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Título: | Photoassisted chemical energy conversion into electricity using a sulfite-iron photocatalytic fuel cell. |
Autor(es): | Sena, Izabela Campos Sales, Davi de Oliveira Andrade, Tatiana Santos Rodriguez, Mariandry del Valle Rodriguez Silva, Adilson Cândido da Nogueira, Francisco Guilherme Esteves Rodrigues, Jairo Lisboa Mesquita, João Paulo de Pereira, Márcio César |
Palavras-chave: | Solar cell Bismuth vanadate Vanadium oxide |
Data do documento: | 2021 |
Referência: | SENA, I. C. et al. Photoassisted chemical energy conversion into electricity using a sulfite-iron photocatalytic fuel cell. Journal of Electroanalytical Chemistry, v. 881, artigo 114940, 2021. Disponível em: <https://www.sciencedirect.com/science/article/abs/pii/S1572665720311693>. Acesso em: 10 jun. 2021. |
Resumo: | Photocatalytic fuel cells (PFC) are light-assisted devices that convert chemical energy into electricity. However, con ventional PFC produces extremely low photocurrents due to the slow kinetics of the photoanodes to oxidized organic fuels, thus limiting the power generation. Here, an all-inorganic PFC manufactured with heterostructured W-BiVO4/ V2O5 photoanode separated from a platinum cathode by a porous membrane is described. Sulfite ions are used as a fuel anolyte and Fe3+ is the catholyte. Under lighting, the W-BiVO4/V2O5 photoanode is exceptionally efficient for oxidizing sulfite to sulfate, which results in a high photocurrent output. Under optimized conditions, the W-BiVO4/V2O5-Pt cell produces a high short-circuit current of 8.79 mA cm−2 , an open-circuit potential 0.85 V, and a power density of 1.89 mW cm−2 at 4.30 mA cm−2 . The excellent PFC performance is attributed to the photovoltage generated by W-BiVO4/sulfite-sulfate liquid-junctions and efficient charge separation and hole transport in the photoanode bulk promoted by the W-BiVO4/V2O5 junctions. Also, the kinetics of redox reactions are fast, eliminating the use of cocatalysts. Thus, this simple PFC concept can be a viable alternative for electricity generation. |
URI: | http://www.repositorio.ufop.br/jspui/handle/123456789/14157 |
Link para o artigo: | https://www.sciencedirect.com/science/article/abs/pii/S1572665720311693 |
DOI: | https://doi.org/10.1016/j.jelechem.2020.114940 |
ISSN: | 1572-6657 |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_PhotoassistedchemicalEnergy.pdf Restricted Access | 3,91 MB | Adobe PDF | Visualizar/Abrir |
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