studies on the photocatalytic hydrogen production by methanol reforming over Pt/TiO2 and Au/TiO2

• Main Authors: Mei-Ling Jheng, 鄭玫玲
• Other Authors: 楊思明
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/99579625343664492698

碩士 === 國立中央大學 === 材料科學與工程研究所 === 95 === In this study, we report the production of hydrogen by methanol reforming reaction under ultraviolet light irradiation (350 nm or 306 nm) over Pt/TiO2 and Au/TiO2. The effect of catalyst preparation methods, materials of the preparation and reaction vessels, and UV light sources are studied. The catalysts are characterized by XRD, TEM, ICP and BET. The catalyst Pt/TiO2 is prepared by photodeposition method. The activity for hydrogen production is higher when the catalyst is prepared in a quartz vessel instead of a glass vessel. Quartz is more transparent for UV light hence more Pt ions are reduced on the surface of TiO2 and higher activity is obtained. Higher activity is also observed in a quartz reaction vessel. The catalysts prepared with higher intensity and shorter wavelength UV light (306 nm) show higher activities. The particle sizes of Pt on TiO2 are smaller when Pt is deposited under higher intensity and shorter wavelength UV light, hence larger contact area between Pt and TiO2 is created. For Au/TiO2 catalysts, the activity is higher for catalyst prepared from deposition precipitation (DP) method than photodeposition method. The amounts of Au loading are similar in catalysts prepared from both methods; however, the particle size is smaller in catalyst prepared by DP method. The smaller metal particle sizes increase the more active sites in contact area between Au and TiO2 create.