Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
15/04/2020 |
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Data da última atualização: |
11/12/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
PUPPIN, L. G.; KHALID, M.; SILVA, G. T. T.; RIBEIRO, C.; VARELA, H.; LOPES, O. F. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
Electrochemical reduction of CO2 to formic acid on Bi2O2CO3/carbon fiber electrodes. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Materials Research Society, n. 35, v. 3, 2020. |
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Páginas: |
272 - 280 |
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DOI: |
10.1557/jmr.2020.16 |
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Idioma: |
Inglês |
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Conteúdo: |
Electrochemical reduction of CO2 to formic acid is a good strategy to address both environmental and energy issues. However, some drawbacks including low activity, selectivity, and stability of electrocatalysts must be overcome. We propose a method for tailoring Bi 2 O 2CO 3 -coated carbon fiber electrodes with higher selectivity and stability for electrochemical CO 2 reduction to formic acid. We evaluated the effect of Bi 2 O 2CO 3 and Nafion contents on the electrocatalysts performance for CO 2 reduction reaction (CO 2RR). All electrodes produced only HCOO− in the liquid phase with a maximum faradaic efficiency (FE) of 69%. The electrocatalysts were stable under 24 h of continuous CO 2 RR operation. The FE increased with the increasing electrolyte concentration and cation radius size, which indicates that the anion stabilization in solution is critical for adequate formate generation. The CO 2 RR mechanism was proposed with basis on the literature. The structural carbonate of Bi2 O 2 CO3 acts as an intermediate species in the formate production from CO 2. |
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Palavras-Chave: |
Energy production; Metallic electrocatalysts; Organic pollutant degradation. |
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Categoria do assunto: |
-- |
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Marc: |
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
