A new synthetic method toward bimetallic ruthenium platinum nanoparticles; composition induced structural changes

被引:113
作者
Pan, C
Dassenoy, F
Casanove, MJ
Philippot, K
Amiens, C
Lecante, P
Mosset, A
Chaudret, B
机构
[1] CNRS, Chim Coordinat Lab, F-31077 Toulouse 04, France
[2] CNRS, CEMES, F-31055 Toulouse, France
关键词
D O I
10.1021/jp992072m
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
The reaction of Pt(dba)(2) with Ru(COD)(COT) in various proportions under dihydrogen in the presence of PVP leads to the formation of bimetallic nanoparticles of definite compositions resulting from the relative concentration of the two complexes in the initial solution, The progressive incorporation of ruthenium into the platinum matrix leads to structural changes from face-centered cubic (fcc) for high platinum contents to hexagonal close-packed (hcp) for high ruthenium contents. For the composition Pt1Ru3 a contraction of the size of the particles (ca. 1.1 nm) and of the size distribution indicates the presence of a new phase consisting of monodisperse particles for which a model of truncated twinned octahedrons of 79 atoms was proposed.
引用
收藏
页码:10098 / 10101
页数:4
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