A study on improving the current density performances of CO2 electrolysers

Abstract Electrochemical CO2 reduction reaction (CO2RR) technology can reduce CO2 emission with converting excess electrical energy to high-value-added chemicals, which however needs further improvement on the electrolyser cell performance. In this work, extensive factors were explored in continuous...

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Autores principales:	Yueyuan Gu, Jucai Wei, Xu Wu, Xiaoteng Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dcd422129cc84cb0801b17249962db50
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spelling	oai:doaj.org-article:dcd422129cc84cb0801b17249962db502021-12-02T16:53:12ZA study on improving the current density performances of CO2 electrolysers10.1038/s41598-021-90581-02045-2322https://doaj.org/article/dcd422129cc84cb0801b17249962db502021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90581-0https://doaj.org/toc/2045-2322Abstract Electrochemical CO2 reduction reaction (CO2RR) technology can reduce CO2 emission with converting excess electrical energy to high-value-added chemicals, which however needs further improvement on the electrolyser cell performance. In this work, extensive factors were explored in continuous CO2 electrolysers. Gold, one of the benchmark materials for CO2RR to produce CO, was used as the catalyst. Electrolyser configurations and membrane types have significant influences on cell performance. Compact MEA-constructed gas-phase electrolyser showed better catalytic performance and lower energy consumption. The gas diffusion electrode with a 7:1 mass ratio of total-catalyst-to-polytetrafluoroethylene (PTFE) ionomer exhibited the best performance. At a low total cell voltage of 2.2 V, the partial current density of CO production achieved 196.8 mA cm−2, with 90.6% current efficiency and 60.4% energy efficiency for CO producing respectively. Higher CO selectivity can be achieved using anion exchange membranes, while higher selectivity for hydrogen and formate products can be achieved with cation exchange membranes. This research has pointed out a way on how to improve the CO2RR catalytic performance in flow cells, leaving aside the characteristics of the catalyst itself.Yueyuan GuJucai WeiXu WuXiaoteng LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yueyuan Gu Jucai Wei Xu Wu Xiaoteng Liu A study on improving the current density performances of CO2 electrolysers
description	Abstract Electrochemical CO2 reduction reaction (CO2RR) technology can reduce CO2 emission with converting excess electrical energy to high-value-added chemicals, which however needs further improvement on the electrolyser cell performance. In this work, extensive factors were explored in continuous CO2 electrolysers. Gold, one of the benchmark materials for CO2RR to produce CO, was used as the catalyst. Electrolyser configurations and membrane types have significant influences on cell performance. Compact MEA-constructed gas-phase electrolyser showed better catalytic performance and lower energy consumption. The gas diffusion electrode with a 7:1 mass ratio of total-catalyst-to-polytetrafluoroethylene (PTFE) ionomer exhibited the best performance. At a low total cell voltage of 2.2 V, the partial current density of CO production achieved 196.8 mA cm−2, with 90.6% current efficiency and 60.4% energy efficiency for CO producing respectively. Higher CO selectivity can be achieved using anion exchange membranes, while higher selectivity for hydrogen and formate products can be achieved with cation exchange membranes. This research has pointed out a way on how to improve the CO2RR catalytic performance in flow cells, leaving aside the characteristics of the catalyst itself.
format	article
author	Yueyuan Gu Jucai Wei Xu Wu Xiaoteng Liu
author_facet	Yueyuan Gu Jucai Wei Xu Wu Xiaoteng Liu
author_sort	Yueyuan Gu
title	A study on improving the current density performances of CO2 electrolysers
title_short	A study on improving the current density performances of CO2 electrolysers
title_full	A study on improving the current density performances of CO2 electrolysers
title_fullStr	A study on improving the current density performances of CO2 electrolysers
title_full_unstemmed	A study on improving the current density performances of CO2 electrolysers
title_sort	study on improving the current density performances of co2 electrolysers
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/dcd422129cc84cb0801b17249962db50
work_keys_str_mv	AT yueyuangu astudyonimprovingthecurrentdensityperformancesofco2electrolysers AT jucaiwei astudyonimprovingthecurrentdensityperformancesofco2electrolysers AT xuwu astudyonimprovingthecurrentdensityperformancesofco2electrolysers AT xiaotengliu astudyonimprovingthecurrentdensityperformancesofco2electrolysers AT yueyuangu studyonimprovingthecurrentdensityperformancesofco2electrolysers AT jucaiwei studyonimprovingthecurrentdensityperformancesofco2electrolysers AT xuwu studyonimprovingthecurrentdensityperformancesofco2electrolysers AT xiaotengliu studyonimprovingthecurrentdensityperformancesofco2electrolysers
_version_	1718382890742448128

A study on improving the current density performances of CO2 electrolysers

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