γ-Fe2O3 nanoparticle surface controls PtFe nanoparticle growth and catalytic properties

被引：13

作者：

Gumina, Gregory ^{[1
]}

Easterday, Rosemary ^{[1
]}

Malyutin, Andrey G. ^{[1
]}

Budgin, Angela M. ^{[1
]}

Stein, Barry D. ^{[2
]}

Nikoshvili, Linda Zh. ^{[3
]}

Matveeva, Valentina G. ^{[3
]}

Sulman, Esther M. ^{[3
]}

Morgan, David Gene ^{[1
]}

Bronstein, Lyudmila M. ^{[1
,4
]}

机构：

[1] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA

[2] Indiana Univ, Dept Biol, Bloomington, IN 47405 USA

[3] Tver State Tech Univ, Dept Biotechnol & Chem, Tver 170026, Russia

[4] King Abdulaziz Univ, Jeddah 21413, Saudi Arabia

来源：

NANOSCALE | 2013年 / 5卷 / 07期

关键词：

FEPT NANOPARTICLES; OXYGEN REDUCTION; ALLOY NANOPARTICLES; OXIDATION;

D O I：

10.1039/c3nr33879g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a novel method for synthesis of alloy PtFe nanoparticles (NPs) of different compositions using gamma-Fe2O3 NPs as an iron source. We show here other growth mechanisms than conventional nucleation on a NP surface leading to core-shell NP or seeded NP growth. Depending on reaction conditions, different compositions of PtFe NPs can be obtained. PtFe NPs may coexist with gamma-Fe2O3 NPs in the reaction product. This mixture obtained in situ allows much higher catalytic activity in hydrogenation of methyl-3-buten-2-ol than that of only PtFe nanoparticles or merely mixed PtFe and gamma-Fe2O3 NPs. The presence of both PtFe and gamma-Fe2O3 NPs allows formation of dense and stable NP arrays which hold promise for catalytic applications in microreactors or other reactor designs where a catalytic film is favoured.

引用

页码：2921 / 2927

页数：7

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