UK Firm ITM Power has developed a way of making hydrogen at home to fuel a car.
Chief executive Jim Heathcoate says it has made a new type of plastic for the production process.
ITM believes the plastic could be mass produced relatively cheaply and would allow people to create the gas at home using their normal electric supply or greener sources such as solar power.
However, some industry experts have said that electric power and not hydrogen could be more cost effective and energy efficient.
They have also questioned how safe it is to create fuel at home.