硝酸电还原高效氨协同Ag/Co(OH)2复合材料的构建

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2025-10-12 DOI:10.1021/acsami.5c17312

Jingyi Xu,Ruixiang Ge,Congcong Jian,Jincheng Zhang,Meijia Ding,Zhanning Liu,Min Ma

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引用次数: 0

摘要

开发高效的硝酸还原反应（NO3RR）制氨电催化剂具有重要意义。本文采用电沉积和液相沉积两种方法制备了银纳米粒子修饰的Co(OH)2催化剂。与Co(OH)2相比，Ag/Co(OH)2复合材料的NO3RR性能得到了显著提高，在中性介质中-0.6 V下获得了较高的NH3 FE，产率为97.1 μmol h-1 cm-2，收率为95.6%。综合表征证实了Ag和Co(OH)2之间的强界面耦合，而电化学研究表明协同效应同时增强了硝酸盐吸附和适度的氢吸附。提出了这样一种可能的NO3RR串接机制，其中Ag在初始2e-途径（*NO3→*NO2）中占主导地位，而Co(OH)2在随后的*NO加氢成*NH3中占优先地位。这项工作为电化学NO3RR的复合材料设计提供了一种新的催化剂和基础见解。

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Construction of a Synergistic Ag/Co(OH)2 Composite for Efficient Nitrate Electroreduction to Ammonia.

Developing efficient electrocatalysts for the nitrate reduction reaction (NO3RR) to produce ammonia is of great significance. In this work, a Ag nanoparticle-modified Co(OH)2 catalyst was prepared by electrodeposition and liquid-phase deposition. The Ag/Co(OH)2 composite exhibits significantly enhanced NO3RR performance in comparison with Co(OH)2, achieving a high NH3 FE and a yield rate of 95.6% and 97.1 μmol h-1 cm-2 at -0.6 V in a neutral medium. Comprehensive characterizations confirm the strong interfacial coupling between Ag and Co(OH)2, while electrochemical studies reveal synergistic effects that simultaneously enhance nitrate adsorption and moderate hydrogen adsorption. Such a probable NO3RR tandem mechanism is proposed in which Ag dominates the initial 2e- pathway (*NO3→*NO2) and Co(OH)2 was prior in the subsequent *NO hydrogenation into *NH3. This work provides both a novel catalyst and fundamental insights into the composite material design for electrochemical NO3RR.

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.