Depends on what you mean. Pure as in RAAAGH SUPER SAIYAN DIEEEE then probably not. Energy is the ability to do work, while it is probable that eventually in some distant future time that people may create ways to harness, say, lightning...or light rays so that they remain in one place and form a ball of only light or lightning or whatever...energy is mostly immaterial. You see your fingers hitting a keyboard? Eyelids closing? Use energy.

Are you talking about pure, as in it won't go away, it's used 100% efficiently? Then no, and almost definitely will never be, unless someone manages some crazy stuff in a perfect vacuum. Note, Space is not, technically.

Yes. Pure Nature - sun have pure energy generated.

I'm talking about energy which is universal, underlying all forms of energy(kinetic and potential). "Pure energy". Maybe there is no answer or I'm missing something with the definition of energy. I have heard it talked about when looking into antimatter/matter collisions

Nope, not pure. Right down at bottom level there are several quarks, leptons and Bosons - they are made from energy but the energy is in one of those packets.

Energy is energy. It may convert into various forms, but it's still energy.

What is impure about electromagnetism, photons, inertia, or even the potential of burning fossil fuel?

yeah wind, water, sun... wind turbine, water turbines, solar cells

What G said :)

no