Fabrication and Characterization of High-activity Pt/C Electrocatalysts for Oxygen Reduction

Title
Fabrication and Characterization of High-activity Pt/C Electrocatalysts for Oxygen Reduction
Authors
임보라미김정운황승준유성종조은애임태훈김수길
Keywords
PEMFC; Pt/C; Polyol; Oxygen reduction; Mass activity
Issue Date
2010-06
Publisher
Bulletin of the Korean Chemical Society
Citation
VOL 31, NO 6, 1577-1582
Abstract
A 20 wt % Pt/C is fabricated and characterized for use as the cathode catalyst in a polymer electrolyte membrane fuel cell (PEMFC). By using the polyol method, the fabrication process is optimized by modifying the carbon addition sequence and precursor mixing conditions. The crystallographic structure, particle size, dispersion, and activity toward oxygen reduction of the as-prepared catalysts are compared with those of commercial Pt/C catalysts. The most effective catalyst is obtained by ultrasonic treatment of ethylene glycol-carbon mixture and immediate mixing of this mixture with a Pt precursor at the beginning of the synthesis. The catalyst exhibits very uniform particle size distribution without agglomeration. The mass activities of the as-prepared catalyst are 13.4 mA/mgPt and 51.0 mA/mgPt at 0.9 V and 0.85 V, respectively, which are about 1.7 times higher than those of commercial catalysts.
URI
http://pubs.kist.re.kr/handle/201004/37480
ISSN
0253-2964
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE