The problem is thermodynamics get in the way here. You have to put energy in to split the hydrogen out. Hydrogen is incredibly difficult to work with. Its highly explosive, difficult to compress and bottle and leaks out of anything your store it in. Hydrogen isn't a fuel source, you can use it as a carrier of energy but you get SIGNIFICANT losses in the process.
Free hydrogen would be a very valuable resource but its not available on our planet because of our oxygen rich atmosphere. Oddly enough in the outer solar system worlds like Titan which in many ways is probably similar to Earth 4 billion years ago have plenty of it but no free Oxygen. On Titan the hydro-logical cycle is based on liquid hydrocarbons like Methane because its so cold and water ice is like silicate rocks in the inner solar system.
The problem is thermodynamics get in the way here. You have to put energy in to split the hydrogen out. Hydrogen is incredibly difficult to work with. Its highly explosive, difficult to compress and bottle and leaks out of anything your store it in. Hydrogen isn't a fuel source, you can use it as a carrier of energy but you get SIGNIFICANT losses in the process.
Free hydrogen would be a very valuable resource but its not available on our planet because of our oxygen rich atmosphere. Oddly enough in the outer solar system worlds like Titan which in many ways is probably similar to Earth 4 billion years ago have plenty of it but no free Oxygen. On Titan the hydro-logical cycle is based on liquid hydrocarbons like Methane because its so cold and water ice is like silicate rocks in the inner solar system.