(see note 3 below, no) In short you are asking, "Why can’t things just run forever?" There are "laws" in the study of physics that describe how energy operates in our physical world. Quantum physics gives us lots of exceptions but in the physical world there is a law of conservation of energy.1 It says that energy in any system is "conserved." It doesn’t grow or diminish. The problem for most of us is to understand the extent of the system we are looking at. A hydroelectric plant produces energy in a seemingly endless fashion from falling water. What we may not immediately notice is the evaporation driven by the sun and the rainfall that replaces the water.2

There is a process that uses a piezoelectric effect to vibrate water into its components.3 In fact there are over 350 different ways to separate hydrogen from other compounds.4 What they all have in common is that they require an energy input that will raise hydrogen from a stable form to an unstable one and increase its potential energy. Piezoelectrics use electrical energy to vibrate often ceramic materials. Microphones, small buzzers, vaporizers and even an interesting form of refrigeration may use piezoelectric effects. All these things have in common is the electrical input of energy.

"Nano" often refers to very small engineered constructions.5 In this case the constructions have unique properties. They do not "have their own energy" nor do they allow us to defeat the law of conservation of energy. Nano technology may improve efficiency. IC vehicles are about 15% eefficient when tire hits the road. Fuel cell vehicles may improve this to 30% while some battery electric vehicles are presently over 90% efficient and much cheaper to produce and operate.