کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
182505 459430 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanoporous TiO2-supported bimetallic catalysts for methanol oxidation in acidic media
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Nanoporous TiO2-supported bimetallic catalysts for methanol oxidation in acidic media
چکیده انگلیسی

New dynamic aspects of the catalysis of methanol oxidation reaction have been studied. The submonolayer films of bi-functional catalysts (PtRu) were deposited on novel nanostructured supporting materials, designed with the goal of achieving high variability of their electronic and chemical properties to influence the catalytic activity of sub-monolayer catalyst. The mesoscopic TiO2 supporting film formation was investigated using EQCN, voltammetric, and AFM techniques. The conditions for the formation of monodispersed TiO2 nanoparticles with regular nanopores, 20–80 nm in diameter, were described. It follows from EQCN and voltammetric measurements and AFM image analysis that the nanopores are formed by a dissolution–precipitation mechanism. The activity of submonolayer catalysts PtRu deposited on nanoporous TiO2−n films was investigated using the point defect formation voltammetry. A lower poisoning effect for cluster PtRu on a TiO2 support film than that for unsupported PtRu and bare Pt catalysts has been observed. The implications of the support–catalyst interactions are discussed in details.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 8, Issue 9, September 2006, Pages 1439–1444
نویسندگان
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