Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (07): 755-758.doi: 10.3866/PKU.WHXB20040718

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Hydrogen Production by Pt/TiO2 Anaerobic Photocatalytic Reforming Degradation of Aqueous Monoethanolamine

Wu Yu-Qi;Lü Gong-Xuan;Li Shu-Ben   

  1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000
  • Received:2003-12-16 Revised:2004-02-16 Published:2004-07-15
  • Contact: Lü Gong-Xuan E-mail:gxlu@ns.lzb.ac.cn

Abstract: The production of hydrogen by anaerobic photocatalytic reforming degradation of aqueous monoethanolamine (ethanolamine, shortened form in the following text)solution has been investigated using a Pt/TiO2 catalyst. The effect of many factors such as ethanolamine concentration, catalyst surface chemical state, and pH of systems on the photocatalytic production of hydrogen have been studied in detail. The catalyst and the products were characterized using HNMR, XRD and XPS techniques; the possible reaction mechanism was discussed. The hydrogen production was achieved simultaneously with the photocatalytic reforming degradation of aqueous ethanolamine solution. It was showed that the aim of both producing hydrogen and photocatalytic reforming degradation of aqueous organic pollutant could be achieved using a Pt/TiO2 catalyst. The Pt particles were identified as existed in Pt0 state on the TiO2. The pH and the ethanolamine concentration affect the hydrogen production rate significantly. At the same time, it was found that the optimum concentration of ethanolamine, pH value and Pt loading is 0.05 mol•L-1, 4~10 and 0.5%~1.0% respectively. And the amino substituted carbonyl compounds was the main intermediates.

Key words: Photocatalytic reforming, Degradation, Monoethanolamine, Pt/TiO2, H2 production