以草酸为电子给体在Pt-TiO_2上光催化生成氢  

Photocatalytic Hydrogen Generation over Pt-TiO_2 with Oxalic Acid as Electron Donor

作　　者：李越湘[1] 吕功煊[1] 李树本[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,兰州730000

出　　处：《催化学报》2001年第2期212-214,共3页

基　　金：中国科学院重大项目! (KJ95 0 Al 5 0 5 0 2 );国家 973项目! (G2 0 0 0 0 2 64 )

摘　　要：以草酸为电子给体 ,研究了在Pt TiO2 上光催化生成氢的反应 .草酸的存在明显促进了生成氢的反应 ;二氧化钛负载Pt也明显提高了反应速率 ,Pt的最佳负载量为w(Pt) =0 .5 % .草酸浓度对氢生成反应的影响符合Lang muir关系式 .最佳 pH值为 2～The present work was carried out in order to couple photocatalytic hydrogen generation with degradation of pollutants. With oxalic acid as electron donor, the photocatalytic hydrogen generation over Pt-TiO2 has been investigated. Oxalic acid promotes hydrogen generation markedly. The hydrogen generation and the degradation of oxalic acid can be carried out simultaneously in this reaction system. The photocatalyst was prepared by photodeposition. The average Pt particle size measured by TEM is about 1 similar to 2 nm. Pt deposited on TiO2 also enhances the reaction rate notably. The optimal Pt amount deposited on TiO2 is omega (Pt) = 0. 5 %. Effect of the concentration of oxalic acid on the reaction rate is consistent with the Langmuir model. The optimal pH values for this reaction are between 2 and 4.

关 键 词：草酸 铂 二氧化钛 电子给体 氢气 光催化降解 水 制备 负载型光催化剂 光催化分解 

分 类 号：O643[理学—物理化学] O613[理学—化学]