Toward to branched platinum nanoparticles by polyol reduction: A role of poly(vinylpyrrolidone) molecules

被引：48

作者：

Tsuji, Masaharu ^{[1
,2
]}

Jiang, Peng ^{[1
,4
]}

Hikino, Sachie ^{[1
,3
]}

Lim, Seongyop ^{[1
]}

Yano, Ryuto ^{[2
]}

Jang, Sang-Min ^{[2
]}

Yoon, Seong-Ho ^{[1
,2
,3
]}

Ishigami, Naoki ^{[2
]}

Tang, Xinling ^{[1
,4
]}

Kamarudin, Khairul Sozana Nor ^{[1
,5
]}

机构：

[1] Kyushu Univ, Inst Mat Chem & Engn, Fukuoka 8168580, Japan

[2] Kyushu Univ, Grad Sch Engn Sci, Dept Appl Sci Elect & Mat, Fukuoka 8168580, Japan

[3] Japanese Sci & Technol, CREST, Kawaguchi, Saitama 3320012, Japan

[4] Natl Ctr Nanosci & Technol, Beijing 100080, Peoples R China

[5] Univ Teknol Malaysia, Fac Chem & Nat Resources Engn, Dept Gas Engn, UTM Skudai 81310, Johor, Malaysia

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2008年 / 317卷 / 1-3期

关键词：

Pt nanocrystal; tri-pod; octa-pod; penta-pod; crystal growth; polyol method;

D O I：

10.1016/j.colsurfa.2007.09.030

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：

Branched Pt nanoparticles with nanometer sizes have been successfully synthesized by reduction of H2PtCl6 center dot 6H(2)O precursor in ethylene glycol (EG) in the presence of small amounts of NaNO3 and PVP Morphologies of the Pt nanoparticles can be systematically evolved from regular octahedron, and triangular plate via tri-pod, penta-pod, and octa-pod to multi-pod needle-like shapes only by decreasing concentrations of H2PtCl6 center dot 6H(2)O and NaNO3 at a constant NaNO3/H2PtCl6 center dot 6H(2)O molar ratio and the same PVP concentration. To the best of knowledge, this is the first report for the synthesis of Pt penta-pod. High resolution transmission electron microscope (TEM) observation of the Pt nanoparticles demonstrates that the Pt branches actually extendedly grow out from certain angles of triangular plates, octahedrons, and decahedrons, respectively. Multi-branched needle-like Pt nanocrystals are believed probably to originate from further anisotropic growth of the Pt octa-pods or overlap of small branched Pt nanoparticles. PVP molecules have been found to play an important role in controlling morphologies of the branch-like Pt nanoparticles besides NaNO3. It probably is the cooperated kinetic adsorption and desorption of PVP molecules and various anions on particle surfaces that influence the growth of the Pt nanoparticles. A reasonable growth mechanism has been suggested to explain the evolution of the Pt branches, in which the difference among growth rates along various crystallographic directions of face-centered cubic Pt crystal probably determines final morphologies of the Pt nanocrystals. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：23 / 31

页数：9

共 33 条

[1]

Antonios G. K., 2005, NANO LETT, V5, P2164

[2] Pt nanoparticles surfactant-directed assembled into colloidal spheres and used as substrates in forming Pt nanorods and nanowires [J].

Chen, Jingyi ;

Xiong, Yujie ;

Yin, Yadong ;

Xia, Younan .

SMALL, 2006, 2 (11) :1340-1343

[3] Polyol synthesis of platinum nanostructures: Control of morphology through the manipulation of reduction kinetics [J].

Chen, JY ;

Herricks, T ;

Xia, YN .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (17) :2589-2592

[4] Monopod, bipod, tripod, and tetrapod gold nanocrystals [J].

Chen, SH ;

Wang, ZL ;

Ballato, J ;

Foulger, SH ;

Carroll, DL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (52) :16186-16187

[5] FORMATION OF A POLYMER-PROTECTED PLATINUM SOL - A NEW UNDERSTANDING OF THE PARAMETERS CONTROLLING MORPHOLOGY [J].

DUFF, DG ;

EDWARDS, PP ;

JOHNSON, BFG .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (43) :15934-15944

[6] Controlled synthesis of platinum submicron and nanometric particles with novel shapes [J].

Elechiguerra, J. L. ;

Larios-Lopez, L. ;

Jose-Yacaman, M. .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 84 (1-2) :11-19

[7] Formation mechanism of Pt single-crystal nanoparticles in proton exchange membrane fuel cells [J].

Ferreira, P. J. ;

Shao-Horn, Yang .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2007, 10 (03) :B60-B63

[8] Polyol synthesis of platinum nanoparticles: Control of morphology with sodium nitrate [J].

Herricks, T ;

Chen, JY ;

Xia, YN .

NANO LETTERS, 2004, 4 (12) :2367-2371

[9] Photochemical formation of silver nanoparticles in poly(N-vinylpyrrolidone) [J].

Huang, HH ;

Ni, XP ;

Loy, GL ;

Chew, CH ;

Tan, KL ;

Loh, FC ;

Deng, JF ;

Xu, GQ .

LANGMUIR, 1996, 12 (04) :909-912

[10] Machinable long PVP-stabilized silver nanowires [J].

Jiang, P ;

Li, SY ;

Xie, SS ;

Gao, Y ;

Song, L .

CHEMISTRY-A EUROPEAN JOURNAL, 2004, 10 (19) :4817-4821

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