关键字：REDUCTION
摘要：Electrochemical CO2 reduction to syngas (CO + H2) offers a promising way to produce valuable chemicals and fuels from renewable electricity and capture CO2, but developing efficient, tunable catalysts to control the syngas ratio remains challenging. Herein, we demonstrated the rational design of bimetallic Ni/Co single-atom catalysts for efficient, tunable CO2 electroreduction to syngas. The adsorption energy descriptor was introduced to identify optimal metal-N4 sites for CO2 electroreduction, highlighting Ni-N4 and Co-N4 as promising candidates. Isolated Ni and Co atoms were precisely anchored into nitrogen-doped carbon supports, forming Ni/Co-N4 active sites. Mechanistic insights revealed that atomic Ni-N4 sites selectively adsorbed and activated CO2 to form CO, while Co-N4 sites bound H2O to facilitate hydrogen evolution. This synergy between Co/Ni single-atom sites enabled high faradaic efficiency and a tunable CO/H2 ratio from 1 : 2.3 to 2.8 : 1. This research offers strategies for designing single-atom catalysts to achieve precise product selectivity control over energy-related applications.
卷号：12
期号：7
是否译文：否