Interfacial Effects in Iron-Nickel Hydroxide-Platinum Nanoparticles Enhance Catalytic Oxidation

被引：605

作者：

Chen, Guangxu ^{[1
,2
]}

Zhao, Yun ^{[1
,2
]}

Fu, Gang ^{[1
,2
]}

Duchesne, Paul N. ^{[4
]}

Gu, Lin ^{[3
]}

Zheng, Yanping ^{[1
,2
]}

Weng, Xuefei ^{[1
,2
]}

Chen, Mingshu ^{[1
,2
]}

Zhang, Peng ^{[4
]}

Pao, Chih-Wen ^{[5
]}

Lee, Jyh-Fu ^{[5
]}

Zheng, Nanfeng ^{[1
,2
]}

机构：

[1] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Collaborat Innovat Ctr Chem Energy Mat, Natl Engn Lab Green Chem Prod Alcohols Ethers & E, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Dalhousie Univ, Dept Chem, Halifax, NS B3H 4R2, Canada

[5] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

来源：

SCIENCE | 2014年 / 344卷 / 6183期

基金：

加拿大自然科学与工程研究理事会;

关键词：

WATER; OXIDE; SURFACES; TRENDS; GOLD; CO;

D O I：

10.1126/science.1252553

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：

Hybrid metal nanoparticles can allow separate reaction steps to occur in close proximity at different metal sites and accelerate catalysis. We synthesized iron-nickel hydroxide-platinum (transition metal-OH-Pt) nanoparticles with diameters below 5 nanometers and showed that they are highly efficient for carbon monoxide (CO) oxidation catalysis at room temperature. We characterized the composition and structure of the transition metal-OH-Pt interface and showed that Ni2+ plays a key role in stabilizing the interface against dehydration. Density functional theory and isotope-labeling experiments revealed that the OH groups at the Fe3+-OH-Pt interfaces readily react with CO adsorbed nearby to directly yield carbon dioxide (CO2) and simultaneously produce coordinatively unsaturated Fe sites for O-2 activation. The oxide-supported PtFeNi nanocatalyst rapidly and fully removed CO from humid air without decay in activity for 1 month.

引用

页码：495 / 499

页数：5

共 26 条

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