【摘要】 在氮气氛围中热处理含氯化锰、六次甲基四胺和乙炔黑的前驱体制备非贵金属氧还原反应催化剂MnHMTA/C.考察了热处理温度和保护气流动对催化剂活性的影响.在700℃下热处理2 h所得催化剂具有良好的催化活性.在热处理过程中,Mn(II)离子转变为MnO,改进了催化剂活性.六次甲基四胺以其气体分解产物参与催化剂活性位的生成,保护气的流动会将气体分解产物带出,从而减弱MnHMTA/C催化剂的性能.更多还原

【Abstract】 A non-precious metal catalyst MnHMTA/C to oxygen reduction reaction was prepared by pyrolyzing a precursor from manganese chloride,hexamethylenetetramine and acetylene black in nitrogen gas atmosphere.The effect of heat treatment temperature and flowing of nitrogen 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 catalyst as its decomposed gases.The flowing 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.更多还原