An efficient 3D ordered mesoporous Cu sphere array electrocatalyst for carbon dioxide electrochemical reduction

• 作者: Jun-Tao Luo Guo-Long Zang Chuang Hu
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2020,（20）
• 页码范围: 95-106
• 页数: 12页
• 语种: 英文

摘要

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.