Effects of heat treatment on the catalytic activity and methanol tolerance of carbon-supported platinum alloys

Simple item page
dc.contributor.authorValisi, Andiswa
dc.contributor.authorMaiyalagan, Thandavarayan
dc.contributor.authorKhotseng, Lindiwe
dc.contributor.authorLinkov, Vladimir
dc.contributor.authorPasupathi, Sivakumar
dc.date.accessioned2012-06-19T11:28:21Z
dc.date.available2012-06-19T11:28:21Z
dc.date.issued2012
dc.description.abstractThis work studies the effect of heat treatment of carbon-dispersed platinum and platinum alloys on its methanol tolerance and catalytic activity as gas diffusion electrodes for oxygen reduction reaction (ORR) in acid medium. The catalyst powders were subjected to heat treatments at three different temperatures for a fixed period at controlled atmospheres. Differences in catalyst morphology were characterized using X-ray diffraction, energy dispersive X-ray analysis and transmission electron microscope techniques. The electrochemical characteristics and activity of the electro-catalysts were evaluated for ORR and methanol tolerance using cyclic voltammetry, in the form of gas diffusion electrodes. The optimum heat-treatment temperature is found to be strongly dependent on the individual catalyst. The maximum ORR activity and better methanol tolerance for the oxygen reduction reaction (ORR) was observed in Pt-Fe/C and Pt-Cu/C catalysts subjected to heat treatment at 350 °C.A trend of catalytic activity for oxygen reduction reaction (ORR) was obtained: Pt-Cu/C (350°C)>Pt-Fe/C (350°C) > Pt-Ni/C (350°C) > Pt-Co/C (250°C) > Pt/C (350°C), showing that Pt-Cu/C-type catalysts had a higher catalytic activity with reasonable methanol tolerance.en_US
dc.identifier.citationValisi, A., et al. (2012). Effects of heat treatment on the catalytic activity and methanol tolerance of carbon-supported platinum alloys. Electrocatalysis, 3 (2): 108- 118 DOI: 10.1007/s12678-012-0081-6en_US
dc.identifier.issn1868-2529
dc.identifier.urihttp://hdl.handle.net/10566/343
dc.inquiriesspasupathi@uwc.ac.za;
dc.inquiriesmaiyalagan@gmail.com
dc.language.isoenen_US
dc.privacy.showsubmittertrue
dc.publisherSpringeren_US
dc.rightsThis is the author post-print of a paper published by Springer. All non-commercial applications are permitted subject to full acknowledgement of the authors and source.
dc.source.urihttp://dx.doi.org/10.1007/s12678-012-0081-6
dc.status.ispeerreviewedtrue
dc.subjectHeat treatmenten_US
dc.subjectOxygen reduction reaction (ORR)en_US
dc.subjectElectrocatalystsen_US
dc.subjectDirect methanol fuel cellsen_US
dc.subjectSinteringen_US
dc.titleEffects of heat treatment on the catalytic activity and methanol tolerance of carbon-supported platinum alloysen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
ValisiHeatTreatment2012.pdf
Size:
10.42 MB
Format:
Adobe Portable Document Format
Description:
Author final version
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.55 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Research Articles (SAIAMC)