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• W2955962210 startingPage "4538" @default.
• W2955962210 abstract "Pt-based catalysts are common in fuel cells but suffer from high cost and poor durability. To overcome these limitations, earth-abundant metals are often incorporated with Pt in core@shell architectures or through alloy formation. Here, the concepts of a core@shell architecture, alloyed surfaces, and high-durability intermetallics are integrated into one nanostructure platform using seed-mediated co-reduction (SMCR). Specifically, random alloy PtM (where M = Ni, Co, Cu, or Fe) shells are deposited on intermetallic PdCu B2 seeds. Control of shell thickness and Pt:M ratios is also demonstrated, providing a general route to strain-engineered alloyed surfaces. The performance of these nanocatalysts was evaluated for the oxygen reduction reaction (ORR) as a function of shell thickness and shell composition, where PtCu and PtNi shells showed a 230% and 270% activity increase, respectively, compared to the Pt reference. This evaluation is coupled with Tafel plot analysis which shows significant changes in the Tafel slopes, which indicate a shift in the rate-limiting step when a core@shell architecture is incorporated. Significantly, this work demonstrates the versatility of SMCR as a facile way to integrate a core@shell architecture, alloyed surfaces, and high-durability intermetallics within one platform." @default.
• W2955962210 created "2019-07-12" @default.
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• W2955962210 date "2019-06-27" @default.
• W2955962210 modified "2023-09-25" @default.
• W2955962210 title "Building Random Alloy Surfaces from Intermetallic Seeds: A General Route to Strain-Engineered Electrocatalysts with High Durability" @default.
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• W2955962210 doi "https://doi.org/10.1021/acsanm.9b00901" @default.
• W2955962210 hasPublicationYear "2019" @default.
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