fulltext.study @t Gmail

The catalytic activity and methanol tolerance of transition metal modified-ruthenium–selenium catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
48549 46512 2007 8 PDF Available
Title
The catalytic activity and methanol tolerance of transition metal modified-ruthenium–selenium catalysts
Abstract

The activity of ruthenium-based catalysts towards oxygen reduction was enhanced by addition of tungsten, molybdenum and rhodium. The catalysts were produced by decarbonylation of the ruthenium and transition metal carbonyls in the presence of selenium (sulphur) and carbon powders. The produced materials were characterised by scanning electron microscopy and energy dispersive spectroscopy as well as by electrochemical evaluations in both half cells and direct methanol fuel cells. All transition metal-modified catalysts exhibited better performance than those of ruthenium–selenium (sulphur) alone, but the tungsten modification seemed the best approach. The RuSe0.20W0.29 catalyst delivered the maximum power density of up to 40 mW cm−2. The improvement is a consequence of the enhanced activity towards oxygen reduction with a minor loss in methanol tolerance as well as a stabilising effect of tungsten on catalysts. The new catalysts were compared to Pt and to sulphur-containing catalysts.

Keywords
Direct methanol fuel cells; Oxygen reduction; Methanol tolerant cathode catalysts; Ruthenium–selenium–tungsten; Ruthenium–selenium–molybdenum; Ruthenium–selenium–rhodium
First Page Preview
The catalytic activity and methanol tolerance of transition metal modified-ruthenium–selenium catalysts
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
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 75, Issues 3–4, 26 September 2007, Pages 221–228
Authors
, , , , ,
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
Online Support
Any Questions? feel free to contact us