摘要
Electrochemical CO_(2)reduction(ECR)is one of the most effective methods to obtain carbonaceous chemicals and reduce greenhouse gases passingly under the ambient condition.However,efficient electrocatalysts featured with high selectivity and stability are still lacking.A novel molecule-mediated Ag electrocatalyst with capped thiols is rationally designed for high-performance ECR.The thiol-capped and carbon-supported Ag nanostructures(Ag-TC)are formed by in situ electrochemical reduction from three-dimentional(3D)Ag-thiol metal-organic compound with cysteine as the anchor agent and carbon source.Ag-TC exhibits high selectivity and stability for CO_(2)conversion to CO(86.7%),which is more catalytically active than that of common Ag nanoparticles.The function of thiols for ECR is proved by replacing cysteine with alanine without thiol group.Meanwhile,alternatively replacing and removing the surface molecules on the Ag foil further demonstrate the effct of thiols.This work enlightens the promise of in situ construction method for molecule capped metal electrocatalyst towards selective and stable ECR.
基金
This work was supported by the National Natural Science Foundation of China(No.2210011636)
the Natural Science Foundation of Jiangsu Province(No.BK20210311)
China Postdoctoral Science Foundation(Nos.2021M691561 and 2021T140319)
Jiangsu Planned Projects for Postdoctoral Research Funds(No.2021K547C)
CAS Key Laboratory of Nano-Bio Interface(No.21NBI02)
the Fundamental Research Funds for the Central Universities(No.NS2021037).
