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Facile fabrication of hollow Pt/Ag nanocomposites having enhanced catalytic properties

Paper ID Volume ID Publish Year Pages File Format Full-Text
47017 46455 2011 8 PDF Available
Title
Facile fabrication of hollow Pt/Ag nanocomposites having enhanced catalytic properties
Abstract

Hollow Pt/Ag composite nanospheres, which show highly enhanced catalytic properties, have been prepared through a galvanic replacement reaction of silver nanoparticles dispersed in Ptn+-added water. Ptn+, prepared in advance by the partial reduction of Pt4+ with weak reducing agents, is readily reduced galvanically to form porous Pt shells, and concomitantly produced Ag+ diffuses out to produce hollow Pt/Ag nanocomposites finally. The residual silver has been further eliminated from the composites with 0.5 M HNO3(aq) to produce hollow Pt nanospheres. Hollow Pt/Ag composite nanostructures have been found to catalyze the degradation of rhodamine B efficiently in the presence of KBH4, although their catalytic performances depend highly on the metals, sizes, and shapes of the nanostructures.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Hollow Pt/Ag composite nanospheres show highly enhanced catalytic properties. ► Hollow Pt/Ag nanospheres have been prepared through a galvanic replacement reaction. ► Hollow Pt/Ag nanostructures catalyze the degradation of rhodamine B efficiently in the presence of KBH4. ► Their catalytic performances depend highly on the sizes of the nanostructures.

Keywords
Catalysis; Galvanic displacement; Nanocomposite; Silver; Platinum
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Facile fabrication of hollow Pt/Ag nanocomposites having enhanced catalytic properties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 103, Issues 1–2, 14 March 2011, Pages 253–260
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us