Chemical and Biomolecular Engineering Faculty Research

Title

Size-dependent Oxygen Reduction Property of Octahedral Pt–ni Nanoparticle Electrocatalysts

Document Type

Article

Publication Date

Fall 10-9-2014

Abstract

The size effect on the electrocatalytic property of octahedral Pt–Ni alloy nanoparticles in the oxygen reduction reaction (ORR) was studied by making particles with different sizes and conducting electrochemical measurements. Octahedral Pt–Ni nanoparticles on carbon support (Pt–Ni/C) were produced using a facile and surfactant-free solid-state chemistry method. Two groups of octahedral Pt–Ni/C, including Pt3Ni/C and Pt1.5Ni/C, with particle size ranging from around 4 to 8 nm were prepared. Both the ORR activity and the stability of the two group catalysts were studied, which exhibited varying dependence over the particle size. The different relationships between the Pt–Ni size and the ORR property were investigated and attributed to alterations in the particle electronic/geometric structure and the Ni leaching behaviour.

Publication Title

Journal of Materials Chemistry A

Volume

2

Issue

46

First Page

19778

Last Page

19787