Principle

The PEM electrolyser consists of a thin, proton-conducting
polymer electrolyte membrane (PEM), the two sides of which are each
coated with a catalysing material. These coatings form the anode
and the cathode. The theoretical decomposition voltage of water is
1.23 V. This voltage is higher in practice, however, because of
losses in the electrolyser. It is about 1.55 V in the electrolyser
used here. When this voltage is exceeded, water molecules are
decomposed and hydrogen and oxygen are generated.

Benefits


Experiment is part of a complete solution set with a total of 10 experiments for Renewable Energy fuel-cell technology

The power supply used is versatile and is particularly suitable for pupil tests for all ages

Doubled learning success: Electric circuit diagram on top, real components can be seen at the bottom



Tasks

How can hydrogen be generated from water?

Observe what happens when a voltage is applied to the PEM
electrolyser.