Tin‐doped bismuth dendrites for highly efficient electrocatalytic reduction of CO2 by using bipolar membrane in ultrathin liquid reactor
Luwei Peng,
Changsheng Chen,
Ruinan He,
Nengneng Xu,
Jinli Qiao,
Zezhou Lin,
Ye Zhu,
Haitao Huang
Affiliations
Luwei Peng
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering, Donghua University Shanghai China
Changsheng Chen
Department of Applied Physics and Research Institute for Smart Energy Hong Kong Polytechnic University Kowloon Hong Kong, China
Ruinan He
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering, Donghua University Shanghai China
Nengneng Xu
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering, Donghua University Shanghai China
Jinli Qiao
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering, Donghua University Shanghai China
Zezhou Lin
Department of Applied Physics and Research Institute for Smart Energy Hong Kong Polytechnic University Kowloon Hong Kong, China
Ye Zhu
Department of Applied Physics and Research Institute for Smart Energy Hong Kong Polytechnic University Kowloon Hong Kong, China
Haitao Huang
Department of Applied Physics and Research Institute for Smart Energy Hong Kong Polytechnic University Kowloon Hong Kong, China
Abstract Electrochemical CO2 reduction reaction is a promising protocol to achieve a carbon‐neutral cycle. Herein, we report a general strategy to regulate the growth of Sn‐doped Bi dendritic electrode with numerous labyrinthine and porous channels to provide abundant tips, edges, terraces, and low coordination sites for efficient conversion of CO2 into formate. As a result, the dendritic Sn‐doped Bi achieves a high partial current density (30 mA/cm2), a high Faradic efficiency of formate (95.5%), and a long‐term durability (>60 h). Most remarkably, the self‐made bipolar membrane can effectually prohibit the cross‐over of formate from cathode to anode and the oxidization of small organic molecules in anode can promote the production of formate on both anode and cathode sides. This work provides helpful insights to the design of electrocatalysts, bipolar membrane, and ultrathin liquid reactor.
