一、燃料电池原理演示 1 .实验的意义当前 ,燃料电池已实际应用于宇宙飞船和空间站 ,科学工作者正在研究开发其民用 (如用于汽车等 )价值。中学教材中也已有关于燃料电池的简单介绍 ,但由于缺少实验 ,往往难以引起学生足够的学习兴趣。本实验以 0 .5ｍｏｌ·Ｌ-1的ＫＮＯ3 溶液 I. The demonstration of fuel cell principle 1. The significance of the experiment At present, fuel cells have been actually used in spacecraft and space stations, and scientists are researching and developing their values ​​for civilian use (such as for automobiles). There is already a brief introduction to fuel cells in the textbooks for secondary schools, but due to the lack of experiments, it is often difficult to arouse students’ interest in learning. In this experiment, KNO3 solution with 0.5 mol·L-1 was used.