KCS Publications

HOME > Search > Browsing(BKCS) > Archives

Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 5
BKCSDE 30(5)
May 20, 2009

Title	Enhanced Hydrogen Production from Methanol/Water Photo-Splitting in TiO₂ Including Pd Component
Author	Byeong Sub Kwak, Jinho Chae, Jiyeon Kim, Misook Kang*
Keywords	Pd-TiO₂, Photo catalysis, Water splitting, H2 production, Pd-impregnated TiO₂
Abstract	The future use of hydrogen as an energy source is expected to increase on account of its environmentally friendliness. In order to enhance the production of hydrogen, Pd ions (0.01, 0.05, 0.1, and 0.5 mol%) were incorporated TiO₂ (Pd-TiO₂) and used as a photocatalyst. The UV-visible absorbance decreased with increasing level of palladium incorporation without a wavelength shift. Although all the absorption plots showed excitation characteristics, there was an asymmetric tail observed towards a higher wavelength caused by scattering. However, the intensity of the photoluminescence (PL) curves of Pd-TiO₂ was smaller, with the smallest case being observed at 0.1 and 0.5 mol% Pd-TiO₂, which was attributedto recombination between the excited electrons and holes. Based on these optical characteristics, the evolution of H₂ from methanol/water (1:1) photo-splitting over Pd-TiO₂ in the liquid system was enhanced, compared with that over pure TiO₂. In particular, 2.4 mL of H₂ gas was produced after 8 h when 0.5 g of a 1.0 mol% Pd-TiO₂ catalyst was used. H₂ was stably evolved even after 28 h without catalytic deactivation, and the amount of H₂ produced reached 14.5 mL after 28 h. This is in contrast to the case of the Pd 0.1 mol% impregnated TiO₂ of H₂ evolution of 17.5 mL due to the more decreasedelectron-hole recombination.
Page	1047 - 1053
Full Text	PDF

How to access to the WOL for The Bulletin of the Korean Chemical Society ?

The Bulletin of the Korean Chemical Society will be co-published with Wiley-VCH from 2015 towards. The online version of the Journal will thus be available on Wiley Online Library, Wiley(-VCH)'s global online platform.

KCS members can get a free online access to the Bulletin of the Korean Chemical Society in WOL.

Free Access to WOL