Electrocatalytic nitrite reduction to ammonia on an Rh single-atom catalyst

被引:25
|
作者
Xiang, Jiaqi [1 ]
Zhao, Hongyan [1 ]
Chen, Kai [1 ]
Yang, Xing [1 ]
Chu, Ke [1 ]
机构
[1] Lanzhou Jiaotong Univ, Sch Mat Sci & Engn, Lanzhou 730070, Peoples R China
关键词
Electrocatalytic NO2 reduction to NH3; Single atom catalysts; Flow cell electrolyzer; Theoretical calculations; BORON-NITRIDE; ELECTROREDUCTION;
D O I
10.1016/j.jcis.2024.01.013
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Electrocatalytic NO2- reduction to NH3 (NO2RR) holds great promise as a green method for high-efficiency NH3 production. Herein, an Rh single-atom catalyst where isolated Rh supported on defective BN nanosheets (Rh-1/ BN) is reported to exhibit the exceptional NO2RR activity and selectivity. Extensive experimental and theoretical studies unveil that the high NO2RR performance of Rh-1/BN arises from the single-atom Rh sites, which not only promote the activation and hydrogenation of NO2-to-NH3 process, but also hamper the undesired hydrogen evolution. Consequently, Rh-1/BN assembled in a flow cell exhibits the highest NH3 yield rate of 2165.4 mu mol h(-1) cm(-2) and FENH3 of 97.83 % at a high current density of 355.7 mA cm(-2), ranking it the most efficient catalysts for NO2--to-NH3 conversion.
引用
收藏
页码:432 / 438
页数:7
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