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• W2045440260 abstract "We demonstrate a facile one-step method to synthesize [email protected] core–shell nanoparticles (NPs) with a control over the shape and the Pt-shell thickness of the NPs. By adjusting the relative reactivity of the Pt and Ni reagents in ultrasound-assisted polyol reactions, two [email protected] NP samples of the same composition (Ni/Pt = 1) and size (3–4 nm) but with different particle shape (octahedral vs. truncated octahedral) and different Pt-shell thicknesses (1–2 vs. 2–3 monolayer) are obtained. The control is achieved by using different Ni reagents, Ni(acac)2 (acac = acetylacetonate) and Ni(hfac)2 (hfac = hexafluoroacetylacetonate). A reaction mechanism that can explain all of the observations is proposed. The [email protected] NPs show up to threefold higher mass activity than pure Pt NPs in oxygen reduction reaction. Between the two [email protected] NP samples, the one composed of octahedral NPs with the thicker Pt-shell has higher activity than the other." @default.
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• W2045440260 date "2014-01-01" @default.
• W2045440260 modified "2023-10-17" @default.
• W2045440260 title "One-step sonochemical syntheses of Ni@Pt core–shell nanoparticles with controlled shape and shell thickness for fuel cell electrocatalyst" @default.
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• W2045440260 doi "https://doi.org/10.1016/j.ultsonch.2013.05.006" @default.
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