Site speci fic nitrogen incorporation in reduced graphene oxide using imidazole as a novel reducing agent for ef ficient oxygen reduction reaction and improved supercapacitive performance - Roy, Dipayan; Sarkar, Saikat; Bhattacharjee, Kaustav; Panigrahi, Karamjyoti; Das, Bikram Kumar; Sardar, Kausik; Sarkar, Sourav; Chattopadhyay, Kalyan Kumar (Carbon, 2020)