Structural Evolution of Solid Pt Nanoparticles to a Hollow PtFe Alloy with a Pt-Skin Surface via Space-Confined Pyrolysis and the Nanoscale Kirkendall Effect.

Wang, Qingmei; Chen, Siguo; Shi, Feng; Chen, Ke; Nie, Yao; Wang, Yao; Wu, Rui; Li, Jia et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

A space-confined interfacial conversion approach is developed to directly transform 3 nm solid Pt nanoparticles into a 5 nm hollow PtFe alloy featuring a Pt-skin surface. The approach presented for the structural evolution from solid Pt NPs to hollow PtFe alloy with controlled size, structure, and composition can be applied to other multimetallic electrocatalysts.