Method for preparing high-activity nano silver oxide hydrogen evolution material through ultrafast laser ablation in pure water

The invention discloses a method for preparing a high-activity nano silver oxide hydrogen evolution material by ultrafast laser ablation in pure water, which comprises the following steps: ablating a silver ring by ultrafast femtosecond laser, suspending the silver ring on the surface of water to be in full contact with air, ablating the surface of the silver ring by the ultrafast femtosecond laser in a light beam focusing manner, silver atoms are evaporated from the surface of the silver ring under the action of the ultrafast femtosecond laser to form nano silver oxide particles; the temperature, pressure, additives and the like in water are controlled, a high-density stacking staggered structure is introduced while the nano silver oxide particles are formed, the coordination number, the tensile strain and the adsorption energy are optimized, and the inactive nano silver oxide particles are converted into the high-activity nano silver oxide hydrogen evolution material. The ultrafast laser ablation technology