NaBH4-assisted ethylene glycol reduction for preparation of carbon-supported Pt catalyst for methanol electro-oxidation

A carbon-supported Pt catalyst (40wt.% loading) is prepared by a modified ethylene glycol reduction method (Pt-EG-complex). In this procedure, a complex produced by reacting ethylene glycol with sodium borohydride (NaBH4), serves as a reducing agent for the Pt precursor and as a stabilizer for preve...

Full description

Saved in:
Bibliographic Details
Published in:Journal of power sources 2006-10, Vol.160 (2), p.987-990
Main Authors: KIM, Pil, JI BONG JOO, KIM, Wooyoung, KIM, Jongsik, IN KYU SONG, YI, Jongheop
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A carbon-supported Pt catalyst (40wt.% loading) is prepared by a modified ethylene glycol reduction method (Pt-EG-complex). In this procedure, a complex produced by reacting ethylene glycol with sodium borohydride (NaBH4), serves as a reducing agent for the Pt precursor and as a stabilizer for preventing the growth of Pt particles. For purposes of comparison, two types of carbon-supported Pt catalyst (40wt.% loading) are also prepared by a NaBH4 reduction method, in which the Pt precursor is reduced in a ethylene glycol solution (Pt-EG-NaBH4) and in de-ionized water (Pt-H2O-NaBH4). Analysis by X-ray diffraction and transmission electron microscopy reveal that the Pt-EG-complex catalyst is comprised of highly-dispersed Pt nanoparticles with a uniform size (2.9-3.1nm) on the carbon support, while large Pt particles are observed in the Pt-EG-NaBH4 (3.3-3.6nm) and Pt-H2O-NaBH4 (5.7-6.2nm) catalysts. The Pt-EG-complex catalyst has the highest electrochemical surface area and shows the highest catalytic performance for methanol electro-oxidation.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2006.02.050