催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (2): 105-107.

• 研究快讯 • 上一篇    下一篇

Pt/TiO2光催化分解甲酸制氢反应的原位红外光谱研究

陈涛1,2,吴国鹏1,2,冯兆池1,胡庚申1,2,苏伟光1,2,应品良1,李灿1   

  1. 1 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连 116023; 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2008-02-25 出版日期:2008-02-25 发布日期:2012-01-15

In Situ FT-IR Study of Photocatalytic Decomposition of Formic Acid to Hydrogen on Pt/TiO2 Catalyst

CHEN Tao1,2, WU Guopeng1,2, FENG Zhaochi1, HU Gengshen1,2, SU Weiguang1,2, YING Pinliang1, LI Can1*   

  1. 1 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-02-25 Online:2008-02-25 Published:2012-01-15

PDF

1073

被引次数

45

摘要： 用原位红外光谱研究了无氧条件下Pt/TiO2光催化甲酸制氢反应机理. 结果表明,物理吸附的甲酸物种在光催化反应过程中向甲酸根离子转化,而甲酸根离子则逐渐向碳酸盐物种转化. 水蒸气的添加显著促进了甲酸在Pt/TiO2上光催化反应的进行,并提高了产氢效率. 提出了该光催化反应的可能机理.

关键词: 甲酸, 铂, 二氧化钛, 光催化, 红外光谱

Abstract: The anaerobic photocatalytic decomposition of formic acid to hydrogen on Pt/TiO2 was studied by in situ FT-IR spectroscopy. The molecularly adsorbed formic acid species is transformed to a formate species, and the formate species is transformed to carbonates during this reaction. The addition of water vapor in the reaction system strongly accelerates this photocatalytic reaction and promotes the H2 production efficiency. The possible mechanism of the reaction is proposed.

Key words: formic acid, platinum, titanium dioxide, photocatalysis, infrared spectroscopy