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Hierarchically Porous SnO2 Coupled Organic Carbon for CO2 Electroreduction.

Converting CO2 into value-added chemicals or fuels by electrochemical CO2 reduction reaction (CO2RR) has aroused great interest, while designing highly active and selective electrocatalysts is still a challenge. Herein, a novel kind of electrochemical catalyst composed with SnO2 and organic carbon (OC), named as SnO2/OC, was facilely constructed for CO2RR. The obtained SnO2/OC exhibits both high faradaic efficiency for formate (~75%) and carbon products (~95%) as well as excellent stability. High surface area with hierarchically porous structure and the homogeneous formation of Sn-O-C linkages in SnO2/OC jointly promote the adsorption and activation of CO2, as well as fast transport of reactants and products.