Controlled Growth of Platinum Nanoparticles on Strontium Titanate Nanocubes by Atomic Layer Deposition

被引：152

作者：

Christensen, Steven T. ^{[1
]}

Elam, Jeffrey W. ^{[2
]}

Rabuffetti, Federico A. ^{[3
]}

Ma, Qing ^{[4
]}

Weigand, Steven J. ^{[4
]}

Lee, Byeongdu ^{[5
]}

Seifert, Soenke ^{[5
]}

Stair, Peter C. ^{[3
]}

Poeppelmeier, Kenneth R. ^{[3
]}

Hersam, Mark C. ^{[1
,3
]}

Bedzyk, Michael J. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[2] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA

[3] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[4] Northwestern Univ, DND CAT Synchrotron Res Ctr, Evanston, IL 60208 USA

[5] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA

来源：

SMALL | 2009年 / 5卷 / 06期

基金：

美国国家科学基金会;

关键词：

atomic layer deposition; nanoparticles; platinum; strontium titanate; X-ray analysis; PARTICLE-SIZE; METHANOL; FORMALDEHYDE; OXIDATION; CATALYSTS; SPECTROSCOPY; PRINCIPLES; HYDROGEN; ALUMINA; WATER;

D O I：

10.1002/smll.200801920

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

With an eye toward using surface morphology to enhance heterogeneous catalysis, Pt nanoparticles are grown by atomic layer deposition (ALD) on the surfaces of SrTiO3 nanocubes. The size, dispersion, and chemical state of the Pt nanoparticles are controlled by the number of ALD growth cycles. The SrTiO3 nanocubes average 60 nm on a side with {001} faces. The Pt loading increases linearly with Pt ALD cycles to a value of 1.1 X 10(-6) g cm(-2) after five cycles. Scanning electron microscopy images reveal discrete, well-dispersed Pt nanoparticles. Small- and wide-angle X-ray scattering show that the Pt nanoparticle spacing and size increase as the number of ALD cycles increases. X-ray absorption spectroscopy shows a progression from platinum(II) oxide to metallic platinum and a decrease in Pt-O bonding with an increase in Pt-Pt bonding as the number of ALD cycles increases.

引用

页码：750 / 757

页数：8

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