Phosphorus-nitrogen dual doped carbon as an effective catalyst for oxygen reduction reaction in acidic media: effects of the amount of P-doping on the physical and electrochemical properties of carbon
N-doped carbon prepared by pyrolysis of dicyandiamide with various MeCl2 center dot xH(2)O (Me = Co, Fe, and Ni) composites: Effect of type and amount of metal seed on oxygen reduction reactions