Surface Structures and Electrochemical Activities of PtRu Over layers on Ir Nanoparticles

Authors
Lee, Kug-SeungCho, Yong-HunJeon, Tae-YeolYoo, Sung JongPark, Hee-YoungJang, Jong HyunSung, Yung-Eun
Issue Date
2012-05
Publisher
AMER CHEMICAL SOC
Citation
ACS CATALYSIS, v.2, no.5, pp.739 - 745
Abstract
PtRu overlayers were deposited on carbon-supported Ir nanoparticles with various Pt:Ru compositions. Structural and electrochemical characterizations were performed using transmission electron microscopy (TEM), X-ray diffraction, high-resolution powder diffraction (HRPD), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), and CO stripping voltammetry. The PtRu overlayers were selectively deposited on the Ir nanoparticles with good uniformity of distribution. As a result, the PtRu utilization of the present samples was higher than that of PtRu/C. The mass-specific activities for methanol oxidation were also significantly higher. Single-cell performance using the Pt2Ru1 overlayer sample as an anode catalyst was slightly higher than that obtained using commercial PtRu/C despite the fact that the PtRu anode loading for Pt2Ru1/Ir/C was only 42% of that of PtRu/C.
Keywords
OXYGEN REDUCTION REACTION; MODIFIED AU NANOPARTICLES; CORE-SHELL NANOPARTICLES; PLATINUM-MONOLAYER SHELL; METHANOL ELECTROOXIDATION; ELECTROCATALYTIC ACTIVITY; STABILITY; CATALYSTS; PERFORMANCE; REACTIVITY; OXYGEN REDUCTION REACTION; MODIFIED AU NANOPARTICLES; CORE-SHELL NANOPARTICLES; PLATINUM-MONOLAYER SHELL; METHANOL ELECTROOXIDATION; ELECTROCATALYTIC ACTIVITY; STABILITY; CATALYSTS; PERFORMANCE; REACTIVITY; core/shell Structure; PtRu overlayer; Ir nanoparticle; methanol oxidation reaction; surface modification
ISSN
2155-5435
URI
https://pubs.kist.re.kr/handle/201004/129308
DOI
10.1021/cs2006907
Appears in Collections:
KIST Article > 2012
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