How does the fuel cell version of a hydrogen vehicle propel?

The fuel cell version of a hydrogen vehicle propels by a process in which hydrogen reacts with oxygen to produce electricity. This electricity is used to power an electric motor, which then drives the vehicle. In a fuel cell, hydrogen is split into protons and electrons. The protons move through the fuel cell membrane, while the electrons are directed through an external circuit, creating an electric current that powers the electric motor. The only byproduct of this reaction is water, making it a clean energy source.

This method of propulsion is distinct from other options because it does not rely on combustion. Instead, it uses electrochemical reactions to convert the chemical potential of hydrogen directly into electrical energy, thereby driving the motor. This process is efficient and provides the benefits of lower emissions compared to traditional combustion engines.