Selenium vacancy-rich and heteroatom-doped CoSe/Mo2CTx MXene prepared using ionic liquid dopants for pH-universal hydrogen evolution and flexible supercapacitors

Heteroatom-doped CoSe on Mo2CTx MXene is developed by using an ionic liquid. Se vacancy pairs and N, B, and F heteroatom introduce active sites, improving the electrochemical activity in hydrogen evolution reaction and supercapacitors.