Abstract
Ag/graphitic carbon nitride (Ag/g-C3N4) catalysts with high loading Ag are prepared using g-C3N4 by protonation. Ag+ can combine with Cl− on the surface of g-C3N4 nanosheet by protonation and further deoxidize by sodium citrate. It contributes to well disperse Ag nanoparticles on the surface of g-C3N4. In addition, Ag/g-C3N4 catalysts are also used for the oxygen reduction reaction (ORR) in alkaline solution. Compared with g-C3N4 and g-C3N4–H+Cl−, the Ag/g-C3N4 catalysts with 80wt% Ag show excellent catalytic activity for ORR. The proposed catalyst is promising, facile and low-cost, and can be a potential candidate for application in alkaline fuel cells.
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