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Título: | High water oxidation performance of W-Doped BiVO4 photoanodes coupled to V2O5 rods as a photoabsorber and hole carrier. |
Autor(es): | Oliveira, Andreia Teixeira de Rodriguez, Mariandry del Valle Rodriguez Andrade, Tatiana Santos Souza, Helen E. A. de Ardisson, José Domingos Oliveira, Henrique dos Santos Oliveira, Luiz Carlos Alves de Lorençon, Eudes Silva, Adilson Cândido da Nascimento, Lucas Leão Patrocinio, Antonio Otavio de Toledo Pereira, Márcio César |
Palavras-chave: | Energy conversion Photoelectrochemical Water splitting |
Data do documento: | 2018 |
Referência: | OLIVEIRA, A. T. de et al. High water oxidation performance of W-Doped BiVO4 photoanodes coupled to V2O5 rods as a photoabsorber and hole carrier. Solar RRL, v. 2, n. 8, p. 1-8, ago. 2018. Disponível em: <https://onlinelibrary.wiley.com/doi/full/10.1002/solr.201800089>. Acesso em: 7 mar. 2019. |
Resumo: | Monoclinic BiVO4 is recognized as a promising photoanode for water oxidation, but its relatively wide bandgap energy (Eg ≈2.5 eV) and poor charge transport limit the light absorption (ηabs) and charge separation (ηsep) efficiencies, thus resulting in low photocurrents. To solve these drawbacks, here the ηabs × ηsep product has been decoupled by combining W‐doped BiVO4 and V2O5 rods (Eg ≈2.1 eV) for simultaneously increasing the light harvesting and the charge separation in photoanodes under back‐side illumination. In this strategy, V2O5 rods maximize the light absorption and hole transport throughout the W‐BiVO4 film, making more holes to achieve the V2O5/W‐BiVO4/H2O interface to trigger the water oxidation reaction with photocurrents as high as 6.6 mA cm−2 at 1.23 VRHE after 2 h reaction. Notably, under back‐side illumination, the W‐BiVO4/V2O5 photoanode exhibited ηabs × ηsep of 74.5 and 93.0% at 0.5 and 1.23 VRHE, respectively, the highest values reported up to date for BiVO4‐based photoelectrodes. This simple strategy brings us closer to develop efficient photoanodes for photoelectrochemical water splitting devices. |
URI: | http://www.repositorio.ufop.br/handle/123456789/11152 |
Link para o artigo: | https://onlinelibrary.wiley.com/doi/full/10.1002/solr.201800089 |
DOI: | https://doi.org/10.1002/solr.201800089 |
ISSN: | 2367-198X |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_HighWaterOxidation.pdf Restricted Access | 1,17 MB | Adobe PDF | Visualizar/Abrir |
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