Preparation of Nitrogen-Doped Carbon Catalyst to Oxygen Reduction Reaction and Influence of Protective Gas Flowing on Its Activity

A non-precious metal catalyst MnHMTA/C to oxygen reduction reaction was prepared by py-rolyzing a precursor from manganese chloride, hexamethylenetetramine and acetylene black in nitrogen gas atmosphere. The effect of heat treatment temperature and owing of nitro-gen gas were investigated. A catalyst with the highest activity can be obtained at 700 ℃. Mn(II) ion was changed to MnO in heat treatment, which improved the catalytic activity of the catalyst. Hexamethylenetetramine takes part in the formation of active site of the cata-lyst as its decomposed gases. The owing of protective gas takes the decomposed gases out of the tube furnace and brings negative effect on the catalytic activity of the MnHMTA/C catalyst.