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- W3021253103 abstract "In this article, we report a robust model for studying electrocatalytic reactions at metal nanoparticles (NPs) in contact with metal oxide surfaces. The metal oxide layer (TiOx) is prepared by atomic layer deposition, and it is sufficiently thin that it does not hinder electron transfer from the underlying conductive electrode to the supported AuNP electrocatalysts. In advance of the experiments, density functional theory (DFT) predicted that direct contact between AuNPs and TiOx would lead to enhanced activity for the oxygen reduction reaction (ORR). DFT attributes the observed ORR enhancement to partial charge transfer from oxygen vacancies within the TiOx film to the supported AuNPs and hence formation of anionic Au species. The experimental findings are in near quantitative agreement with the DFT results. Specifically, compared to isolated AuNPs, decreases of ∼100 and ∼50 mV in the ORR onset potential are observed experimentally for AuNPs supported on TiO1.9 and TiO2.0 films, respectively." @default.
- W3021253103 created "2020-05-13" @default.
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- W3021253103 date "2020-04-28" @default.
- W3021253103 modified "2023-10-11" @default.
- W3021253103 title "Effect of TiO<sub><i>x</i></sub> Substrate Interactions on the Electrocatalytic Oxygen Reduction Reaction at Au Nanoparticles" @default.
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- W3021253103 doi "https://doi.org/10.1021/acs.jpcc.0c02754" @default.
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