Nitrogen doping of the carbon is an important method to improve the performance and durability of cat-alysts for proton exchange membrane fuel cells by platinum-nitrogen and carbon-nitrogen bonds.This study shows thatp-phenyl groups and graphitic N acting bridges linking platinum and the graphene/car-bon black(the ratio graphene/carbon black=2/3)hybrid support materials achieved the average size of platinum nanoparticles with(4.88±1.79)nm.It improved the performance of the lower-temperature hydrogen fuel cell up to 0.934 W cm-2 at 0.60 V,which is 1.55 times greater than that of commercial Pt/C.Doping also enhanced the interaction between Pt and the support materials,and the resistance to corrosion,thus improving the durability of the low-temperature hydrogen fuel cell with a much lower decay of 10 mV at 0.80 A cm 2 after 30 k cycles of an in-situ accelerated stress test of catalyst degrada-tion than that of 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-2 after 5 k cycles of in-situ accelerated stress test of carbon corrosion,which is more stable than the power density of commercial Pt/C,keeping only 54％after accelerated stress test.

Zhaoqi Ji;Jianuo Chen;María Pérez-Page;Zunmin Guo;Ziyu Zhao;Rongsheng Cai;Maxwell T.P.Rigby;Sarah J.Haigh;Stuart M.Holmes

School of Automotive Engineering,Harbin Institute of Technology,Weihai,264209,Shandong,China;Department of Chemical Engineering and Analytical Science,The University of Manchester,Manchester M13 9PL,UK;Department of Materials,The University of Manchester,Manchester M13 9PL,UK

能源化学

[1]Zhaoqi Ji;Jianuo Chen;María Pérez-Page;Zunmin Guo;Ziyu Zhao;Rongsheng Cai;Maxwell T.P.Rigby;Sarah J.Haigh;Stuart M.Holmes-.Doped graphene/carbon black hybrid catalyst giving enhanced oxygen reduction reaction activity with high resistance to corrosion in proton exchange membrane fuel cells)[J].能源化学,2022(05):143-153

thatp,NrEGO2,CB3

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