Size Effect of Ruthenium Nanoparticles in Catalytic Carbon Monoxide Oxidation

被引：365

作者：

Joo, Sang Hoon

Park, Jeong Y.

Renzas, J. Russell

Butcher, Derek R.

Huang, Wenyu

Somorjai, Gabor A.

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 07期

关键词：

Ruthenium; nanoparticles; model nanocatalyst; CO oxidation; size effect; CO OXIDATION; IN-SITU; ATOMIC-SCALE; STEADY-STATE; SHAPE; PLATINUM; KINETICS; NANOCRYSTALS; METALS;

D O I：

10.1021/nl101700j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Carbon monoxide oxidation over ruthenium catalysts has shown an unusual catalytic behavior Here we report a particle size effect on CO oxidation over Ru nanoparticle (NP) catalysts Uniform Ru NPs with a tunable particle size from 2 to 6 nm were synthesized by a polyol reduction of Ru(acac)(3) precursor in the presence of poly(vinylpyrrolidone) stabilizer The measurement of catalytic activity of CO oxidation over two-dimensional Ru NPs arrays under oxidizing reaction conditions (40 Torr CO and 100 Torr O-2) showed an activity dependence on the Ru NP size The CO oxidation activity increases with NP size, and the 6 nm Ru NP catalyst shows 8-fold higher activity than the 2 nm catalysts The results gained from this study will provide the scientific basis for future design of Ru-based oxidation catalysts

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收藏

页码：2709 / 2713

页数：5

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