Identification of active sites for oxygen reduction reaction on nitrogen- and sulfur-codoped carbon catalystsVillemson, Karl Markus; Kaare, Kätlin; Raudsepp, Ragle; Käämbre, Tanel; Šmits, Krišjānis; Wang, Pangpang; Kuzmin, Anton V.; Šutka, Andris; Shainyan, Bagrat A.; Kruusenberg, IvarJournal of physical chemistry C2019 / p. 16065-16074 https://doi.org/10.1021/acs.jpcc.9b00117