کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1269550 1497399 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rotating disk electrode study of Pt/Cs3HPMo11VO40 composite catalysts for performing and durable PEM fuel cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Rotating disk electrode study of Pt/Cs3HPMo11VO40 composite catalysts for performing and durable PEM fuel cells
چکیده انگلیسی


• A composite Pt/Cs3HPMo11VO40 catalyst for PEMFC is prepared.
• Electrochemical characterization with RRDE and Fuel Cell is performed.
• The polyoxometalates co-catalyst enhances Pt dispersion.
• The catalyst shows enhanced and durable activity toward HOR and ORR processes.
• The proposed catalyst allows to reduce Pt content maintaining performance.

A polyoxometalates (POM) of Kegging-type structure, Cs3HPMo11VO40 has been tested as mesoporous matrix to increase Pt electrocatalytic activity, by the enhancement of particles dispersion and active area. Physicochemical characterization has been carried out to clarify the structural properties of the matrix. SEM micrograph demonstrated a big change of the morphological features identifying POMs crystals with diameter less than 500 nm. The composite catalyst has been prepared by mixing the polyoxometalates with Pt/Vulcan XC72-R catalyst. By RRDE studies, an improvement in catalytic activity has been observed, both for HOR and ORR, for the layer modified with polyoxometalate matrix. Carbon monoxide adsorption/desorption processes have been also studied in order to evaluate any possible effect towards CO poisoning. Finally, the behavior of a fuel cell, prepared with a POM-modified cathode, was evaluated at 100% relative humidity, revealing that a lower Pt loading can be applied in presence of POM co-catalyst, yielding uncompromised and durable performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 26, 13 July 2016, Pages 11163–11173
نویسندگان
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