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- W2318593501 abstract "Mesoporous Pt-Au binary alloys were electrochemically synthesized from lyotropic liquid crystals (LLCs) containing corresponding metal species. Two-dimensional exagonally ordered LLC templates were prepared on conductive substrates from diluted surfactant solutions including water, a nonionic surfactant, ethanol, and metal species by drop-coating. Electrochemical synthesis using such LLC templates enabled the preparation of ordered mesoporous Pt-Au binary alloys without phase segregation. The framework composition in the mesoporous Pt-Au alloy was controlled simply by changing the compositional ratios in the precursor solution. Mesoporous Pt-Au alloys with low Au content exhibited well-ordered 2D hexagonal mesostructures, reflecting those of the original templates. With increasing Au content, however, the mesostructural order gradually decreased, thereby reducing the electrochemically active surface area. Wide-angle X-ray diffraction profiles, X-ray photoelectron spectra, and elemental mapping showed that both Pt and Au were atomically distributed in the frameworks. The electrochemical stability of mesoporous Pt-Au alloys toward methanol oxidation was highly improved relative to that of nonporous Pt and mesoporous Pt films, suggesting that mesoporous Pt-Au alloy films are potentially applicable as electrocatalysts for direct methanol fuel cells. Also, mesoporous Pt-Au alloy electrodes showed a highly sensitive amperometric response for glucose molecules, which will be useful in next-generation enzyme-free glucose sensors." @default.
- W2318593501 created "2016-06-24" @default.
- W2318593501 creator A5010327933 @default.
- W2318593501 creator A5023055947 @default.
- W2318593501 creator A5024324765 @default.
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- W2318593501 creator A5071040867 @default.
- W2318593501 creator A5079586020 @default.
- W2318593501 creator A5086664647 @default.
- W2318593501 date "2012-03-06" @default.
- W2318593501 modified "2023-10-04" @default.
- W2318593501 title "Electrochemical Synthesis of Mesoporous Pt–Au Binary Alloys with Tunable Compositions for Enhancement of Electrochemical Performance" @default.
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- W2318593501 doi "https://doi.org/10.1021/ja209044g" @default.
- W2318593501 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22352760" @default.
- W2318593501 hasPublicationYear "2012" @default.