کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
62281 47631 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low-temperature hydrocarbon combustion over proton conductor/metal–mixed catalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Low-temperature hydrocarbon combustion over proton conductor/metal–mixed catalysts
چکیده انگلیسی

Catalytic combustion of hydrocarbons is a highly active field of research, particularly in relation to the reduction of pollutant emissions from automobiles. In this study, we report on hydrocarbon oxidation at the internal interfaces of a mixed catalyst consisting of Sn0.9In0.1P2O7 and Pt powders. In a gaseous mixture of propane, H2O, and O2, the H2O dissociates into protons, electrons and active oxygen species at anodic interface sites, leading to oxidation of the hydrocarbon to CO2. On the other hand, O2 reacts with protons and electrons to form H2O at cathodic interface sites. As a consequence, local electrochemical cells are formed at the interfaces, and undergo self-discharge. It was shown that the mixed catalyst had a high turnover frequency for Pt, yielding high catalytic activity for Pt contents of as low as 0.1 wt% and an initiation temperature for hydrocarbon oxidation of 150 °C.

A micro-scale electrochemical reactor using a Sn0.9In0.2P2O7 + Pt catalyst provided two to four orders of magnitude higher catalytic activity for propane oxidation under stoichiometric conditions, compared to that of a reactor using a Pt/γ-Al2O3.Figure optionsDownload high-quality image (45 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 273, Issue 1, 7 July 2010, Pages 59–65
نویسندگان
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