Nitrogen and Sulfur Co-doped Carbon Nanosheets for Electrochemical Reduction of CO2

Conversing CO2 into value-added chemicals endows electrochemical CO2 reduction reaction (CO2RR) with the potential to tackle over issues induced by the increased CO2 level in the atmosphere. The associated technological viability of this process is highly dependent on exploring efficient electrocatalysts. In this work, we successfully synthesized nitrogen and sulfur co-doped carbon nanosheets (NS-CNSs), which are comprehensively characterized by a variety of characterization techniques. When used as the catalyst for CO2RR, the NS-CNSs exhibit remarkably high catalytic activity and selectivity with a Faradaic efficiency of similar to 85.4 % for CO production and long-term durability. The superior performance of this material majorly originates from the unique nanosheets structure with large porosity and the co-doped S and N in the nanosheets, which exposed larger electrochemical activity surface areas and more active sites for promoting CO2 reduction.