Cobalt as a sacrificial metal to increase the photoelectrochemical stability of CuBi2O4 films for water splitting.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorBruziquesi, Carlos Giovani Oliveira-
Autor(es): dc.creatorStolzemburg, Matheus Cata Preta-
Autor(es): dc.creatorSouza, Rafael R. de-
Autor(es): dc.creatorRodriguez, Mariandry del Valle Rodriguez-
Autor(es): dc.creatorPereira, Maria Luiza Rocco Duarte-
Autor(es): dc.creatorSalomão, Pedro Emílio Amador-
Autor(es): dc.creatorNogueira, André Esteves-
Autor(es): dc.creatorLopez Cabaña, Zoraya Elena-
Autor(es): dc.creatorPereira, Márcio César-
Autor(es): dc.creatorSilva, Adilson Cândido da-
Data de aceite: dc.date.accessioned2025-08-21T15:11:59Z-
Data de disponibilização: dc.date.available2025-08-21T15:11:59Z-
Data de envio: dc.date.issued2023-11-16-
Data de envio: dc.date.issued2023-11-16-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/jspui/handle/123456789/17802-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0360319922049850-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.ijhydene.2022.10.195-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1005481-
Descrição: dc.descriptionCuBi2O4 is an excellent photocathode candidate in water-splitting photoelectrochemical cells. However, its poor photoelectrochemical stability caused by the reduction of Cu2þ to Cu metal limits its use. Here, we show a strategy to decrease the reduction of Cu2þ to Cu using cobalt as a sacrificial metal. Co-doped CuBi2O4 films were prepared by spray pyrolysis using Co2þ salt as the precursor. Co2þ ions replace Cu2þ in the CuBi2O4 structure, and subsequent heat treatment at 500 C leads to partial oxidation of Co2þ to Co3þ. As the reduction potential of Co3þ/Co2þ is higher than that of Cu2þ/Cu, Cu2þ reduction can be minimized. Comparatively, about 72% of the photocurrent produced by the CuBi2O4 film is lost in the first few minutes of illumination. In the Co-doped CuBi2O4 film, the photocurrent drops by less than 7%. Thus, the Co-doping can increase the CuBi2O4 photostability and be helpful for the fabrication of more stable photocathodes.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectWater splitting-
Palavras-chave: dc.subjectPhotocathode-
Palavras-chave: dc.subjectPhotocorrosion-
Palavras-chave: dc.subjectPhotoelectrochemical cell-
Palavras-chave: dc.subjectHydrogen-
Título: dc.titleCobalt as a sacrificial metal to increase the photoelectrochemical stability of CuBi2O4 films for water splitting.-
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