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Carbon Dioxide Valorization via Formate Electrosynthesis in a Wide Potential Window

机译:Carbon Dioxide Valorization via Formate Electrosynthesis in a Wide Potential Window

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摘要

The electrochemical CO_2 reduction reaction (CO_2RR) is a promising strategy to convert CO_2 to carbon-based fuels and to simultaneously reduce the emission of greenhouse gases into the atmosphere. In this work, the bismuth subcarbonate nanoflowers (BOC NFs) are facilely prepared through a one-pot synthesis method for efficient formate electrosynthesis through CO_2RR. Benefiting from the crystal structure and sheet-stacked morphology, the in situ measurements and theoretical calculation results reveal the selfreinforced CO_2 adsorption properties and rapid CO_2 adsorption–desorption kinetics on the catalyst surface, which significantly facilitate the CO_2RR process. As a result, the desirable Faradaic efficiencies of over 90, with a maximum value of 98.9, toward formate formation, are achieved in a wide potential window from ?0.8 to ?1.4 V in an H-type cell. Moreover, in a flow cell, the superior intrinsic activity of BOC NFs guarantees the high throughput electrocatalytic performance of CO_2RR and the FE_(formate) of over 90 with high current density is achieved in a potential range as wide as 1200 mV, demonstrating the great potential of BOC NFs for practical CO_2RR applications. These results underscore the effectiveness of designing electrocatalysts with self-reinforced CO_2 adsorption properties to improve electrocatalytic performance for efficient CO_2RR.

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  • 来源
    《Advanced functional materials》 |2022年第32期|2203794.1-2203794.9|共9页
  • 作者单位

    Department of Chemical and Materials Engineering University of Alberta Edmonton, Alberta T6G 1H9, Canada;

    Department of Chemical and Materials Engineering University of Alberta Edmonton, Alberta T6G 1H9, Canada,School of Minerals Processing and Bioengineering Central South University Changsha, Hunan 410083, P. R. China;

    Department of Chemical and Materials Engineering University of Alberta Edmonton, Alberta T6G 1H9, Canada,Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and Engineering Shenzhen University Shenzhen, Guangdong 518060,;

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  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类
  • 关键词

    bismuth; CO_2 adsorption; electrocatalysis; electrochemical CO_2 reduction; formate;

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