Facile fabrication of hollow Pt/Ag nanocomposites having enhanced catalytic properties

被引：73

作者：

Kim, Mee Rahn ^{[1
]}

Lee, Dong Ki ^{[1
]}

Jang, Du-Jeon ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Chem, Seoul 151742, South Korea

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 103卷 / 1-2期

关键词：

Catalysis; Galvanic displacement; Nanocomposite; Silver; Platinum; GALVANIC REPLACEMENT REACTION; SURFACE-PLASMON RESONANCE; RAMAN-SCATTERING; OPTICAL-PROPERTIES; SILVER NANORODS; AG; NANOPARTICLES; ALLOY; GOLD; NANOSTRUCTURES;

D O I：

10.1016/j.apcatb.2011.01.036

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：

Hollow Pt/Ag composite nanospheres, which show highly enhanced catalytic properties, have been prepared through a galvanic replacement reaction of silver nanoparticles dispersed in Ptn+-added water. Ptn+, prepared in advance by the partial reduction of Pt4+ with weak reducing agents, is readily reduced galvanically to form porous Pt shells, and concomitantly produced Ag+ diffuses out to produce hollow Pt/Ag nanocomposites finally. The residual silver has been further eliminated from the composites with 0.5 M HNO3(aq) to produce hollow Pt nanospheres. Hollow Pt/Ag composite nanostructures have been found to catalyze the degradation of rhodamine B efficiently in the presence of KBH4, although their catalytic performances depend highly on the metals, sizes, and shapes of the nanostructures. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：253 / 260

页数：8

共 48 条

[1] Surface-enhanced Raman scattering on nanoshells with tunable surface plasmon resonance [J].

Alvarez-Puebla, RA ;

Ross, DJ ;

Nazri, GA ;

Aroca, RF .

LANGMUIR, 2005, 21 (23) :10504-10508

[2]

Barbier J., 1997, Handbook of Heterogeneous Catalysis, V1, P257

[3] Semiconductor quantum dots and metal nanoparticles: syntheses, optical properties, and biological applications [J].

Biju, Vasudevanpillai ;

Itoh, Tamitake ;

Anas, Abdulaziz ;

Sujith, Athiyanathil ;

Ishikawa, Mitsuru .

ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 2008, 391 (07) :2469-2495

[4] Hydrodechlorination of tetrachloromethane on alumina- and silica-supported platinum catalysts [J].

Bonarowska, Magdalena ;

Kaszkur, Zbigniew ;

Kepinski, Leszek ;

Karpinski, Zbigniew .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2010, 99 (1-2) :248-256

[5] Facile Synthesis and Formation Mechanism of Metal Chalcogenides Hollow Nanoparticles [J].

Chen, Guoxin ;

Niu, Mutong ;

Cui, Lifeng ;

Bao, Feng ;

Zhou, Lihua ;

Wang, Yuansheng .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (18) :7522-7525

[6] Hollow platinum spheres with nano-channels: Synthesis and enhanced catalysis for oxygen reduction [J].

Chen, Hao Ming ;

Liu, Ru-Shi ;

Lo, Man-Yin ;

Chang, Sung-Chun ;

Tsai, Li-Duan ;

Peng, Yu-Min ;

Lee, Jyh-Fu .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (20) :7522-7526

[7] Optical properties of Pd-Ag and Pt-Ag nanoboxes synthesized via galvanic replacement reactions [J].

Chen, JY ;

Wiley, B ;

McLellan, J ;

Xiong, YJ ;

Li, ZY ;

Xia, YN .

NANO LETTERS, 2005, 5 (10) :2058-2062

[8] Graphitic carbon nanostructures via a facile microwave-induced solid-state process [J].

Chen, Kai ;

Wang, Chunlei ;

Ma, Ding ;

Huang, Weixin ;

Bao, Xinhe .

CHEMICAL COMMUNICATIONS, 2008, (24) :2765-2767

[9] Large triangular single crystals formed by mild annealing of self-organized silver nanocrystals [J].

Courty, A. ;

Henry, A.-I. ;

Goubet, N. ;

Pileni, M.-P. .

NATURE MATERIALS, 2007, 6 (11) :900-907

[10] Novel method to fabricate SiO2/Ag composite spheres and their catalytic, surface-enhanced Raman scattering properties [J].

Deng, Ziwei ;

Chen, Min ;

Wu, Limin .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (31) :11692-11698

← 1 2 3 4 5 →