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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
12/12/2024 |
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Data da última atualização: |
12/12/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
REIS, E. A. dos; SILVA, G. T. S. T. da; RIBEIRO, C. |
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Afiliação: |
UNIVERSITY OF SAO PAULO (USP); FEDERAL UNIVERSITY OF SAO CARLOS; CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
K+ selectivity modulation in non-aqueous CO2 electroreduction on lead catalysts: from oxalic to tartaric acid production. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Journal Materials Chemistry A, v. 12, 2024. |
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Páginas: |
15829–15836 |
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DOI: |
10.1039/d4ta01172d |
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Idioma: |
Inglês |
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Conteúdo: |
Here, we show that the presence of potassium ions in the catholyte modulates the selectivity of a Pb plate electrode, leading to the formation of tartrate, a C4 compound, from CO2 reduction. A faradaic efficiency of 60% was achieved at −2.3 V (vs. Ag/Ag+) for tartrate using a proton exchange membrane and a high concentration of potassium-based supporting anolyte. The electrode microenvironment with a higher potassium concentration also inhibits cathode corrosion and deactivation. Remarkably, the electroreduction of CO2 changes the selectivity with the cationic availability in the anolyte. Higher FE to formic acid is observed with an increase in the proton concentration, and by increasing anolyte K+ availability, C–C coupled products (oxalate, C2, and tartrate, C4) are formed in the majority. Our results prove that controlling potassium ions and the proton concentration in the catholyte regulates the selectivity of the Pb plate electrode and can lead to the formation of a C2+ product from CO2 reduction. |
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Palavras-Chave: |
Controlling potassium ions. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01613naa a2200181 a 4500
001 2170622
005 2024-12-12
008 2024 bl uuuu u00u1 u #d
024 7 $a10.1039/d4ta01172d$2DOI
100 1 $aREIS, E. A. dos
245 $aK+ selectivity modulation in non-aqueous CO2 electroreduction on lead catalysts$bfrom oxalic to tartaric acid production.$h[electronic resource]
260 $c2024
300 $a15829–15836
520 $aHere, we show that the presence of potassium ions in the catholyte modulates the selectivity of a Pb plate electrode, leading to the formation of tartrate, a C4 compound, from CO2 reduction. A faradaic efficiency of 60% was achieved at −2.3 V (vs. Ag/Ag+) for tartrate using a proton exchange membrane and a high concentration of potassium-based supporting anolyte. The electrode microenvironment with a higher potassium concentration also inhibits cathode corrosion and deactivation. Remarkably, the electroreduction of CO2 changes the selectivity with the cationic availability in the anolyte. Higher FE to formic acid is observed with an increase in the proton concentration, and by increasing anolyte K+ availability, C–C coupled products (oxalate, C2, and tartrate, C4) are formed in the majority. Our results prove that controlling potassium ions and the proton concentration in the catholyte regulates the selectivity of the Pb plate electrode and can lead to the formation of a C2+ product from CO2 reduction.
653 $aControlling potassium ions
700 1 $aSILVA, G. T. S. T. da
700 1 $aRIBEIRO, C.
773 $tJournal Materials Chemistry A$gv. 12, 2024.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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