Preparation of Pt/Rh bimetallic colloidal particles in polymer solutions using borohydride-reduction

Masafumi Harada, Hisahiro Einaga

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Colloidal dispersions of Pt/Rh bimetallic particles have been synthesized by the reduction of Pt(IV)/Rh(III) ionic solutions by using borohydride-reduction in the presence of poly(N-vinyl-2-pyrrolidone). The size and the structure of the synthesized particles have been examined by transmission electron micrograph (TEM) and extended X-ray absorption fine structure (EXAFS). We have succeeded in producing the bimetallic Pt/Rh particles with an average diameter of 2.8 nm in polymer solutions by the stepwise addition of sodium borohydride aqueous solution. The distribution of different metallic species in a particle tended to be "cluster-in-cluster" structure, in contrast to the bimetallic particle with an average diameter of 1.4 nm synthesized by alcohol-reduction which have a core-shell structure.

Original languageEnglish
Pages (from-to)568-572
Number of pages5
JournalJournal of Colloid And Interface Science
Volume308
Issue number2
DOIs
Publication statusPublished - Apr 15 2007

Fingerprint

Borohydrides
borohydrides
Polymer solutions
preparation
polymers
X ray absorption
Dispersions
Alcohols
Sodium
Electrons
alcohols
fine structure
sodium
aqueous solutions
electrons
x rays

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Cite this

Preparation of Pt/Rh bimetallic colloidal particles in polymer solutions using borohydride-reduction. / Harada, Masafumi; Einaga, Hisahiro.

In: Journal of Colloid And Interface Science, Vol. 308, No. 2, 15.04.2007, p. 568-572.

Research output: Contribution to journalArticle

@article{b5ef273ddc97401f8bcc86acf8326859,
title = "Preparation of Pt/Rh bimetallic colloidal particles in polymer solutions using borohydride-reduction",
abstract = "Colloidal dispersions of Pt/Rh bimetallic particles have been synthesized by the reduction of Pt(IV)/Rh(III) ionic solutions by using borohydride-reduction in the presence of poly(N-vinyl-2-pyrrolidone). The size and the structure of the synthesized particles have been examined by transmission electron micrograph (TEM) and extended X-ray absorption fine structure (EXAFS). We have succeeded in producing the bimetallic Pt/Rh particles with an average diameter of 2.8 nm in polymer solutions by the stepwise addition of sodium borohydride aqueous solution. The distribution of different metallic species in a particle tended to be {"}cluster-in-cluster{"} structure, in contrast to the bimetallic particle with an average diameter of 1.4 nm synthesized by alcohol-reduction which have a core-shell structure.",
author = "Masafumi Harada and Hisahiro Einaga",
year = "2007",
month = "4",
day = "15",
doi = "10.1016/j.jcis.2007.01.026",
language = "English",
volume = "308",
pages = "568--572",
journal = "Journal of Colloid and Interface Science",
issn = "0021-9797",
publisher = "Academic Press Inc.",
number = "2",

}

TY - JOUR

T1 - Preparation of Pt/Rh bimetallic colloidal particles in polymer solutions using borohydride-reduction

AU - Harada, Masafumi

AU - Einaga, Hisahiro

PY - 2007/4/15

Y1 - 2007/4/15

N2 - Colloidal dispersions of Pt/Rh bimetallic particles have been synthesized by the reduction of Pt(IV)/Rh(III) ionic solutions by using borohydride-reduction in the presence of poly(N-vinyl-2-pyrrolidone). The size and the structure of the synthesized particles have been examined by transmission electron micrograph (TEM) and extended X-ray absorption fine structure (EXAFS). We have succeeded in producing the bimetallic Pt/Rh particles with an average diameter of 2.8 nm in polymer solutions by the stepwise addition of sodium borohydride aqueous solution. The distribution of different metallic species in a particle tended to be "cluster-in-cluster" structure, in contrast to the bimetallic particle with an average diameter of 1.4 nm synthesized by alcohol-reduction which have a core-shell structure.

AB - Colloidal dispersions of Pt/Rh bimetallic particles have been synthesized by the reduction of Pt(IV)/Rh(III) ionic solutions by using borohydride-reduction in the presence of poly(N-vinyl-2-pyrrolidone). The size and the structure of the synthesized particles have been examined by transmission electron micrograph (TEM) and extended X-ray absorption fine structure (EXAFS). We have succeeded in producing the bimetallic Pt/Rh particles with an average diameter of 2.8 nm in polymer solutions by the stepwise addition of sodium borohydride aqueous solution. The distribution of different metallic species in a particle tended to be "cluster-in-cluster" structure, in contrast to the bimetallic particle with an average diameter of 1.4 nm synthesized by alcohol-reduction which have a core-shell structure.

UR - http://www.scopus.com/inward/record.url?scp=33847209868&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847209868&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2007.01.026

DO - 10.1016/j.jcis.2007.01.026

M3 - Article

C2 - 17291519

AN - SCOPUS:33847209868

VL - 308

SP - 568

EP - 572

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

SN - 0021-9797

IS - 2

ER -