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Electrospun carbon nanofiber-supported Pt–Pd alloy composites for oxygen reduction

Published online by Cambridge University Press:  31 January 2011

Zhan Lin ,
Liwen Ji ,
Ozan Toprakci ,
Wendy Krause  and
Xiangwu Zhang
Xiangwu Zhang*
Affiliation:
Fiber and Polymer Science Program, Department of Textile Engineering, Chemistry and Science, North Carolina State University, Raleigh, North Carolina 27695-8301
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Carbon nanofiber-supported Pt–Pd alloy composites were prepared by co-electrodepositing Pt–Pd alloy nanoparticles directly onto electrospun carbon nanofibers. The morphology and size of Pt–Pd alloy nanoparticles were controlled by the surface treatment of carbon nanofibers and the electrodeposition duration time. Scanning electron microscopy/energy dispersive spectrometer (SEM)/(EDS) and x-ray photoelectron spectroscopy (XPS) were used to study the composition of Pt–Pd alloy on the composites, and the co-electrodeposition mechanism of Pt–Pd alloy was investigated. The resultant Pt–Pd/carbon nanofiber composites were characterized by running cyclic voltammograms in oxygen-saturated 0.1 M HClO4 at 25 °C to study their electrocatalytic ability to reduce oxygen. Results show that Pt–Pd/carbon nanofiber composites possess good performance in the electrocatalytic reduction of oxygen. Among all Pt–Pd/carbon nanofibers prepared, the nanofiber composite with a Pt–Pd loading of 0.90 mg/cm2 has the highest electrocatalytic activity by catalyst mass.

Keywords

Energy storageFiberNanostructure
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 7 , July 2010 , pp. 1329 - 1335
Copyright
Copyright © Materials Research Society 2010

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