes to the global effort in green ammonia production, which is a key component of the hydrogen economy and decarbonization strategies. The development of efficient electrocatalysts for nitrate reduction to ammonia offers a pathway for sustainable ammonia synthesis using renewable electricity, aligning with global climate goals and the transition to low-carbon energy systems.
👥 読者別の含意
🔬研究者:Provides insights into the synergistic mechanism of Cu-Co dual sites for electrocatalytic nitrate reduction, offering a design strategy for high-performance NO3RA catalysts.
🏢実務担当者:Potentially relevant for companies in the chemical or energy sector exploring green ammonia production technologies, though practical application is still in early stages.
🏛政策担当者:May inform policies supporting research and development in green ammonia synthesis as part of broader decarbonization and hydrogen strategies.
📄 Abstract（原文）
Abstract Electrocatalytic nitrate reduction to ammonia (NO₃RA) has attracted considerable interest owing to its potential for nitrogen resource conversion and energy storage under mild conditions. However, this process still faces challenges such as low ammonia selectivity and poor catalyst stability. In this work, a series of m-CuO/Co₃O₄ bimetallic oxide electrocatalysts supported on self-supporting carbon nanotube/carbon cloth composites (CNTC) were prepared and their NO₃RA performance was systematically investigated. A significant synergistic effect exists between the Cu and Co dual active sites: Cu species adsorb and activate NO₃⁻ to NO₂⁻, while Co species provide active hydrogen (H*) and promote the further reduction of NO₂⁻ to NH₃. In the CuO/Co₃O₄ composite, the two components may synergistically influence the electronic structure, thereby avoiding the issues of Cu‑induced excessive nitrite adsorption leading to catalyst deactivation, as well as Co‑induced low intrinsic activity and severe competing hydrogen evolution. Furthermore, the CNTC support can promote the dispersion of active components, expose more active sites, and improve ammonia synthesis efficiency. The optimized 0.67-CuO/Co₃O₄@CNTC catalyst achieves a maximum Faradaic efficiency of 91.2% for NH₃ at -0.4 V vs. RHE, along with an ammonia yield rate of 17.54 mg·h-1·mgcat-1, while keeping the nitrite concentration at a relatively low level and exhibiting excellent cycling stability. Overall, this study provides insights into the possible synergistic mechanism of multi-active sites and offers a design strategy and experimental foundation for developing highly active, well-dispersed, and stable NO₃RA electrocatalysts.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1088/1361-6463/ae9c51first seen 2026-08-22 05:03:00
🔔 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。