Preparation of Mn-Doped Co3O4 Catalysts by an Eco-Friendly Solid-State Method for Catalytic Combustion of Low-Concentration Methane

Coalbed methane is a significant source of in the atmosphere, which potent greenhouse gas with considerable contribution to global warming, thus it great importance remove coalbed before emission. Exploring economical non-noble metal catalysts for catalytic combustion (CMC) has been wide concern mitigate effect caused by emitted low-concentration methane. Herein, series Mn-doped Co3O4 have synthesized environmentally friendly solid-state method. As result, Mn0.05Co1 catalyst performed best CMC activity (T90 = 370 °C) and good moisture tolerance (3 vol% steam). The introduction an appropriate amount manganese conduced lattice distortion transformed Co3+ Co2+, producing more active oxygen vacancies. exhibited better reducibility mobility. In situ studies revealed that was adsorbed oxidized much easier on Mn0.05Co1, crucial reason its superior performance.