Catalysts Based on Strontium Titanate Doped with Ni/Co/Cu for Dry Reforming of Methane

Adrian Mizera; Andrzej Kowalczyk; Lucjan Chmielarz; Ewa Drożdż

doi:10.3390/ma14237227

Catalysts Based on Strontium Titanate Doped with Ni/Co/Cu for Dry Reforming of Methane

Materials (Basel). 2021 Nov 26;14(23):7227. doi: 10.3390/ma14237227.

Authors

Adrian Mizera¹, Andrzej Kowalczyk², Lucjan Chmielarz², Ewa Drożdż¹

Affiliations

¹ Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, Poland.
² Faculty of Chemistry, Jagiellonian University, 31-007 Kraków, Poland.

Abstract

Two series of strontium titanates doped with Ni, Co, or Cu with general formula of SrTi_1-xMe_xO₃ for Sr-stoichiometric and Sr_0.95Ti_1-xMe_xO₃ for Sr-non-stoichiometric materials (where Me = Ni, Co or Cu and x were 0.02 and 0.06) were obtained by the wet chemical method. The samples were calcinated at 900, 950, and 1050 °C and characterized in terms of their structural properties (XRD), the possibility of undergoing the reduction and oxidation reactions (TPR/TPOx), and catalytic properties. All obtained materials were multiphase and although the XRD analysis does not confirm the presence of Ni, Co, and Cu oxides (with one exception for Cu-doped sample), the TPR/TPOx profiles show reduction peaks that can be attributed to the reduction of these oxides which may at first appear in an amorphous form. Catalytic tests in dry reforming of methane reaction showed that the highest catalytic activity was achieved for Ni-doped materials (up to 90% of CH₄ conversion) while Co and Cu-doped samples showed only a very slight catalytic effect. Additionally, the decrease in methane conversion with an increasing calcination temperature was observed for Ni-doped strontium titanates.

Keywords: SrTiO3; dry reforming of methane; nickel catalyst.