Preparation of metal oxide/polyaniline/N-MWCNT hybrid composite electrodes for electrocatalytic synthesis of ammonia at atmospheric pressure. Issue 2 (9th November 2018)

• Record Type: Journal Article
• Authors: Jung, Chan Hee; Yoo, Chung-Yul; Kim, Jong-Nam; Jeong, Eun-Young; Park, Jong Hyun; Choi, Hyung Chan; Han, Moon-Hee; Yoon, Hyung Chul
• Is Part Of: Sustainable energy & fuels. Volume 3Issue 2(2019)
• Page Start: 431
• Page End: 438
• Publication Date: 2018-11-09
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/c8se00470f
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : Metal oxide/polyaniline/N-MWCNT hybrid composite materials were tested for electrocatalytic synthesis of ammonia from water and nitrogen at low temperatures (≤60 °C) and atmospheric pressure. Abstract : We report the synthesis and characterization of metal oxide/polyaniline/N-doped-multi-walled carbon nanotube (N-MWCNT) hybrid composite electrocatalysts ( i.e., Fe3 O4 /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.