Combing strong metal support interaction and N doping to improve the durability of 3D carbon nanosheets supported Pt catalyst

In this work, for the first time, MgFe2O4 (MFO) is used to stabilize the N-doped 3D carbon nanosheets supported platinum catalysts (Pt/MFO/NPC). The spherical MFO nanoparticles are randomly dispersed on the surface of the 3D carbon nanosheets, with Pt particles uniformly distributed on them. The Pt/MFO/NPC catalyst possesses excellent stability and methanol tolerance in alkaline solution. The current retention reaches 87.0% after 20,000 s of stability test, which is significantly higher than that of commercial Pt/C (46.9%). In addition, the onset potential (E-onset) and half-wave potential (E-1/2) values of Pt/MFO/NPC are larger than that of the commercial contrast, implying the improved kinetics of the Oxygen reduction reaction (ORR). The excellent catalytic activity and stability of Pt/MFO/NPC can be attributed to the combined effect of N-doping and strong metal-support interaction (SMSI) between MFO and Pt. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.