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在演示二氧化锰催化过氧化氢分解制氧气时,实验现象是看到不断翻腾的黑色悬浮液。这种现象给学生观察二氧化锰在其中的作用带来一定难度。同时,在传统演示实验中,为比对反应前后二氧化锰的质量变化,须经过滤分离,其操作繁琐、耽误时间。经热分解多孔性砖粒负载的高锰酸钾,再经水溶解除去高锰酸钾分解的可溶性产物,制成负载型二氧化锰催化剂。以此为催化剂,演示二氧化锰催化过氧化氢分解制氧气实验,取得了满意的效果,有效地解决了上述困难。
When demonstrating that manganese dioxide catalyzes the decomposition of hydrogen peroxide to produce oxygen, the experimental phenomenon is to see a constantly churning black suspension. This phenomenon gives students a certain degree of difficulty in observing the role of manganese dioxide in them. In the meantime, in the traditional demonstration experiment, to compare the mass change of manganese dioxide before and after the reaction, it must be separated by filtration and its operation is cumbersome and time-consuming. Thermal decomposition of porous brick load of potassium permanganate, and then dissolved in water to remove soluble potassium permanganate decomposition products, made of supported manganese dioxide catalyst. Using this as a catalyst, we demonstrated that manganese dioxide catalyzes the decomposition of hydrogen peroxide to produce oxygen and achieved satisfactory results, thus effectively solving the above difficulties.