کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5365587 1388333 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A high-throughput search for direct methanol fuel cell anode electrocatalysts of type PtxBiyPbz
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
A high-throughput search for direct methanol fuel cell anode electrocatalysts of type PtxBiyPbz
چکیده انگلیسی

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 °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 °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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 254, Issue 3, 30 November 2007, Pages 653-661
نویسندگان
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