Local atomic structure in disordered and nanocrystalline catalytic materials

被引：10

作者：

Dmowski, Wojtek ^{[1
]}

Egami, Takeshi ^{[1
,2
,3
]}

Swider-Lyons, Karen E. ^{[4
]}

Yan, Wen-Fu ^{[3
]}

Dai, Sheng ^{[3
]}

Overbury, Steven H. ^{[3
]}

机构：

[1] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[2] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[4] USN, Res Lab, Washington, DC 20375 USA

来源：

ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 2007年 / 222卷 / 11期

关键词：

pair distribution function; X-ray scattering; nanocrystalline materials; catalysts;

D O I：

10.1524/zkri.2007.222.11.617

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The power of the atomic pair density function method to study the local atomic structure of dispersed materials is discussed for three examples (I) supercapacitor hydrous ruthenia, (II) electroctalyst platinum-iron phosphate and (III) nanoparticle gold catalyst. Hydrous ruthenia appears to be amorphous, but was found to be nano-composite with RUO2 nanocrystals supporting electronic and hydrous boundaries protonic conductivity. A platinum-iron phosphate electrocatalyst, that exhibits activity for the oxygen reduction reaction has platinum in a nonmetallic state. In catalysts comprised of gold nanoparticles supported on TiO2, atomic correlations in the second atomic shell were observed suggesting interaction with the support that could modify gold chemical activity.

引用

页码：617 / 624

页数：8

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