Mass-Transfer-Enhanced Hydrophobic Bi Microsheets for Highly Efficient Electroreduction of Co2 to Pure Formate in a Wide Potential Window

作     者：Zhang, Yong Zhang, Rui Chen, FeiFei Zhang, FeiFei Liu, Yingda Hao, Xiaoya Jin, Haokun Zhang, Xinghua Lu, Zunming Dong, Hong Lu, Feng Wang, Weihua Liu, Hui Liu, Hui Cheng, Yahui 

作者机构：Department of Electronic Science and Engineering Tianjin Key Laboratory of Process Control and Green Technology for Pharmaceutical Industry Nankai University Tianjin300350 China School of Material Science and Engineering Hebei University of Technology Tianjin300130 China Research Group of Quantum-Dot Materials & Devices Institute of New-Energy Materials Tianjin University Tianjin300350 China 

出 版 物：《SSRN》 

年 卷 期：2022年

核心收录：

主　　题：Carbon dioxide 

摘      要：The industrial application of electrochemical CO2 reduction reaction is challenged by the limited mass transfer and the mixing of products with traditional electrolytes. Here, we proposed an in-situ electroreduction strategy to construct hydrophobic Bi microsheets with (012) plane orientation and abundant grain boundaries to solve these problems and maintain high intrinsic activity. The large distance between microsheets and the stable micro-sized hydrophobic structure can trap more air and form smaller solid-liquid interface to stably improve CO2 mass transfer. The obtained Bi microsheets exhibited high activity and selectivity in a wide potential window. In an H-type cell, the selectivity of formate exceeds 90% over a potential range of -0.8 V to -1.3 V vs. RHE. The pure formate solution was produced using a CO2 reduction cell with solid-state electrolyte to simplify product separation, and 0.13 M pure formate solution was continuously and stably produced for 110 h at 160 mAcm-2 . © 2022, The Authors. All rights reserved.