DOI码：

10.1002/adma.202104090

发表刊物：

ADVANCED MATERIALS

刊物所在地：

WEINHEIM

关键字：

CO; (2) reduction; electrocatalysis; joule heating; N species; single atom

摘要：

Carbon-supported single-atom catalysts (SACs) are extensively studied because of their outstanding activity and selectivity toward a wide range of catalytic reactions. Amidst its development, excess dopants (e.g., nitrogen) are always required to ensure the high loading content of SACs on the carbon support. However, the use of excess dopants is accompanied by formation of miscellaneous structures (particularly the uncoordinated N species) on catalysts, leading to adverse effects on their performance. Herein, the synthesis of carbon-supported Ni SACs with precisely controlled single-atom structure via joule heating strategy, showing the coordination of 80% of N dopants with metal elements, is reported. The preclusion of the unfavorable N species is confirmed to be the main reason for the superior performance of optimized Ni SACs in electrocatalytic carbon dioxide reduction reaction, which demonstrates unprecedented activity, selectivity, and stability under an exceptionally broad voltage range (>92% CO selectivity in the range of -0.7 to -1.9 V reversible hydrogen electrode). Such a synthetic strategy is further applicable for the design of SACs with various metals. This work demonstrates a facile method for preclusion of unfavorable dopants in the SACs and its importance in catalytic application.

合写作者：

Xi, Dawei, Jiayi, Low, Jingxiang, Mao, Keke, Long, Ran, Jiawei, Dai, Zehui, Shao, Tianyi, Zhong, Yuan, Yu, Li, Zibiao, Loh, Xian Jun, Li Song, Ye, Enyi, Xiong, Yujie

第一作者：

Xi, Dawei

通讯作者：

Long, R, Xiong, YJ

论文编号：

WOS:000694990700001

文献类型：

Article

卷号：

34

期号：

25

页面范围：

-

ISSN号：

0935-9648

是否译文：

否