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A three-dimensional Mn3O4 network supported on a nitrogenated graphene electrocatalyst for efficient oxygen reduction reaction in alkaline media

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.

Publication metadata

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

Year: 2014

Volume: 2

Pages: 14493-14501

Print publication date: 01/07/2014

ISSN (print): 2050-7488

ISSN (electronic): 2050-7496

Publisher: Royal Society of Chemistry


DOI: 10.1039/c4ta02279c


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