A Platinum Monolayer Core-Shell Catalyst with a Ternary Alloy Nanoparticle Core and Enhanced Stability for the Oxygen Reduction Reaction

Journal of Nanomaterials. 2015;2015 DOI 10.1155/2015/715474

 

Journal Homepage

Journal Title: Journal of Nanomaterials

ISSN: 1687-4110 (Print); 1687-4129 (Online)

Publisher: Hindawi Publishing Corporation

LCC Subject Category: Technology: Technology (General)

Country of publisher: Egypt

Language of fulltext: English

Full-text formats available: PDF, HTML, ePUB

 

AUTHORS

Haoxiong Nan (The Key Laboratory of Fuel Cell Technology of Guangdong Province and The Key Laboratory of New Energy of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road, Guangzhou, Guangdong 510640, China)
Xinlong Tian (The Key Laboratory of Fuel Cell Technology of Guangdong Province and The Key Laboratory of New Energy of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road, Guangzhou, Guangdong 510640, China)
Lijun Yang (The Key Laboratory of Fuel Cell Technology of Guangdong Province and The Key Laboratory of New Energy of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road, Guangzhou, Guangdong 510640, China)
Ting Shu (The Key Laboratory of Fuel Cell Technology of Guangdong Province and The Key Laboratory of New Energy of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road, Guangzhou, Guangdong 510640, China)
Huiyu Song (The Key Laboratory of Fuel Cell Technology of Guangdong Province and The Key Laboratory of New Energy of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road, Guangzhou, Guangdong 510640, China)
Shijun Liao (The Key Laboratory of Fuel Cell Technology of Guangdong Province and The Key Laboratory of New Energy of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road, Guangzhou, Guangdong 510640, China)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 16 weeks

 

Abstract | Full Text

We synthesize a platinum monolayer core-shell catalyst with a ternary alloy nanoparticle core of Pd, Ir, and Ni. A Pt monolayer is deposited on carbon-supported PdIrNi nanoparticles using an underpotential deposition method, in which a copper monolayer is applied to the ternary nanoparticles; this is followed by the galvanic displacement of Cu with Pt to generate a Pt monolayer on the surface of the core. The core-shell Pd1Ir1Ni2@Pt/C catalyst exhibits excellent oxygen reduction reaction activity, yielding a mass activity significantly higher than that of Pt monolayer catalysts containing PdIr or PdNi nanoparticles as cores and four times higher than that of a commercial Pt/C electrocatalyst. In 0.1 M HClO4, the half-wave potential reaches 0.91 V, about 30 mV higher than that of Pt/C. We verify the structure and composition of the carbon-supported PdIrNi nanoparticles using X-ray powder diffraction, X-ray photoelectron spectroscopy, thermogravimetry, transmission electron microscopy, and energy dispersive X-ray spectrometry, and we perform a stability test that confirms the excellent stability of our core-shell catalyst. We suggest that the porous structure resulting from the dissolution of Ni in the alloy nanoparticles may be the main reason for the catalyst’s enhanced performance.