Edge-Site Co-N _x Model Single-Atom Catalysts for CO₂ Electroreduction

Cheng, Yao-Ti1; Peng, Jian-Zhao1; Lai, Guo-Tao1; Yue, Xian1; Li, Fu-Zhi1; Wang, Qing2; Chen, Li-Na3; Gu, Jun1

2024-05-15

10.1021/acscatal.4c02079

ACS CATALYSIS   影响因子和分区

2155-5435

Metal-nitrogen-carbon single-atom catalysts with metal sites at the edge of the carbon layers are widely used in electrocatalytic processes such as CO2 reduction. For the single-atom catalysts prepared with pyrolysis methods, the local structure of the metal sites, including the type of the ligands and the coordination number, cannot be precisely controlled, making it difficult to investigate the relationship between the electrocatalytic properties and the local structure. In this work, Co-N-x complexes with 2-4 pyridinic ligands are prepared and anchored at the edge of carbon black with conjugated pyrazine linkers as the model edge-site Co single-atom catalysts. Only the Co-N-4 catalyst shows high selectivity toward CO in CO2 electroreduction, with the turnover frequency 1 order of magnitude higher than that of Co-N-2 and Co-N-3 catalysts. Compared with Co-N-2 and Co-N-3 sites, the Co-N-4 site shows stronger adsorption of COOH and CO species and weaker adsorption of H2O and the H atom due to the low-spin electron configuration, which rationalizes the high CO2 reduction activity and low hydrogen evolution activity of the Co-N-4 catalyst.

edge site single-atom catalyst CO2 reduction electrolysis model catalyst

SCI ; EI

英语

第一 ; 通讯

Science and Technology Foundation of Shenzhen City[22272073] ; National Natural Science Foundation of China["JCYJ20210324104414039","JCYJ20220818100410023","KCXST20221021111207017"] ; Shenzhen Science and Technology Program[2021ZT09C064] ; Guangdong Grants[2021A1515110360]

Chemistry

Chemistry, Physical

WOS:001226133000001

AMER CHEMICAL SOC

Web of Science

1.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
2.Hokkaido Univ, Inst Catalysis, Sapporo 0010021, Japan
3.Harbin Inst Technol Shenzhen, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China

Cheng, Yao-Ti,Peng, Jian-Zhao,Lai, Guo-Tao,et al. Edge-Site Co-N _x Model Single-Atom Catalysts for CO₂ Electroreduction[J]. ACS CATALYSIS,2024,14(11).

Cheng, Yao-Ti.,Peng, Jian-Zhao.,Lai, Guo-Tao.,Yue, Xian.,Li, Fu-Zhi.,...&Gu, Jun.(2024).Edge-Site Co-N _x Model Single-Atom Catalysts for CO₂ Electroreduction.ACS CATALYSIS,14(11).

Cheng, Yao-Ti,et al."Edge-Site Co-N _x Model Single-Atom Catalysts for CO₂ Electroreduction".ACS CATALYSIS 14.11(2024).