SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 39 ›› Issue (11): 135-143.DOI: 10.1016/j.cjche.2020.09.029

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

The size effect and high activity of nanosized platinum supported catalysts for low temperature oxidation of volatile organic compounds

Ziqing Yuan, Ziyu Chen, Jianxin Mao, Renxian Zhou   

  1. Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
  • Received:2020-05-31 Revised:2020-09-09 Online:2021-12-27 Published:2021-11-28
  • Contact: Jianxin Mao
  • Supported by:
    The financial support from the National Key Research and Development Program of China (2016YFC0204300) is gratefully acknowledged.

The size effect and high activity of nanosized platinum supported catalysts for low temperature oxidation of volatile organic compounds

Ziqing Yuan, Ziyu Chen, Jianxin Mao, Renxian Zhou   

  1. Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
  • 通讯作者: Jianxin Mao
  • 基金资助:
    The financial support from the National Key Research and Development Program of China (2016YFC0204300) is gratefully acknowledged.

Abstract: Pt/Al2O3 catalysts with smaller size of Pt nanoparticles were prepared by ethylene glycol reduction method in two different way and their oxidation activities for three typical VOCs (volatile organic compounds) were evaluated. The catalyst prepared by first adsorption and then reduction procedure is denoted as L-Pt/Al2O3 while the catalyst prepared by first reduction and then loading procedure is defined as R-Pt/Al2O3. The results show that L-Pt/Al2O3 with the stronger interaction between Pt species and Al2O3 exhibit smaller size of Pt nanoparticles and favorable thermal stability compared with R-Pt/Al2O3. L-Pt/Al2O3 is favor of the formation of more adsorbed oxygen species and more Pt2+ species, resulting in high catalytic activity for benzene and ethyl acetate oxidation. However, R-Pt/Al2O3 catalysts with higher proportion of Pt0/Pt2+ and bigger size of Pt particles exhibits higher catalytic activity for n-hexane oxidation. Pt particles in R-Pt/Al2O3 were aggregated much more serious than that in L-Pt/Al2O3 at the same calcination temperature. The Pt particles supported on Al2O3 with~10 nm show the best catalytic activity for n-hexane oxidation.

Key words: Environment, Particle size distribution, Catalysis, Thermal stability, Size effect of Pt

摘要: Pt/Al2O3 catalysts with smaller size of Pt nanoparticles were prepared by ethylene glycol reduction method in two different way and their oxidation activities for three typical VOCs (volatile organic compounds) were evaluated. The catalyst prepared by first adsorption and then reduction procedure is denoted as L-Pt/Al2O3 while the catalyst prepared by first reduction and then loading procedure is defined as R-Pt/Al2O3. The results show that L-Pt/Al2O3 with the stronger interaction between Pt species and Al2O3 exhibit smaller size of Pt nanoparticles and favorable thermal stability compared with R-Pt/Al2O3. L-Pt/Al2O3 is favor of the formation of more adsorbed oxygen species and more Pt2+ species, resulting in high catalytic activity for benzene and ethyl acetate oxidation. However, R-Pt/Al2O3 catalysts with higher proportion of Pt0/Pt2+ and bigger size of Pt particles exhibits higher catalytic activity for n-hexane oxidation. Pt particles in R-Pt/Al2O3 were aggregated much more serious than that in L-Pt/Al2O3 at the same calcination temperature. The Pt particles supported on Al2O3 with~10 nm show the best catalytic activity for n-hexane oxidation.

关键词: Environment, Particle size distribution, Catalysis, Thermal stability, Size effect of Pt