کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1287594 | 973228 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Selective CO oxidation in the presence of H2 over Pt and Pt-Sn catalysts supported on niobia
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
An essential requirement for the proton exchange membrane fuel cell (PEMFC) is to deliver clean H2 to the anode electrode, the kinetics of which are greatly hindered by traces of CO present from the upstream hydrocarbon reforming and water–gas shift processes. The removal of CO from hydrogen-rich stream to a PEMFC tolerant level, by selective oxidation (SELOX) of CO, has been studied over 1%Pt/Al2O3, 1%Pt-1%Sn/Al2O3, 1%Pt/Nb2O5 and 1%Pt-1%Sn/Nb2O5 catalysts. The Nb2O5-supported catalysts presented higher activity in SELOX reaction at low temperatures, but with lower CO selectivity. The results were explained in terms of platinum modification by the presence of niobia (SMSI effect) and tin (bimetallic effect).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 158, Issue 1, 14 July 2006, Pages 504–508
Journal: Journal of Power Sources - Volume 158, Issue 1, 14 July 2006, Pages 504–508
نویسندگان
Príscila Marques, Nielson F.P. Ribeiro, Martin Schmal, Donato A.G. Aranda, Mariana M.V.M. Souza,