Durable hydrogen evolution from water driven by sunlight using (Ag,Cu)GaSe(2) photocathodes modified with CdS and CuGa(3)Se(5)

The photoelectrochemical properties of (Ag,Cu)GaSe(2) (ACGSe) modified by deposition of CdS and CuGa(3)Se(5) layers were investigated. The CdS and CuGa(3)Se(5) layers formed p–n junctions with an appropriate band diagram on the surface of the electrode and they clearly increased the cathodic photocu...

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Detalles Bibliográficos
Autores principales: Zhang, Li, Minegishi, Tsutomu, Nakabayashi, Mamiko, Suzuki, Yohichi, Seki, Kazuhiko, Shibata, Naoya, Kubota, Jun, Domen, Kazunari
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2015
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5811107/
https://www.ncbi.nlm.nih.gov/pubmed/29560174
http://dx.doi.org/10.1039/c4sc02346c
Descripción
Sumario:The photoelectrochemical properties of (Ag,Cu)GaSe(2) (ACGSe) modified by deposition of CdS and CuGa(3)Se(5) layers were investigated. The CdS and CuGa(3)Se(5) layers formed p–n junctions with an appropriate band diagram on the surface of the electrode and they clearly increased the cathodic photocurrent and onset potential. The Pt, CdS, and CuGa(3)Se(5) modified ACGSe (Pt/CdS/CuGa(3)Se(5)/ACGSe) with an appropriate thickness of CuGa(3)Se(5) layers (ca. 100 nm) showed a cathodic photocurrent of 8.79 mA cm(–2) at 0 V(RHE) and an onset potential of 0.62 V(RHE) (defined as cathodic photocurrent of 1.0 mA cm(–2)) under simulated sunlight irradiation in 0.1 M Na(2)HPO(4) (pH 10). Pt/CdS/CuGa(3)Se(5)/ACGSe showed durable cathodic current under the observed reaction conditions and hydrogen was evolved for about 20 days.

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