图6. (a)纳米棒状、类丝状、管状α-MnO₂和花状球形Mn₂O₃的SEM照片; (b)在甲苯浓度为10^-3、甲苯/O₂的摩尔比为1/400和空速为20000 mL/(g?h)的条件下甲苯的转化率随反应温度的变化曲线^[51]

Fig. 6. (a) SEM images of rod-like α-MnO₂, wire-like α-MnO₂, tube-like α-MnO₂, and flower-like Mn₂O₃; (b) Toluene conversion as a function of reaction temperature over the catalysts under the conditions of a toluene concentration of 10^-3, toluene/ O₂ = 1/400 (mol/mol), and a space velocity of 20000 mL/(g?h)^[51]