A high-throughput search for direct methanol fuel cell anode electrocatalysts of type PtxBiyPbz
We used a high-throughput method to screen for direct methanol fuel cell anode electrocatalysts in the Pt-Bi-Pb system. Previous studies showed that PtBi and PtPb (both NiAs structure type) were active electrocatalysts for the oxidation of formic acid, but only PtPb was active in oxidizing methanol....
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Published in | Applied surface science Vol. 254; no. 3; pp. 653 - 661 |
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Main Authors | , , , , , , , |
Format | Conference Proceeding Journal Article |
Language | English |
Published |
Amsterdam
Elsevier Science
30.11.2007
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Subjects | |
Online Access | Get full text |
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Summary: | We used a high-throughput method to screen for direct methanol fuel cell anode electrocatalysts in the Pt-Bi-Pb system. Previous studies showed that PtBi and PtPb (both NiAs structure type) were active electrocatalysts for the oxidation of formic acid, but only PtPb was active in oxidizing methanol. We synthesized thin films with continuous composition spreads of the three elements by magnetron sputtering at deposition temperatures from ambient to 510 deg C. A fluorescence method was then used to identify compositions that were active toward methanol oxidation. Only films deposited between temperatures of 160 and 400 deg C showed electrocatalytic activity. The areas that were active for methanol oxidation showed predominantly the NiAs structure type according to XRD, with optimal activity for compositions near PtBi0.01Pb0.53. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0169-4332 1873-5584 |
DOI: | 10.1016/j.apsusc.2007.06.077 |