Platinum-Decorated Ruthenium Nanoparticles for Enhanced Methanol Electrooxidation

被引：25

作者：

Chen, Ching-Hsiang ^{[1
]}

Sarma, Loka Subramanyam ^{[1
]}

Wang, Di-Yan ^{[2
]}

Lai, Feng-Ju ^{[1
]}

Al Andra, Cun-Cun ^{[1
]}

Chang, Shi-Hong ^{[1
]}

Liu, Din-Goa ^{[3
]}

Chen, Chia-Chun ^{[2
,4
]}

Lee, Jyh-Fu ^{[3
]}

Hwang, Bing-Joe ^{[1
,3
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan

[2] Natl Taiwan Normal Univ, Taipei, Taiwan

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[4] Acad Sinica, Inst Atom & Mol Sci, Taipei, Taiwan

来源：

CHEMCATCHEM | 2010年 / 2卷 / 02期

关键词：

electrocatalysis; electrochemistry; fuel cells; nanoparticles; X-ray absorption spectroscopy; RAY-ABSORPTION SPECTROSCOPY; CORE-SHELL NANOPARTICLES; PT-RU NANOPARTICLES; FUEL-CELL CATALYSTS; BIMETALLIC NANOPARTICLES; CHEMICAL TRANSFORMATION; METAL NANOPARTICLES; STRUCTURAL-ANALYSIS; REVERSE MICELLES; PD;

D O I：

10.1002/cctc.200900051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A promising electrocatalyst based on the reduction of pt(2+) ions on the surface of hexagonally close-packed (hcp) Ru core nanoparticles has been prepared by a redox-transmetalation process. This simple synthetic process generates a Pt-on-Ru catalyst with a lower Pt content than commercially available Pt-Ru electrocatalysts and with a long-range ordered hcp structure, which can significantly reduce the Pt loading. X-Ray absorption spectroscopy of the Pt-on-Ru catalyst reveals pronounced electronic modifications when compared to the commercial Pt-Ru black catalyst. The Pt-on-Ru catalyst exhibits a higher mass-specific current than the Pt-Ru black catalyst in solution in 0.5 m H2SO4 with 10 vol.% CH3OH under the conditions of rotating disk experiments. Further optimization of this synthetic procedure may yield even more active electrocatalysts with a significant reduction in noble metal loadings.

引用

页码：159 / 166

页数：8

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