You can use the hydrogen in fuel cells for power generation for a two wheeler motorcycle.
No, body cells cannot use hydrogen on its own as a fuel. It needs to be included in a carbohydrate such as sugar, protein or fats.
Fuel conversion cells are made from platinum and convert the material going through the device into heat and electric power (about equally). The element used is often hydrogen. Hydrogen comes from many places, but the practical commercially viable method in use is from stripping all other elements from natural gas. This means that the hydrogen used in most applications is a fossil fuel. This does not mean it must be this way though. Hydrogen could be obtained through the chemical stripping of water into hydrogen and oxygen. This would make fuel cells non fossil fuel based.
Fuel Cell vehicles are available in limited quantities, e.g. http://world.honda.com/FuelCell/ , but the major challenges are that the cells themselves aren't really competitive with other fuel sources yet, and places to refuel the vehicles are scarce.
They are too expensive and are hard to find.
Hydrogen fuel cells and solar photovoltaic arrays.
hydrogen
They get electricity through the use of fuel cells. not batteries. The current limiter to the length of a mission is the amount of hydrogen and oxygen carried to use in the fuel cells.
Beyond their use of hydrogen to make power there are nothing but differences between the two. Fuel cells combine oxygen and hydrogen in a porous membrane to make electricity. Hydrogen fusion takes two hydrogen atoms and fuses them into a helium atom generating heat and several particles.
There are currently no Fuel Cell vehicles being sold to the public. Only prototypes have been built.
Bio-diesel possibly or maybe we'll just have to use solar energy and Hydrogen powered fuel cells (the water produces electricity for the car)
No, fuel-cell automobiles do not use gas as a fuel. They use hydrogen gas as a fuel source, which is converted into electricity to power the vehicle.