Jump to main content
Jump to site search


Facile synthesis of three-dimensional ordered macroporous Sr1-xKxTiO3 perovskites with enhanced catalytic activity for soot combustion

Abstract

Three-dimensionally ordered macroporous (3DOM) perovskite catalysts possessing sufficient contact points are conducive to polishing catalytic combustion of soot. In this work, 3DOM Sr1-xKxTiO3 (x=0, 0.1, 0.2, 0.3) perovskite-type catalysts were prepared through colloidal crystal templating method. The as-prepared samples were analyzed by FESEM, TEM, XRD, FT-IR N2 adsorption-desorption, H2-TPR, XPS, O2-TPD and XRF techniques as well as simulated soot combustion reaction afterwards, to investigate the morphologies, physicochemical properties and catalytic activity performance. Titanium sol can convert to TiO2 at a relatively low temperature and stabilize the 3DOM structure, which is beneficial to restraining the destruction of 3DOM skeleton after potassium is introduced. On one hand, the presence of potassium can form more oxygen vacancies, which may facilitate the generation of active oxygen species and accelerate the soot combustion. On the other hand, eutectic compounds come into existence, promoting the contact between soot and catalyst. Nevertheless, too much potassium will to some extent destroy the macroporous skeleton. Comprehensively considering intrinsic properties and structural integrity, 3DOM Sr0.8K0.2TiO3 perovskite catalyst performs the best catalytic activity for soot combustion with T50 at 382 oC.

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Jul 2018, accepted on 14 Sep 2018 and first published on 14 Sep 2018


Article type: Paper
DOI: 10.1039/C8CY01498A
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
  •   Request permissions

    Facile synthesis of three-dimensional ordered macroporous Sr1-xKxTiO3 perovskites with enhanced catalytic activity for soot combustion

    P. Zhao, N. Feng, F. Fang, G. Liu, L. Chen, J. Meng, C. Chen, L. Wang, H. Wan and G. Guan, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8CY01498A

Search articles by author

Spotlight

Advertisements