Effect of noble metals loaded TiO<sub>2</sub> on the selectivity of photocatalytic CO<sub>2</sub> reduction

HAO Rui-peng; YANG Peng-ju; WANG Zhi-jian; ZHU Zhen-ping

Volume 43 Issue 01

Jan. 2015

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Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(01): 94-99

HAO Rui-peng, YANG Peng-ju, WANG Zhi-jian, ZHU Zhen-ping. Effect of noble metals loaded TiO2 on the selectivity of photocatalytic CO2 reduction[J]. Journal of Fuel Chemistry and Technology, 2015, 43(01): 94-99.

Citation:

HAO Rui-peng, YANG Peng-ju, WANG Zhi-jian, ZHU Zhen-ping. Effect of noble metals loaded TiO₂ on the selectivity of photocatalytic CO₂ reduction[J]. Journal of Fuel Chemistry and Technology, 2015, 43(01): 94-99.

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Effect of noble metals loaded TiO₂ on the selectivity of photocatalytic CO₂ reduction

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2014-09-25
Rev Recd Date: 2014-10-22
Publish Date: 2015-01-30

Abstract

Abstract

The TiO₂ photocatalyst loaded with 1% Pt, Pd, Au, Ag have been prepared by photo deposition method. The catalysts are characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-vis spectrometer. The electro-catalytic performance for hydrogen production and photo electrochemical performance are investigated by using linear sweep voltammetry method and continuous transient current-time response method. The performance of photocatalytic CO₂ reduction on TiO₂ loaded with different noble metals are discussed. The results show that loading noble metal on TiO₂ can significantly accelerate the separation of photo production electron and hole and reduce the recombination rate. Furthermore, the sequence of cocatalysts selective reduction for CO₂ is Ag>Au>Pd>Pt. A negative correlation between the selectivity of CO₂ hydrogenation and hydrogen production has been discovered. The cocatalyst which has advantage to hydrogen evolution process goes against the selectivity of CO₂hydrogenation.
- cocatalyst,
- TiO₂,
- photocatalysis,
- CO₂ reduction

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