SnO2-based solid solutions for CH4 deep oxidation: Quantifying the lattice capacity of SnO2 using an X-ray diffraction extrapolation method

With an XRD extrapolation method, 21% Sn4+ in the SnO2 lattice can be maximally replaced by Mn3+ to form a stable solid solution. Catalysts consisting of Sn-Mn solid solution without extra Mn2O3 display higher CH4 oxidation activity.