Membrane electrode assembly reactor offers great promise toward practical CO_(2)electrolysis.Unfortunately,traditional proton exchange membrane possesses strong acidic chemical environment,which facilitates undesired ...Membrane electrode assembly reactor offers great promise toward practical CO_(2)electrolysis.Unfortunately,traditional proton exchange membrane possesses strong acidic chemical environment,which facilitates undesired hydrogen evolution reaction.Here we report a proton antagonist strategy,through which the proton diffusion pathways have been severely impeded by Na+cation to produce an alkaline-rich environment.With this new membrane electrode assembly,we can significantly suppress the hydrogen evolution and achieve a Faradaic efficiency of 95.7%for CO with 51.5%energy efficiency.In addition,our proton antagonist membrane outperforms the commercial anion exchange membrane in both conductivity and oxidation resistance lifetime,which are crucial for large scale electrolysis of carbon neutral chemicals.展开更多
基金supported by the National Natural Science Foundation of China(Nos.21771040,62074043,and 11705152)the National Key Research and Development Program of China(No.2017YFA0207303)the Yiwu Research Institute Program of Fudan University(20-1-04).
文摘Membrane electrode assembly reactor offers great promise toward practical CO_(2)electrolysis.Unfortunately,traditional proton exchange membrane possesses strong acidic chemical environment,which facilitates undesired hydrogen evolution reaction.Here we report a proton antagonist strategy,through which the proton diffusion pathways have been severely impeded by Na+cation to produce an alkaline-rich environment.With this new membrane electrode assembly,we can significantly suppress the hydrogen evolution and achieve a Faradaic efficiency of 95.7%for CO with 51.5%energy efficiency.In addition,our proton antagonist membrane outperforms the commercial anion exchange membrane in both conductivity and oxidation resistance lifetime,which are crucial for large scale electrolysis of carbon neutral chemicals.
