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Preparation of metal oxide/polyaniline/N-MWCNT hybrid composite electrodes for electrocatalytic synthesis of ammonia at atmospheric pressure

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Abstract

We report the synthesis and characterization of metal oxide/polyaniline/N-doped-multi-walled carbon nanotube (N-MWCNT) hybrid composite electrocatalysts (i.e., Fe3O4/PANI/N-MWCNT and RuO2/PANI/N-MWCNT) and their subsequent testing in electrocatalytic synthesis of ammonia from water and nitrogen at low temperatures (≤60 °C) and atmospheric pressure. For the purpose of this test, Nafion-based membrane electrode assemblies (MEA) with a Pt/C anode and different hybrid composite material (HCM) cathodes were fabricated. The maximum obtained rate of ammonia synthesis was 4.1 × 10−12 mol s−1 cm−2 at 60 °C at an applied voltage of 2.0 V, and the maximum faradaic efficiency of 0.49% was achieved at 25 °C and 1.2 V when RuO2/PANI/N-MWCNT was employed as the cathode. This HCM approach could therefore provide a novel insight into the design of different electrocatalysts for the nitrogen reduction reaction with a high faradic efficiency.

Graphical abstract: Preparation of metal oxide/polyaniline/N-MWCNT hybrid composite electrodes for electrocatalytic synthesis of ammonia at atmospheric pressure

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Publication details

The article was received on 23 Sep 2018, accepted on 02 Nov 2018 and first published on 03 Nov 2018


Article type: Paper
DOI: 10.1039/C8SE00470F
Citation: Sustainable Energy Fuels, 2019, Advance Article
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    Preparation of metal oxide/polyaniline/N-MWCNT hybrid composite electrodes for electrocatalytic synthesis of ammonia at atmospheric pressure

    C. H. Jung, C. Yoo, J. Kim, E. Jeong, J. H. Park, H. C. Choi, M. Han and H. C. Yoon, Sustainable Energy Fuels, 2019, Advance Article , DOI: 10.1039/C8SE00470F

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