Pt-Guided Formation of Pt-Ag Alloy Nanoislands on Au Nanorods and Improved Methanol Electro-Oxidation

被引：87

作者：

He, Weiwei ^{[1
,3
]}

Wu, Xiaochun ^{[1
]}

Liu, Jianbo ^{[1
,3
]}

Zhang, Ke ^{[1
,3
]}

Chu, Weiguo ^{[1
]}

Feng, Lili ^{[1
,3
]}

Hu, Xiaona ^{[1
,3
]}

Zbou, Weiya ^{[2
]}

Me, Sishen ^{[2
]}

机构：

[1] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 24期

基金：

中国国家自然科学基金;

关键词：

SHAPE-CONTROLLED SYNTHESIS; SEED-MEDIATED GROWTH; GOLD NANORODS; ASPECT-RATIO; BIMETALLIC NANOPARTICLES; PLATINUM NANOCRYSTALS; OPTICAL-PROPERTIES; CANCER-CELLS; FUEL-CELLS; SILVER;

D O I：

10.1021/jp9027707

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 simple and facile method was developed to fabricate alloyed Pt-Ag nanoislands on Au nanorods (denoted as Au@Pt-Ag NRs). The island growth mode of Pt on the Au rod was employed to guide the growth behavior of Pt-Ag alloys. The formation of the Pt-Ag alloy was confirmed by scanning electron microscopy (SEM). transmission electron microscopy (TEM), XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), UV-visible absorption spectra, and electrochemical characterization. The alloy compositions can be tuned. The within the broad miscibility gap from Ag9Pt91 to Ag83Pt17 by controlling the ratios of PtCl42-/Ag+. The Au@Pt-Ag NRs show tunable surface plasmon resonance (SPR) and enhanced catalytic activity for methanol electro-oxidation, pointing to a potential future of nanometerized Pt-Ag alloys in fuel cells and other related fields. Apart from Pt-Ag. this strategy may be applied to the formation of Pt-related bimetallic (trimetallic) systems.

引用

页码：10505 / 10510

页数：6

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