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Lookup NU author(s): Professor Peter Cumpson
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Developing low cost oxygen reduction catalysts that perform with high efficiency is highly desirable for thecommercial success of environmentally friendly energy conversion devices such as fuel cells and metal–airbatteries. In this work a three-dimensional, 3D, self-assembled Mn3O4 hierarchical network has been grownon nitrogen doped reduced graphene oxide (NrGO), by a facile and controllable electrodeposition processand its electrocatalytic performance for oxygen reduction reaction (ORR) has been assessed. The directlyelectrodeposited MnOx on a glassy carbon electrode (GCE) exhibits little electrocatalytic activity,whereas the integrated Mn3O4/NrGO catalyst is more ORR active than the NrGO. The resulting electrodearchitecture exhibits an “apparent” four-electron oxygen reduction pathway involving a dual sitereduction mechanism due to the synergetic effect between Mn3O4 and NrGO. The 3D Mn3O4/NrGOhierarchical architecture exhibits improved durability and methanol tolerance, far exceeding thecommercial Pt/C. The enhanced ORR performance of the room temperature electrodeposited Mn3O4nanoflake network integrated with NrGO reported here offers a new pathway for designing advancedcatalysts for energy conversion and storage.
Author(s): Bikkarolla SK, Yu F, Zhou W, Joseph P, Cumpson P, Papakonstantinou P
Publication type: Article
Publication status: Published
Journal: Journal of Materials Chemistry A
Print publication date: 01/07/2014
ISSN (print): 2050-7488
ISSN (electronic): 2050-7496
Publisher: Royal Society of Chemistry
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