This demonstration brings the simplest multidisciplinary approach to evaluate the impact of the electrocatalysts in the water electrolysis half-reactions. The experiment is implemented with damaged hard drive (HD) platters as dimensionally stable electrodes for hydrogen and oxygen evolution reactions. The CoPtCr and Ni–P alloys deposited on the top of the platter are electrochemically stable in alkaline electrolyte and have an excellent catalytic activity. Techniques and principles, such as linear sweep voltammetry, chronopotentiometry, activation overpotential, and voltage efficiency, are demonstrated by employing these platters as electrodes.

中文翻译：

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重复使用硬盘盘来演示用于氢和氧释放反应的电催化剂

该演示带来了最简单的多学科方法来评估电催化剂在水电解半反应中的影响。该实验使用损坏的硬盘（HD）盘片作为尺寸稳定的电极进行，以进行氢气和氧气释放反应。沉积在镀层顶部的CoPtCr和Ni-P合金在碱性电解液中具有电化学稳定性，并具有出色的催化活性。通过将这些盘片用作电极，可以证明诸如线性扫描伏安法，计时电位法，活化超电势和电压效率之类的技术和原理。