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Synthesis and electrochemical characterization of Si/TiO₂/Au composite anode: Efficient oxygen evolution and hydroxyl radicals generation

Lookup NU author(s): Professor Paul ChristensenORCiD

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Abstract

© 2021This 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.

Publication metadata

Author(s): Bessegato GG, Cooke MD, Christensen PA, Wood D, Zanoni MVB

Publication type: Article

Publication status: Published

Journal: Electrochimica Acta

Year: 2021

Volume: 370

Print publication date: 20/02/2021

Online publication date: 07/01/2021

Acceptance date: 03/01/2021

ISSN (print): 0013-4686

ISSN (electronic): 1873-3859

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.electacta.2021.137742

DOI: 10.1016/j.electacta.2021.137742

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