Control of Metal Nanocrystal Size Reveals Metal-Support Interface Role for Ceria Catalysts

被引：1223

作者：

Cargnello, Matteo ^{[1
,2
]}

Doan-Nguyen, Vicky V. T. ^{[2
]}

Gordon, Thomas R. ^{[3
]}

Diaz, Rosa E. ^{[4
]}

Stach, Eric A. ^{[4
]}

Gorte, Raymond J. ^{[5
]}

Fornasiero, Paolo ^{[1
]}

Murray, Christopher B. ^{[2
,3
]}

机构：

[1] Univ Trieste, Dept Chem & Pharmaceut Sci, ICCOM CNR, Consortium INSTM, I-34127 Trieste, Italy

[2] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

[3] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA

[4] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[5] Univ Penn, Dept Chem & Biomol Engn, Philadelphia, PA 19104 USA

来源：

SCIENCE | 2013年 / 341卷 / 6147期

关键词：

CO OXIDATION-KINETICS; GAS SHIFT CATALYSIS; NANOPARTICLES; RH; PRESSURE; AU; PD;

D O I：

10.1126/science.1240148

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Interactions between ceria (CeO2) and supported metals greatly enhance rates for a number of important reactions. However, direct relationships between structure and function in these catalysts have been difficult to extract because the samples studied either were heterogeneous or were model systems dissimilar to working catalysts. We report rate measurements on samples in which the length of the ceria-metal interface was tailored by the use of monodisperse nickel, palladium, and platinum nanocrystals. We found that carbon monoxide oxidation in ceria-based catalysts is greatly enhanced at the ceria-metal interface sites for a range of group VIII metal catalysts, clarifying the pivotal role played by the support.

引用

页码：771 / 773

页数：3

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