sentence: Oxygen passes over one electrode and hydrogen over the other, generating electricity water and heat.
sentences_before: A fuel cell consists of two electrodes sandwiched around an electrolyte.
sentences_after: Layers of materials with distinct electrochemical properties are sandwiched together to form a single galvanic cell. At the heart lies a membrane that can only be crossed by charged molecules. Gas-permeable electrodes coated with a catalyst adhere to this membrane, adding a layer on either side. There electrodes are in turn connected to a device that can utilize electricity. Hydrogen gas flows into channels on one face of the cell and migrates through that electrode, while the same occurs with oxygen gas along the opposite electrode.
concept_name: oxygen
headings: Hydrogen car The principles of Hydrogen Car What is the Principle?
categories: Vehicles