【摘 要】
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The electrochemical reduction of CO2 is a promising solution for sustainable energy research and car-bon emissions.However,this solution has been challenged by
【机 构】
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Tianjin Key Lab of Indoor Air Environmental Quality Control,School of Environmental Science and Engi
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The electrochemical reduction of CO2 is a promising solution for sustainable energy research and car-bon emissions.However,this solution has been challenged by the lack of active and selective catalysts.Here,we report a two-step synthesis of 3D ordered mesoporous Cu sphere arrays,which is fabricated by a dual template method using a poly methyl methacrylate (PMMA) inverse opal and the nonionic surfactant Brij 58 to template the mesostructure within the regular voids of a colloidal crystal.There-fore,the well-ordered 3D interconnected bi-continuous mesopores structure has advantages of abundant exposed catalytically active sites,efficient mass transport,and high electrical conductivity,which result in excellent electrocatalytic CO2 RR performance.The prepared 3D ordered mesoporous Cu sphere array(3D-OMCuSA) exhibits a low onset potential of-0.4V at a 1 mA cm-2 electrode current density,a low Tafel slope of 109.6 mV per decade and a long-term durability in 0.1 M potassium bicarbonate.These distinct features of 3D-OMCuSA render it a promising method for the further development of advanced electrocatalytic materials for CO2 reduction.
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