Bimetallic Au-Ni Nanoparticles Embedded in SiO2 Nanospheres: Synergetic Catalysis in Hydrolytic Dehydrogenation of Ammonia Borane

被引：192

作者：

Jiang, Hai-Long ^{[1
,3
]}

Umegaki, Tetsuo ^{[1
]}

Akita, Tomoki ^{[1
,3
]}

Zhang, Xin-Bo ^{[1
]}

Haruta, Masatake ^{[2
,3
]}

Xu, Qiang ^{[1
,3
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Osaka 5638577, Japan

[2] Tokyo Metropolitan Univ, Grad Sch Urban Environm Sci, Tokyo 1920397, Japan

[3] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2010年 / 16卷 / 10期

关键词：

dehydrogenation; gold; heterogeneous catalysis; nanoparticles; nickel; CHEMICAL HYDROGEN STORAGE; HIGHLY-ACTIVE CATALYSTS; CO OXIDATION; GOLD NANOPARTICLES; ALLOY NANOPARTICLES; GENERATION SYSTEM; ROOM-TEMPERATURE; CARBON-MONOXIDE; CLUSTERS; DISSOCIATION;

D O I：

10.1002/chem.200902829

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Gold-nickel nanoparticles (NPs) of 3-4 nm diameter embedded in silica nanospheres of around 15 nm have been prepared by using [Au(en)(2)Cl-3] and [Ni(NH3)(6)Cl-2] as precursors in a NP-5/cyclohexane reversed-micelle system, and by in situ reduction in an aqueous solution of NaBH4/NH3BH3. Compared with monometallic Au@SiO2 and Ni@SiO2, the as-synthesized Au-Ni@SiO2, catalyst shows higher catalytic activity and better durability in the hydrolysis of ammonia borane, generating a nearly stoichiometric amount of hydrogen. During the generation of H-2 the synergy effect between gold and nickel is apparent: The nickel species stabilizes the gold NPs and the existence of gold helps to improve the catalytic activity and durability of the nickel NPs.

引用

页码：3132 / 3137

页数：6

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