Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

A photoassisted hydrogen peroxide fuel cell using dual photoelectrodes under tandem illumination for electricity generation

Texto completo
Autor(es):
Andrade, Tatiana Santos [1] ; Cunha Sa, Barbara Antunes [1] ; Sena, Izabela Campos [1] ; Santos Neto, Antero Ricardo [1] ; Esteves Nogueira, Francisco Guilherme [2] ; Lianos, Panagiotis [3] ; Pereira, Marcio Cesar [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Fed Univ Jequitinhonha & Mucuri Valleys UFVJM, Inst Sci Engn & Technol ICET, Campus Mucuri, BR-39803371 Teofilo Otoni, MG - Brazil
[2] Fed Univ Sao Carlos UFSCar, Dept Chem Engn, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Patras, Dept Chem Engn, Patras 26500 - Greece
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 881, JAN 15 2021.
Citações Web of Science: 1
Resumo

Photoassisted hydrogen peroxide fuel cells are promising for converting chemical energy into electricity due to the high energy density and safe storage of H2O2. Despite this, the power density produced by H2O2 photocatalytic fuel cells is still low. Here, we demonstrate a membrane-free hydrogen peroxide photocatalytic cell using a W-BiVO4/V2O5 photoanode and a Cu2O/CuO photocathode under tandem lighting, which operates in an air-saturated NaHCO3/H2O2 aqueous solution (pH 8). H2O2 plays a dual role as an electron donor and acceptor, thus eliminating the need to use a membrane to separate the photoanode from the photocathode. Under simulated sunlight, the cell produces a short-circuit photocurrent density of 8.05 mA cm(-2), an open-circuit potential of 0.41 V, and a power density of 0.84 mW cm(-2). The power density of dual-photoelectrode cells is significantly higher than the single-photoelectrode cells due to the higher efficiency of charge separation and light absorption provided by the tandem cell. Finally, this simple cell design should be attractive for constructing efficient, green, and sustainable H2O2 photocatalytic fuel cells. (AU)

Processo FAPESP: 18/09723-9 - Fotoconversão de co2 em produtos com valor agregado: estudo experimental e teórico
Beneficiário:Francisco Guilherme Esteves Nogueira
Modalidade de apoio: Auxílio à Pesquisa - Regular