Radioactive materials are a chemical in which the atom's nucleus is unstable. They maintain their stability by adjusting the seat (spontaneous fission, emission of alpha particles, or converting neutrons to protons or the reverse). It is known as radioactive decay or transformation, and it frequently accompanies the emission of ionizing radiation (beta particles, neutrons, or gamma rays).
No, electricity isn't a radioactive substance. However, you can use electricity to make radiation if you want to. Making an electron emitter and an accelerator is one approach to doing it. CRT monitors employ this type of display. To do so, you'll need to generate voltages of 10,000 V.
The effects of radiation cannot be "neutralized." Before radioactive waste from nuclear power plants stops radiating, you must store it for millennia. However, transmutation might neutralize it, making it, at least in theory, non-hazardous to a large extent. In this process, vacuum pumps are crucial.