过电位
电催化剂
材料科学
介孔材料
法拉第效率
煅烧
化学工程
选择性
电极
纳米技术
电化学
碳纤维
催化作用
化学
复合材料
有机化学
复合数
工程类
物理化学
作者
Fengwang Li,Lu Chen,Gregory P. Knowles,Douglas R. MacFarlane,Jie Zhang
标识
DOI:10.1002/anie.201608279
摘要
Abstract Electrochemical reduction of CO 2 into liquid fuels is a promising approach to achieve a carbon‐neutral energy cycle. However, conventional electrocatalysts usually suffer from low energy efficiency and poor selectivity and stability. A 3D hierarchical structure composed of mesoporous SnO 2 nanosheets on carbon cloth is proposed to efficiently and selectively electroreduce CO 2 to formate in aqueous media. The electrode is fabricated by a facile combination of hydrothermal reaction and calcination. It exhibits an unprecedented partial current density of about 45 mA cm −2 at a moderate overpotential (0.88 V) with high faradaic efficiency (87±2 %), which is even larger than most gas diffusion electrodes. Additionally, the electrode also demonstrates flexibility and long‐term stability. The superior performance is attributed to the robust and highly porous hierarchical structure, which provides a large surface area and facilitates charge and mass transfer.
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