以葡萄糖为电子给体光催化还原水制氢的研究  

Photocatalytic Hydrogen Evolution over M/TiO_2 (M=Pt,Pd,Au,Rh)with Glucose as Electron Donor

作　　者：张晓杰[1] 储国海[1] 李树本[1] 吕功煊[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

出　　处：《分子催化》2007年第3期239-244,共6页Journal of Molecular Catalysis(China)

基　　金：国家重点基础研究专项经费(Nos.G200000264和2003CB214500);国家自然科学基金(No.90210027)资助项目

摘　　要：以葡萄糖为电子给体,研究了在M/TiO2(M=Pt,Pd,Au,Rh)催化剂上光催化还原水生成氢气的反应.重点考察了体系(或溶液)中溶解的气体和溶液的pH值对析氢速率的影响.实验结果表明,四种催化剂均能够有效地催化以葡萄糖为电子给体的光催化还原水制氢反应.溶液中溶解的一氧化碳和氧气对放氢反应有负面影响,析氢的最佳pH值约为5.本文还对可能的氧化反应机理进行了讨论,葡萄糖很可能经葡萄糖醛酸被氧化.With glucose as an electron donor, the photocatalytic activity for hydrogen evolution over M/TiO2 （M = Pt, Au, Pd and Rh） has been investigated. The effects of gas dissolved in the solution and pH value of the solution on the rates of hydrogen evolution have been studied. The experiments show that hydrogen can be produced efficiently under irradiation over M/TiO2 （M = Pt, Au, Pd and Rh）. The optimal pH value for hydrogen evolution is about 5. Oxygen and carbon monoxide dissolved in the solution affect remarkably the photoactivity for hydrogen evolution. By comparing various donors, we speculate that glucose may be oxidized through glucuronic acid.

关 键 词：葡萄糖 二氧化钛 光催化 制氢 

分 类 号：O643.32[理学—物理化学]