Photocatalytic Hydrogen Generation Using Glucose and Sucrose as Electron Donors over Pt/TiO2

Chem. J. Chinese Universities

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Photocatalytic Hydrogen Generation Using Glucose and Sucrose as Electron Donors over Pt/TiO₂

LI Yue-Xiang¹, XIE Yan-Zhao¹, PENG Shao-Qin¹, L<SPAN lang=EN-US style=

1. Department of Chemistry, Nanchang University, Nanchang 330047, China;
2. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2006-01-17 Revised:1900-01-01 Online:2007-01-10 Published:2007-01-10
Contact: LI Yue-Xiang

Abstract

Abstract: Using glucose and sucrose as the electron donors, the photocatalytic hydrogen evolution over Pt/TiO₂ was investigated. Glucose and sucrose enhance notably the activity for hydrogen generation. The amounts of produced H₂ increase almost proportionally to time within 5 h irradiation in the reaction systems of the two electron donors. The effect of the initial concentration of glucose and sucrose on the reaction rate is consistent with the Langmuir-Hinshelwood kinetic model. After 5 h irradiation, the COD(chemical oxygen demand) in the reaction system of glucose and in that of sucrose decrease by 33.2%, 11.4% respectively. The effect of electron donors on the flat-band potential of conduction band of TiO₂ electrode was investigated. The flat-band potential of conduction band of TiO₂ electrode in the presence of the electron donors shifts negatively, and the shift in the presence of glucose is larger than that in the presence of sucrose due to glucose having a larger adsorption amount on TiO₂.

Key words: Photocatalysis, Hydrogen generation, Glucose, Sucrose, Pt/TiO₂

CLC Number:

O641

TrendMD:

LI Yue-Xiang¹, XIE Yan-Zhao¹, PENG Shao-Qin¹, L<SPAN lang=EN-US style=. Photocatalytic Hydrogen Generation Using Glucose and Sucrose as Electron Donors over Pt/TiO₂[J]. Chem. J. Chinese Universities, doi: .

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Photocatalytic Hydrogen Generation Using Glucose and Sucrose as Electron Donors over Pt/TiO₂

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