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Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion

Suppressing the nucleophilic susceptibility of ionic liquids based nanofluid is necessary for energy storage and superoxide ion (O-2(center dot-)) utilization. This study reports the development of novel pseudocapacitive Fe/Ru-SiMWCNT nanofluid comprising of Fe3O4, RuO2, SiO2, and MWCNT hybridized p...

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Main Authors: Halilu, Ahmed, Hayyan, Maan, Aroua, Mohamed Kheireddine, Yusoff, Rozita, Hizaddin, Hanee F., Basirun, Wan Jefrey
Format: Article
Published: Elsevier Science Ltd 2021
Subjects:
QD Chemistry
TP Chemical technology
Online Access:http://eprints.um.edu.my/28295/
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spelling my.um.eprints.282952022-07-29T14:51:43Z http://eprints.um.edu.my/28295/ Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion Halilu, Ahmed Hayyan, Maan Aroua, Mohamed Kheireddine Yusoff, Rozita Hizaddin, Hanee F. Basirun, Wan Jefrey QD Chemistry TP Chemical technology Suppressing the nucleophilic susceptibility of ionic liquids based nanofluid is necessary for energy storage and superoxide ion (O-2(center dot-)) utilization. This study reports the development of novel pseudocapacitive Fe/Ru-SiMWCNT nanofluid comprising of Fe3O4, RuO2, SiO2, and MWCNT hybridized phases. The Fe/Ru-SiMWCNT nanohybrid possessed CO2 and O-2 sorption capability, as confirmed from the temperature-programmed desorption experiments. Detailed spectroscopy techniques characterize the Fe/Ru-SiMWCNT nanohybrid component's physicochemical and morphological properties. The novel ionic liquid (IL) based nanofluid index is Fe/Ru-SiMWCNT/1(2-methoxyethyl)-1-methylpyrrolidinium tris(pentafluoroethyl) trifluorophosphate. Therefore, stable O-2(center dot-) was generated therein at 0.445 V vs Ag/AgCl and recorded long-term stability for 2 days with 87.31 % efficiency. Moreover, the O-2(center dot-) mediated CO2 conversion to C2O62- at 0.54 V vs Ag/AgCl with 97.90 % energy efficiency. Also, the normalized exchange current density in the nanofluid was 2.20 mA/cm(2), which is higher than 1.94 mA/cm(2) observed in the IL counterpart. The high normalized exchange current density is due to Fe/Ru-SiMWCNT nanohybrid phase's pseudocapacitance. Accordingly, this pseudocapacitive capability enables converting O-2 and CO2 in the nanofluid with lower activation overpotential of 0.305 and 0.460 V vs Ag/AgCl, respectively. In contrast, the conversion of O-2 and CO2 in the IL required higher activation overpotential of -0.826 and -1.013 V vs Ag/AgCl, respectively. The electrolysis of O-2/CO2 in the nanofluid containing diethanolamine at 1.564 V vs Ag/AgCl, 60 degrees C and 1.0 h produced methyl 2-hydroxyethyl (methyl) carbamate as the primary product. The heteronuclear multiple bond correlation spectroscopy analysis finally elucidated the carbamate structure by two strong correlations between the protons and carbons in the vicinity of three and four bonds apart. Therefore, this study highlights the control design of electrochemically stable IL-based nanofluids robust for reactive oxygen species, energy storage and conversion. Elsevier Science Ltd 2021-08 Article PeerReviewed Halilu, Ahmed and Hayyan, Maan and Aroua, Mohamed Kheireddine and Yusoff, Rozita and Hizaddin, Hanee F. and Basirun, Wan Jefrey (2021) Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion. Journal of Environmental Chemical Engineering, 9 (4). ISSN 2213-2929, DOI https://doi.org/10.1016/j.jece.2021.105285 <https://doi.org/10.1016/j.jece.2021.105285>. 10.1016/j.jece.2021.105285
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QD Chemistry
TP Chemical technology
spellingShingle QD Chemistry
TP Chemical technology
Halilu, Ahmed
Hayyan, Maan
Aroua, Mohamed Kheireddine
Yusoff, Rozita
Hizaddin, Hanee F.
Basirun, Wan Jefrey
Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion
description Suppressing the nucleophilic susceptibility of ionic liquids based nanofluid is necessary for energy storage and superoxide ion (O-2(center dot-)) utilization. This study reports the development of novel pseudocapacitive Fe/Ru-SiMWCNT nanofluid comprising of Fe3O4, RuO2, SiO2, and MWCNT hybridized phases. The Fe/Ru-SiMWCNT nanohybrid possessed CO2 and O-2 sorption capability, as confirmed from the temperature-programmed desorption experiments. Detailed spectroscopy techniques characterize the Fe/Ru-SiMWCNT nanohybrid component's physicochemical and morphological properties. The novel ionic liquid (IL) based nanofluid index is Fe/Ru-SiMWCNT/1(2-methoxyethyl)-1-methylpyrrolidinium tris(pentafluoroethyl) trifluorophosphate. Therefore, stable O-2(center dot-) was generated therein at 0.445 V vs Ag/AgCl and recorded long-term stability for 2 days with 87.31 % efficiency. Moreover, the O-2(center dot-) mediated CO2 conversion to C2O62- at 0.54 V vs Ag/AgCl with 97.90 % energy efficiency. Also, the normalized exchange current density in the nanofluid was 2.20 mA/cm(2), which is higher than 1.94 mA/cm(2) observed in the IL counterpart. The high normalized exchange current density is due to Fe/Ru-SiMWCNT nanohybrid phase's pseudocapacitance. Accordingly, this pseudocapacitive capability enables converting O-2 and CO2 in the nanofluid with lower activation overpotential of 0.305 and 0.460 V vs Ag/AgCl, respectively. In contrast, the conversion of O-2 and CO2 in the IL required higher activation overpotential of -0.826 and -1.013 V vs Ag/AgCl, respectively. The electrolysis of O-2/CO2 in the nanofluid containing diethanolamine at 1.564 V vs Ag/AgCl, 60 degrees C and 1.0 h produced methyl 2-hydroxyethyl (methyl) carbamate as the primary product. The heteronuclear multiple bond correlation spectroscopy analysis finally elucidated the carbamate structure by two strong correlations between the protons and carbons in the vicinity of three and four bonds apart. Therefore, this study highlights the control design of electrochemically stable IL-based nanofluids robust for reactive oxygen species, energy storage and conversion.
format Article
author Halilu, Ahmed
Hayyan, Maan
Aroua, Mohamed Kheireddine
Yusoff, Rozita
Hizaddin, Hanee F.
Basirun, Wan Jefrey
author_facet Halilu, Ahmed
Hayyan, Maan
Aroua, Mohamed Kheireddine
Yusoff, Rozita
Hizaddin, Hanee F.
Basirun, Wan Jefrey
author_sort Halilu, Ahmed
title Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion
title_short Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion
title_full Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion
title_fullStr Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion
title_full_unstemmed Hybridized Fe/Ru-SiMWCNT-ionic liquid nanofluid for CO2 conversion into carbamate using superoxide ion
title_sort hybridized fe/ru-simwcnt-ionic liquid nanofluid for co2 conversion into carbamate using superoxide ion
publisher Elsevier Science Ltd
publishDate 2021
url http://eprints.um.edu.my/28295/
_version_ 1740826002164023296
score 13.211869

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