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In this work, using folic acid as a carbon/nitrogen precursor and Zn(NO3)2·6H2O as the template, largely nitrogenated (12.4%) and highly porous carbon material has been produced by a synchronous template carbonization and nitridation approach. More importantly, two effective redox additives of magneson Ι (MI) and alizarin yellow R (AYR) have been implemented in KOH electrolyte, and, at the electrode-electrolyte...
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