Synthesis and electrochemical characterization of Si/TiO2/Au composite anode: Efficient oxygen evolution and hydroxyl radicals generation
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Data
2021-02-20
Autores
Bessegato, G. G. [UNESP]
Cooke, M. D.
Christensen, P. A.
Wood, D.
Zanoni, M. V.B. [UNESP]
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Resumo
This paper describes the photoelectrochemical properties of a novel composite anode composed of a 200 nm Au-Sb ohmic contact/300 μm n-Si wafer/20 nm TiO2 /120 nm Au grid. By connecting the Au ohmic contact to the gold grid via a power supply, holes thermally or photochemically generated in the Si are launched to the TiO2 surface where they are converted to •OH radicals. We show that the Si/TiO2/Au composite anode can be efficiently employed in the oxygen evolution reaction and prove that the anode generates hydroxyl radicals (using p-nitrosodimethylaniline as a probe). Potential applications include the photoelectrocatalytic oxidation of organic contaminants, water splitting, and organic electro-synthesis.
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Palavras-chave
Dye degradation, Oxygen generation, Photoelectrochemistry, Titanium dioxide
Como citar
Electrochimica Acta, v. 370.