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Polymer-Supported Liquid Layer Electrolyzer Enabled Electrochemical CO2 Reduction to CO with High Energy Efficiency.

ABSTRACT: The electrochemical conversion of carbon dioxide (CO2 ) to carbon monoxide (CO) is a favorable approach to reduce CO2 emission while converting excess sustainable energy to important chemical feedstocks. At high current density (>100 mA cm-2 ), low energy efficiency (EE) and unaffordable cell cost limit the industrial application of conventional CO2 electrolyzers. Thus, a crucial and urgent task is to design a new type of CO2 electrolyzer that can work efficiently at high current density. Here we report a polymer-supported liquid layer (PSL) electrolyzer using polypropylene non-woven fabric as a separator between anode and cathode. Ag based cathode was fed with humid CO2 and potassium hydroxide was fed to earth-abundant NiFe-based anode. In this configuration, the PSL provided high-pH condition for the cathode reaction and reduced the cell resistance, achieving a high full cell EE over 66 % at 100 mA cm-2 .

SUBMITTER: Li S 

PROVIDER: S-EPMC8186884 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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Polymer-Supported Liquid Layer Electrolyzer Enabled Electrochemical CO<sub>2</sub> Reduction to CO with High Energy Efficiency.

Li Shangyu S   Ma Yiwen Y   Zhao Tiancheng T   Li Jiaxin J   Kang Xinyue X   Guo Wen W   Wen Yunzhou Y   Wang Liping L   Wang Yurui Y   Lin Renxing R   Li Tiantian T   Tan Hairen H   Peng Huisheng H   Zhang Bo B  

ChemistryOpen 20210601 6

The electrochemical conversion of carbon dioxide (CO<sub>2</sub> ) to carbon monoxide (CO) is a favorable approach to reduce CO<sub>2</sub> emission while converting excess sustainable energy to important chemical feedstocks. At high current density (>100 mA cm<sup>-2</sup> ), low energy efficiency (EE) and unaffordable cell cost limit the industrial application of conventional CO<sub>2</sub> electrolyzers. Thus, a crucial and urgent task is to design a new type of CO<sub>2</sub> electrolyzer th  ...[more]

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