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Issue 19, 2018
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Iron oxide decorated N-doped carbon derived from poly(ferrocene-urethane) interconnects for the oxygen reduction reaction

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Abstract

We report the synthesis of mixed iron oxide particles decorated on nitrogen-doped carbon by forming covalent polyurethane linkages between ferrocene and phloroglucinol. Contrasting the electrostatic interactions and the physical cross-linking of the Fe/N/C precursors, here poly(ferrocene-urethane) (PFU) was acquired exclusively by (i) conversion of dicarboxylic acids present in ferrocene to azide linkages; and (ii) chemically linking the ferrocene-diazides to phloroglucinol through urethane bonds. The as obtained poly(ferrocene-urethane) was pyrolyzed under argon at elevated temperatures (600, 800 and 1000 °C) to yield iron oxide decorated N-doped carbon interconnects. The resultant porous materials were found to have the right balance of hierarchical porosity (micro-, meso- and macro-), and N-doping and iron oxide phases in and on the carbon matrices, respectively. Among the PFU samples pyrolyzed at different temperatures, the sample pyrolyzed at 800 °C displayed a more positive onset potential, a higher current density, and direct four electron transfer kinetics with a lesser yield of H2O2 (5.6%) on par with the commercially available Pt catalysts for the oxygen reduction reaction (ORR) in alkaline KOH solution. The superior electrocatalytic activity of PFU-800 can be traced to the synergistic effect between the iron oxide on and N-doping of the porous carbon nanostructures and the balanced hierarchial porosity. The developed non-Pt based electrocatalyst can be considered as a promising electrocatalyst in alkaline fuel cell applications.

Graphical abstract: Iron oxide decorated N-doped carbon derived from poly(ferrocene-urethane) interconnects for the oxygen reduction reaction

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Publication details

The article was received on 22 May 2018, accepted on 29 Jul 2018 and first published on 30 Jul 2018


Article type: Paper
DOI: 10.1039/C8NJ02529K
Citation: New J. Chem., 2018,42, 15629-15638
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    Iron oxide decorated N-doped carbon derived from poly(ferrocene-urethane) interconnects for the oxygen reduction reaction

    V. Premkumar, N. Chandrasekaran, K. Madasamy, M. Kathiresan, P. Kanagavalli and S. Senthil Kumar, New J. Chem., 2018, 42, 15629
    DOI: 10.1039/C8NJ02529K

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