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From Ureidopyrimidinone Containing Organic Precursor to Excavated Iron-Nitrogen Codoped Hierarchical Mesoporous Carbon (Ex-FeN-MC) as Efficient Bifunctional Electrocatalyst

Abstract

Hierarchical excavated iron-nitrogen codoped mesoporous carbon (Ex-FeN-MC) has been successfully synthesized by pyrolysis of unique ureidopyrimidinone containing organic precursor MAMIS by using silica as mesoporous template and iron nitrate as source of iron. The selected organic precursor owns multifunctionalities with diverse distribution of nitrogen and oxygen species which constitute interesting features to prepare Ex-FeN-MC electrocatalyst. The as prepared Ex-FeN-MC material shows unexpectedly higher catalytic activities towards ORR/OER performances with overpotential of 250 mV for OER in alkaline solution at a current density of 10 mA cm-2, while, ORR activity is almost similar to that of commercial Pt/C. It is believed that the excellent electrochemical performance results from the synergic contribution of hierarchical uniform mesoporous structure, evenly distributed iron nanoparticles and high density of Ex-FeN-MC catalytic active sites. The presence of hierarchical uniform mesoporous structure considerably accelerates the mass transfer and effeciently promotes the full utilization of active sites. Furthermore, it also possesses amorphous carbon in coexistence with lattice graphitic carbon which also enhanced the ORR/OER performances. Our research findings can surely constitute a new insight to design highly active ORR/OER electrocatalysts by utilizing more novel organic precursors to feature interesting characteristics to electrocatalysts, as well as opens-up a route for constructing unique multifunctional materials with mesoporous architectures for electrocatalysis and supercapacitors applications.

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Publication details

The article was received on 16 Dec 2017, accepted on 11 Feb 2018 and first published on 13 Feb 2018


Article type: Paper
DOI: 10.1039/C7NR09373J
Citation: Nanoscale, 2018, Accepted Manuscript
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    From Ureidopyrimidinone Containing Organic Precursor to Excavated Iron-Nitrogen Codoped Hierarchical Mesoporous Carbon (Ex-FeN-MC) as Efficient Bifunctional Electrocatalyst

    R. Akram, U. D. Muhammad Aizaz, S. U. Dar, A. Arshad, W. Liu, W. Zhanpeng and D. Wu, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR09373J

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