Issue 44, 2017

Facile synthesis of hollow dendritic Ag/Pt alloy nanoparticles for enhanced methanol oxidation efficiency

Abstract

Hollow dendritic Ag/Pt alloy nanoparticles were synthesized by a double template method: Ag nanoparticles as the hard template to obtain hollow spheres by a galvanic replacement reaction between PtCl62− and metallic Ag and surfactant micelles (Brij58) as the soft template to generate porous dendrites. The formation of a Ag/Pt alloy phase was confirmed by XRD and HRTEM. Elemental mapping and line scanning revealed the formation of the hollow architecture. We studied the effects of the Ag/Pt ratio, surfactant and reaction temperature on the morphology. In addition, we explored the formation process of hollow dendritic Ag/Pt nanoparticles by tracking the morphologies of the nanostructures formed at different stages. In order to improve the electrocatalytic property, we controlled the size of the nanoparticles and the thickness of the shell by adjusting the amount of the precursor. We found that these Ag/Pt alloy nanoparticles exhibited high activity (440 mA mg−1) and stability as an electrocatalyst for catalyzing methanol oxidation.

Graphical abstract: Facile synthesis of hollow dendritic Ag/Pt alloy nanoparticles for enhanced methanol oxidation efficiency

Supplementary files

Article information

Article type
Paper
Submitted
29 Sep 2017
Accepted
15 Oct 2017
First published
16 Oct 2017

Dalton Trans., 2017,46, 15541-15548

Facile synthesis of hollow dendritic Ag/Pt alloy nanoparticles for enhanced methanol oxidation efficiency

N. Sui, K. Wang, X. Shan, Q. Bai, L. Wang, H. Xiao, M. Liu, V. L. Colvin and W. W. Yu, Dalton Trans., 2017, 46, 15541 DOI: 10.1039/C7DT03671J

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