کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1290917 973342 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Visible-light-induced hydrogen production over Pt-Eosin Y catalysts with high surface area silica gel as matrix
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Visible-light-induced hydrogen production over Pt-Eosin Y catalysts with high surface area silica gel as matrix
چکیده انگلیسی

A new system for the production of hydrogen, constructed using silica gel as a matrix, Eosin Y as a photosensitizer, and Pt as a cocatalyst, has been reported. It was found that the rate of photosensitized hydrogen evolution in the presence of silica gel is enhanced about 10-fold relative to the homogeneous phase, i.e. in the absence of silica gel. The pH value of the solution and the concentration of Eosin Y have remarkable effects on the rate of hydrogen evolution. The optimal pH and concentration of Eosin Y are 7 and 3.60 × 10−4 mol dm−3 (E/S = 1/3) to 7.24 × 10−4 mol dm−3 (E/S = 1/1), respectively. Triethanolamine (TEOA) as an electron donor, the rate of hydrogen evolution and the apparent quantum efficiency in the silica gel system under visible-light irradiation (λ ≥ 420 nm) can reach about 43 μmol h−1 and 10.4%, respectively. In addition, the roles of silica gel, Pt and TEOA, respectively; and the probable mechanism of photosensitized hydrogen evolution have been discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 166, Issue 1, 30 March 2007, Pages 74–79
نویسندگان
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