Pt/TiO_2光催化分解四硼酸钾水溶液制氢  

Photocatalytic Hydrogen Production From Aqueous Solution of Potassium Tetraborate using Platinum-loaded TiO_2 Powder

作　　者：靳治良[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,甘肃兰州730000

出　　处：《分子催化》2005年第2期150-154,共5页Journal of Molecular Catalysis(China)

基　　金：973资助项目(No.G200000264;2003CB214503).

摘　　要：研究了以四硼酸钾溶液作反应体系,在1%Pt/TiO2光催化剂的作用下光催化分解水制氢的反应,发现该体系能使放氢速率明显提高.放氢速率还随B4O72-浓度的增大而增大.在此基础上,还对B4O72-的作用机理进行了探讨,B4O72-在该反应体系中主要是通过物理作用有效的阻止了逆反应的发生,从而使放氢速率得以提高.It is one of an important aspect to construct a new photocatalytic reaction system. In this paper, a new type of water splitting system with significant enhancement effect of hydrogen evolution using Pt-loaded TiO_2 photocatalysts is present. It is found that the rate of hydrogen evolution increased with addition of B_4O_7^(2-) anion. The main role of B_4O_7^(2-) anion on water splitting is speculated to be a physical action. B_4O_7^(2-) anion does not act as a sacrificial donor. In addition, it is found that the yield of H_2 for the photocatalytic decomposition of water over Pt/TiO_2 photocatalyst depends on the direction of light irradiation.

关 键 词：四硼酸钾 光催化 分解水制氢 

分 类 号：O643.32[理学—物理化学]