采用碳质反应层的气体扩散阴极在流动电解槽中锂介导的氮还原

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2025-03-13 DOI:10.1021/acsaem.5c0000810.1021/acsaem.5c00008

Wei Bi, Wenbo Bao, Elod L. Gyenge* and David Pentreath Wilkinson*,

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引用次数: 0

摘要

锂介导的氮还原（LNRR）有望实现可持续的NH3生产，但结合气体扩散电极（GDEs）的流动电解槽很少被研究用于这一应用。本研究利用廉价的碳质反应层，在脉冲电流下实现稳定和活跃的NH3电合成，时间超过8小时。特别是，在- 5 mA cm-2下，非晶C45比Vulcan、Vulcan支撑的Pt和石墨SFG6L表现出更好的耐久性。用聚偏氟乙烯代替Nafion作为粘结剂，提高了NH3产率（3.11±0.41 μmol h-1 cm-2）和法拉第效率（5.0±0.65%），优于现有的无贵金属阴极。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Lithium-Mediated Nitrogen Reduction in a Flow Electrolyzer Cell Using a Gas-Diffusion Cathode with Carbonaceous Reaction Layers

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Lithium-Mediated Nitrogen Reduction in a Flow Electrolyzer Cell Using a Gas-Diffusion Cathode with Carbonaceous Reaction Layers

Lithium-mediated nitrogen reduction (LNRR) shows promise for sustainable NH₃ production, but flow electrolyzers incorporating gas-diffusion electrodes (GDEs) have rarely been studied toward this application. This work investigates cathode GDEs using inexpensive carbonaceous reaction layers to achieve stable and active NH₃ electrosynthesis for over 8 h under pulsed currents. Particularly, the amorphous C45 demonstrates superior durability over Vulcan, Vulcan-supported Pt, and graphitic SFG6L at −5 mA cm^–2. Replacing Nafion with polyvinylidene fluoride as the binder improves the NH₃ production rate (3.11 ± 0.41 μmol h^–1 cm^–2) and Faradaic efficiency (5.0 ± 0.65%), outperforming prior precious-metal-free cathode results.

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.