High-efficient catalysts of core-shell structured Pt@transition metal oxides (TMOs) supported on 3DOM-Al2O3 for soot oxidation: The effect of strong Pt-TMO interaction

•3DOM Al2O3-supported Pt@TMO core-shell NP catalysts were synthesized by GBMR/P method.•Strong Pt-TMO interaction can induce the formation of active sites for soot oxidation.•Catalytic activity for soot oxidation strongly depends on the strong Pt-TMO interaction.•The catalytic NO oxidation to NO2 is the rate-determining factor for soot oxidation.•The characterizations and DFT calculations have an insight into the catalytic mechanism.