Data/hora: 17/06/2024 11:59:30

Biblioteca(s): | Embrapa Instrumentação.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 25/03/2022
Data da última atualização: | 24/01/2024
Autoria: | OLIVEIRA, J. A.; SILVA, R. R. M.; SILVA, G. T. S. T. da; TORRES, J. A.; VALI, A.; RIBEIRO, C.; KRISHNAN, R.; RUOTOLO, L. A. M.
Afiliação: | CAUE RIBEIRO DE OLIVEIRA, CNPDIA.
Título: | Copper vanadates: Targeted synthesis of two pure phases and use in a photoanode/cathode setup for selective photoelectrochemical conversion .of carbon dioxide to liquid fuel.
Ano de publicação: | 2022
Fonte/Imprenta: | Materials Research Bulletin, v 149, 111716, 2022.
ISSN: | 0025-5408
DOI: | https://doi.org/10.1016/j.materresbull.2021.111716
Idioma: | Inglês
Conteúdo: | Durable photocathodes are a matter of crucial concern in photoelectrochemical (PEC) CO2 reduction and a photoanode/dark cathode configuration is a viable strategy to circumvent this stability issue. In this vein, this study addresses a literature gap related to emerging photoelectrode materials for solar fuels generation. First is the perennial problem of securing a pure phase in the ternary copper vanadate (Cu-V-O) family of inorganic semiconductors. An optimized synthesis route was developed to prepare two copper vanadates with distinct morphological and optical properties. The copper site valence in the precursor influenced the semiconductor composition type: a Cu(II) source led to n-type &#946;-Cu2V2O7 while employing a Cu(I) source and an inert, deoxygenated environment, p-type &#945;-CuVO3 was obtained. The &#945;-CuVO3 photoelectrode was unstable and easily converted to &#946;-Cu2V2O7. Therefore, only the PEC performance of &#946;-Cu2V2O7 towards CO2 reduction was evaluated in this study, demonstrating that mainly methanol (generation flux: ~236 &#956;mol cm-2 h&#8722; 1 ) was selectively formed.
Palavras-Chave: | Catalytic properties; Chemical synthesis; Nanostructures.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (17966-1) - UPC - AP - DD - PROCI.22/28 -  - 2022/30 - DIS