fulltext.study @t Gmail

Highly loaded carbon black supported Pt catalysts for fuel cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
53668 46978 2015 9 PDF Available
Title
Highly loaded carbon black supported Pt catalysts for fuel cells
Abstract

•Carbon black supports with surface area 226, 384 and 808 m2 g−1 compared.•Deposition of PtO2, H2PtCl6, Pt(C5H7O2)2, Pt(NH3)4(NO3)2, and Pt(NH3)2(NO2)2.•H2PtCl6 most suitable by H2 chemisorption and electrochemical RDE analysis.•Dechlorination of the catalysts developed by NaOH and water washing.•Better electrochemical stability of the carbon ExpCB with S(NE) = 384 m2 g−1.

A commercial high surface area carbon black (808 m2 g−1), low surface area carbon black (226 m2 g−1) and an experimental grade medium surface area carbon black (ExpCB, 384 m2 g−1) were studied as supports for platinum deposition: (i) from true solutions of H2PtCl6, Pt(C5H7O2)2, Pt(NH3)4(NO3)2, or Pt(NH3)2(NO2)2, and (ii) from fine slurries of Pt(C5H7O2)2 or PtO2 to achieve high Pt loadings of 60 wt.%. Temperature programmed reduction (TPR) revealed that PtO2, H2PtCl6, Pt(C5H7O2)2, Pt(NH3)4(NO3)2, and Pt(NH3)2(NO2)2 deposited on carbon blacks were reduced to metallic Pt at 0, 70, 120, 140, 150 °C, respectively. Cyclic voltammetry (CV) was carried out on electrodes prepared from selected catalyst materials on a rotating-disc electrode (RDE). The electrochemically active surface area (ESA) of the platinum and electrocatalytic activities towards the oxygen-reduction reaction (ORR) were evaluated from the RDE measurements, in which also the stability towards electrochemical ageing was investigated. These analyses indicated that impregnation by H2PtCl6 is the most suitable of the studied catalyst synthesis methods. Mass-specific ORR activities similar to that of commercial reference catalyst are obtained. Catalysts prepared on carbon ExpCB showed greater stability than those based on 350G. Further increase in stability results from dechlorination of the catalyst.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (245 K)Download as PowerPoint slide

Keywords
Carbon black; Pt; Pt/C; Fuel cell; Pt deposition; Electrocatalyst
First Page Preview
Highly loaded carbon black supported Pt catalysts for fuel cells
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: Catalysis Today - Volume 256, Part 2, 1 November 2015, Pages 375–383
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