Summary: | Manganese ferrite (MnFe<sub>2</sub>O<sub>4</sub>) and calcium-doped manganese ferrite (Ca-MnFe<sub>2</sub>O<sub>4</sub>) were synthesized, characterized, and tested for oxidation of hydrocarbons (CH) in a self-designed gas blow rotating (GBR) reactor. The uniformly sized and thermally stable MnFe<sub>2</sub>O<sub>4 </sub>nanoparticles (molar ratio, 1/284.5) showed a reasonable catalytic activity (productivity: 366.17 mmolg<sup>−1</sup>h<sup>−1</sup>) with 60% selectivity at 80 °C, which was further enhanced by calcium doping (productivity: 379.38 mmolg<sup>−1</sup>h<sup>−1</sup>). The suspicious behavior of Ca-MnFe<sub>2</sub>O<sub>4</sub> was disclosed experimentally and theoretically as well.
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