Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/3267
Title: Morphological Ensembles of N-Doped Porous Carbon Derived from ZIF-8/Fe-Graphene Nanocomposites: Processing and Electrocatalytic Studies
Authors: Minju, T
Rajith, I
Sreekumar, K
Nair, B N
Mohamed, A P
Anilkumar, G M
Yamaguchi, T
Hareesh, U S
Keywords: Electrocatalyst
Fuel Cell
N- Fe co-doped carbon
Oxygen Reduction Reaction
Issue Date: 14-Aug-2018
Publisher: Wiley
Citation: ChemistrySelect, 3(30):8688-8697
Abstract: Engineering the active site density of porous carbon catalysts for enhanced electrocatalytic activity is the current focus in the quest for economically viable fuel cells. Herein, we synthesise ZIF-8/Fe-graphene composites for the formation of N and Fe co-doped carbon with diverse morphologies ranging from tubes and sheets to frameworks of carbon. A synthetic strategy involving the one pot synthesis of ZIF-8 based composites is accomplished by the reaction of 2-methylimidazole with mixed Zn/Fe salt solution containing graphene dispersions. The high temperature heat treatment of this precursor mix yielded micro-meso porous architectures of N, Fe co-doped carbon with dispersions of Fe/Fe3C. An onset potential value of 0.95 V and a half-wave potential of 0.82 V coupled with excellent durability and stability in alkaline medium indicated improved electrocatalytic performances over its commercial Pt/C counterpart. The appreciable electrocatalytic properties of the synthesized carbon are attributed to its morphological diversity, hybrid structure, high N doping and its heteroporous characteristics. The dispersed Fe/Fe3C and FeNx sites facilitated enhanced oxygen adsorption and the graphene inclusions in the composite provided retention of high nitrogen contents.
Appears in Collections:2018

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