Appendix A. Supplementary data
The following is Supplementary data to this article:
Catalyst preparation; Catalyst characterization; XRD patterns of the
as-prepared γ-MnOOH; N2 adsorption and desorption
isotherms of the different MnOx catalysts; Top plane
view and the oxygen vacancy sites of the preferentially exposed crystal
plane for various MnOx during DFT calculation; FT-IR spectra of
MnO2-H-200 and partially deactivate
MnO2-H-200 catalysts.