Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7722499 | International Journal of Hydrogen Energy | 2013 | 8 Pages |
Abstract
Photocatalyst powders of SrTi1âxMoxO3 and Sr1â2xNa2xTi1âxMoxO3 were prepared by spray pyrolysis for hydrogen evolution for the first time from aqueous methanol solution under visible light irradiation. The co-doping of Mo6+/Na+ ions resulted in increase of BET surface area and pore volume, and formation of unique morphology with wrinkled, furrowed and porous surface, without significant distortion of lattice structure of host material. The hydrogen evolution rate of Sr1â2xNa2xTi1âxMoxO3 photocatalyst was enhanced up to 1115.8 μmol gâ1 hâ1 with an induction period of 1 h under visible light irradiation, which was 1.5 times higher than that of SrTi1âxMoxO3. The co-dopant Na+ ion contributed to the charge balance in the host material by compromising the excess positive charge of Mo6+, which was effective for enhancing the hydrogen evolution rate. The optimum composition of photocatalyst corresponding to the maximum hydrogen evolution rate was Sr1â2xNa2xTi1âxMoxO3 (x = 0.004).
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Hyun Woo Kang, Seung Bin Park, Ah-Hyung Alissa Park,