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Nitrogen doping of the carbon is an important method to improve theperformance and durability of catalysts for proton exchange membrane fuel cellsby platinum-nitrogen and carbon-nitrogen bonds. This study shows that p-phenylgroups and graphitic N acting bridges linking platinum and the graphene/carbonblack (the ratio graphene/carbon black=2/3) hybrid support materials achievedthe average size of platinum nanoparticles with (4.88 +/- 1.79) nm. It improvedthe performance of the lower-temperature hydrogen fuel cell up to 0.934 W cm-2at 0.60 V, which is 1.55 times greater than that of commercial Pt/C. Dopingalso enhanced the interaction between Pt and the support materials, and theresistance to corrosion, thus improving the durability of the low-temperaturehydrogen fuel cell with a much lower decay of 10 mV at 0.80 A cm-2 after 30kcycles of an in-situ accelerated stress test of catalyst degradation than thatof 92 mV in Pt/C, which achieves the target of Department of Energy (<30 mV).Meanwhile, Pt/NrEGO2-CB3 remains 78% of initial power density at 1.5 A cm-2after 5k cycles of in-situ accelerated stress test of carbon corrosion, whichis more stable than the power density of commercial Pt/C, keeping only 54%after accelerated stress test.

journal of energy chemistry

Doped graphene/carbon black hybrid catalyst giving enhanced oxygen  reduction reaction activity with high resistance to corrosion in proton  exchange membrane fuel cells