期刊
ELECTROCHIMICA ACTA
卷 363, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.137207
关键词
CO2 electroreduction; Copper-based catalysts; Copper(II) oxide; Methanol; Selectivity; GDE-electrodes
资金
- Portuguese Foundation for Science and Technology (FCT) [SERI-I/BD/128768/2017]
- European Regional Development Fund (ERDF) through COMPETE 2020 -Operational Programme for Competitiveness and internationalisation (OPCI) [POCI-01-0145-FEDER-016387]
- FCT -Fundacao para a Ciencia e a Tecnologia I.P.
- European Regional Development Fund (ERDF), through COMPETE2020 -Programa Operational Competitividade e Internacionalizacao (POCI) [POCI-010145-FEDER-006939, UID/EQU/00511/2013]
- FCT -Fundacao para a Ciencia e a Tecnologia
- North Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF) [NORTE-01-0145-FEDER-000005 - LEPABE-2-ECO-INNOVATION]
A highly efficient copper-catalyst (noble-metal free) was developed for the electrochemical reduction of CO2 (ERCO2) to methanol. Due to the nanowire structure of the catalyst, a remarkable ERCO2 selectivity was achieved, while the competing H-2 evolution reaction (HER) was significantly suppressed for the overall range of potential tested. The developed copper-catalyst (CuO NWs) outperforms the single metal Cu-catalysts in aqueous environment. Under atmospheric conditions, methanol was produced at an overpotential of 410 mV with a faradaic efficiency (FE) of 66%, and 1.27 x 10(-4) mol m(-2) s(-1) of production yield; which represents a 6.7% improvement over the previously reported value of 1.19 x 10(-4) mol m(-2) s(-1). Interestingly, when the developed CuO NWs was used as a gas diffusion electrode (GDE) in a filter-press cell (more real industrial configuration), methanol remained as the major ERCO2 product with the same FE (66%). (C) 2020 Elsevier Ltd. All rights reserved.
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