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关于催化剂的演示实验，现在中学化学教材中普遍是以二氧化锰做催化剂进行演示的。例如氯酸钾分解制氧气是用二氧化锰做催化剂；过氧化氢在二氧化锰的催化下，能很快放出氧气。这两个实验都表现出了催化剂对化学反应速度的影响，但是在实验中我们很难看到催化剂在反应过程中的
With regard to the catalyst demonstration experiment, the manganese dioxide catalyst is generally used as a catalyst in middle school chemistry textbooks. For example, the decomposition of potassium chlorate to oxygen is performed using manganese dioxide as a catalyst; hydrogen peroxide quickly releases oxygen under the catalysis of manganese dioxide. Both of these experiments showed the influence of the catalyst on the reaction rate of the chemical reaction, but it was difficult to see the catalyst during the reaction in the experiment.