期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 638, 期 -, 页码 650-657出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2023.02.026
关键词
Ammonia electrosynthesis; Ambient conditions; Single atom electrocatalysis; Nitric oxide reduction reaction; Zn-NO battery
A high-performance catalyst made of single atomic Ce sites anchored on nitrogen-doped hollow carbon spheres has been developed. It can efficiently electrocatalyze the reduction of NO to NH3 in an acidic solution, achieving a maximal Faradaic efficiency of 91% and a yield rate of 1023 lg h-1 mgcat.-1. The catalyst outperforms Ce nanoclusters and shows good structural and electrochemical stability.
Electrocatalytic nitric oxide reduction reaction (NORR) at ambient environments not only offers a promis-ing strategy to yield ammonia (NH3) but also degrades the NO contaminant; however, its application depends on searching for high-performance catalysts. Herein, we present single atomic Ce sites anchored on nitrogen-doped hollow carbon spheres that are capable of electro-catalyzing NO reduction to NH3 in an acidic solution, achieving a maximal Faradaic efficiency of 91 % and a yield rate of 1023 lg h-1 mgcat.-1 at -0.7 V vs RHE for NH3 formation, both of which outperform these on Ce nanoclusters and approach the best-reported results. Meanwhile, the single atomic Ce catalyst shows good structural and electrochem-ical stability during the 30-h NO electrolysis. Furthermore, when the single atomic Ce catalyst was used as cathodic material in a proof-of-concept of Zn-NO battery, it delivers a maximal power density of 3.4 mW cm-2 and a high NH3 yield rate of 309 lg h-1 mgcat.-1. Theoretical simulations suggest that the Ce-N4 active moiety can not only activate NO molecules via a strong electronic interaction but also reduce the free energy barrier of *NO transition to *NOH intermediate as the limiting step, and therefore boosting the NORR kinetics and suppressing the competitive hydrogen evolution. (c) 2023 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据