构建 W1-Zn 双核位点，促进亚硝酸盐电还原成氨

IF 13.1 1区化学 Q1 Energy

Journal of Energy Chemistry Pub Date : 2024-11-13 DOI:10.1016/j.jechem.2024.10.054

Zhuohang Li , Ying Zhang , Xiang Li , Ruizhi Liang , Ye Tian , Ke Chu

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引用次数: 0

摘要

亚硝酸盐电还原为氨（NO2RR）被认为是实现可再生 NH3 生产和清除废弃 NO2- 的一种有吸引力的方法。本文开发了单分散掺杂 W 的氧化锌（W1-ZnO），作为一种高效的 NO2RR 催化剂。理论模拟和原位光谱测量揭示了 W1-ZnO 的 NO2RR 增强特性源于活性 W1-Zn 二核位点的产生，它能选择性地激活 NO2-，增强 NO2-到 NH3 途径的质子化能量，同时排斥竞争性的 H2 演化。引人注目的是，在流动池中装备的 W1-ZnO 显示出令人印象深刻的 NO2RR 性能，NH3 产率达到 970 μmol h-1 cm-2，NH3-Faradaic 效率达到 94.5%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Construction of W1-Zn dinuclear sites to boost nitrite electroreduction to ammonia

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Construction of W1-Zn dinuclear sites to boost nitrite electroreduction to ammonia

Electroreduction of nitrite to ammonia (NO₂RR) is recognized as an appealing method for achieving renewable NH₃ production and waste NO₂⁻ removal. Herein, monodispersed W-doped ZnO (W₁-ZnO) is developed as an efficient NO₂RR catalyst. Theoretical simulations and in situ spectroscopic measurements unravel that the enhanced NO₂RR property of W₁-ZnO originates from the creation of active W₁-Zn dinuclear sites to selectively activate NO₂⁻ and enhance the protonation energetics of NO₂⁻-to-NH₃ pathway, whilst repelling the competing H₂ evolution. Strikingly, W₁-ZnO equipped in flow cell shows an impressive NO₂RR performance with NH₃ yield rate of 970 μmol h⁻¹ cm⁻² and NH₃-Faradaic efficiency of 94.5%.

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来源期刊

Journal of Energy Chemistry CHEMISTRY, APPLIED-CHEMISTRY, PHYSICAL

CiteScore

19.10

自引率

8.40%

发文量

3631

审稿时长

15 days

期刊介绍： The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies. This journal focuses on original research papers covering various topics within energy chemistry worldwide, including: Optimized utilization of fossil energy Hydrogen energy Conversion and storage of electrochemical energy Capture, storage, and chemical conversion of carbon dioxide Materials and nanotechnologies for energy conversion and storage Chemistry in biomass conversion Chemistry in the utilization of solar energy