کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
151071 456461 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Removal of CO in excess hydrogen over CuO/Ce1−xMnxO2 catalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Removal of CO in excess hydrogen over CuO/Ce1−xMnxO2 catalysts
چکیده انگلیسی

Ce1−xMnxO2 mixed oxides were used as supports for preparing 7%CuO/Ce1−xMnxO2 catalysts by impregnation for the preferential oxidation (PROX) of CO in excess hydrogen. Incorporating an appropriate amount of manganese into CeO2 to form Ce1−xMnxO2 solution increased the mobility of lattice oxygen and improved performance of CuO/Ce1−xMnxO2 catalysts in the PROX of CO. CO oxidation proceeded at the interfacial perimeter through an interaction between CuO clusters and Ce1−xMnxO2, involving not only the redox behavior of CeO2 but also that of MnOx. The PROX reaction was not weakened as the fraction of manganese incorporated in the 7%CuO/Ce1−xMnxO2 catalysts increased up to 0.3. A small amount of doped Mn4+ and an appropriate amount of incorporated Al2O3 could obtain a good candidate such as 7%CuO/Ce0.9Mn0.1O2-20%Al2O3 for a PROX unit in a polymer electrolyte membrane fuel cell system for removing CO. Its activity was comparable with, and its selectivity was much larger than, that of the noble catalyst 5%Pt/Al2O3.


• Incorporating Mn into CeO2 increased the mobility of lattice oxygen of Ce1−xMnxO2.
• The PROX reaction was improved over 7%CuO/Ce0.9Mn0.1O2 with a T100 of 90–95 ̊C.
• 7%CuO/Ce1−xMnxO2 catalysts were almost inactive in H2 oxidation below 105 °C.
• The selectivity of 7%CuO/Ce0.9Mn0.1O2-20%Al2O3 was much higher than 5%Pt/Al2O3.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 172, Issue 1, 1 August 2011, Pages 452–458
نویسندگان
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