Chemical synthesis of nickel nanoparticles embedded in graphitic carbon nitride as HER electrocatalyst for water splitting systems - Delfino, Gustavo Moreira; Mehmood, Rashid; Rêgo, Galtiere Corrêa; Rosa, Washington Santa; Gonçalves, Renato Vitalino; Moreto, Jéferson Aparecido; Pinto, Haroldo Cavalcanti (Brazil MRS Meeting, 2024)