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Cobalt-Doped Carbon Nitride Frameworks Obtained from Calcined Aromatic Polyimines as Cathode Catalyst of Anion Exchange Membrane Fuel Cells

Cobalt-doped carbon nitride frameworks (CoNC) were prepared from the calcination of Co-chelated aromatic polyimines (APIM) synthesized from stepwise polymerization of p-phenylene diamine (PDA) and o-phthalaldehyde (OPAl) via Schiff base reactions in the presence of cobalt (II) chloride. The Co-chela...

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Autores principales: Hsieh, Tar-Hwa, Chen, Sin-Nan, Wang, Yen-Zen, Ho, Ko-Shan, Chuang, Jung-Kuan, Ho, Lin-Chia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8779780/
https://www.ncbi.nlm.nih.gov/pubmed/35054600
http://dx.doi.org/10.3390/membranes12010074
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author Hsieh, Tar-Hwa
Chen, Sin-Nan
Wang, Yen-Zen
Ho, Ko-Shan
Chuang, Jung-Kuan
Ho, Lin-Chia
author_facet Hsieh, Tar-Hwa
Chen, Sin-Nan
Wang, Yen-Zen
Ho, Ko-Shan
Chuang, Jung-Kuan
Ho, Lin-Chia
author_sort Hsieh, Tar-Hwa
collection PubMed
description Cobalt-doped carbon nitride frameworks (CoNC) were prepared from the calcination of Co-chelated aromatic polyimines (APIM) synthesized from stepwise polymerization of p-phenylene diamine (PDA) and o-phthalaldehyde (OPAl) via Schiff base reactions in the presence of cobalt (II) chloride. The Co-chelated APIM (Co-APIM) precursor converted to CoNC after calcination in two-step heating with the second step performed at 100 °C lower than the first one. The CoNCs demonstrated that its Co, N-co-doped carbonaceous framework contained both graphene and carbon nanotube, as characterized by X-ray diffraction pattern, Raman spectra, and TEM micropictures. CoNCs also revealed a significant ORR peak in the current–voltage polarization cycle and a higher O(2) reduction current than that of commercial Pt/C in a linear scanning voltage test in O(2)-saturated KOH((aq)). The calculated e-transferred number even reaches 3.94 in KOH((aq)) for the CoNC1000A900 cathode catalyst, which has the highest BET surface area of 393.94 m(2) g(−1). Single cells of anion exchange membrane fuel cells (AEMFCs) are fabricated using different CoNCs as the cathode catalysts, and CoNC1000A900 demonstrates a peak power density of 374.3 compared to the 334.7 mW cm(−2) obtained from the single cell using Pt/C as the cathode catalyst.
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spelling pubmed-87797802022-01-22 Cobalt-Doped Carbon Nitride Frameworks Obtained from Calcined Aromatic Polyimines as Cathode Catalyst of Anion Exchange Membrane Fuel Cells Hsieh, Tar-Hwa Chen, Sin-Nan Wang, Yen-Zen Ho, Ko-Shan Chuang, Jung-Kuan Ho, Lin-Chia Membranes (Basel) Article Cobalt-doped carbon nitride frameworks (CoNC) were prepared from the calcination of Co-chelated aromatic polyimines (APIM) synthesized from stepwise polymerization of p-phenylene diamine (PDA) and o-phthalaldehyde (OPAl) via Schiff base reactions in the presence of cobalt (II) chloride. The Co-chelated APIM (Co-APIM) precursor converted to CoNC after calcination in two-step heating with the second step performed at 100 °C lower than the first one. The CoNCs demonstrated that its Co, N-co-doped carbonaceous framework contained both graphene and carbon nanotube, as characterized by X-ray diffraction pattern, Raman spectra, and TEM micropictures. CoNCs also revealed a significant ORR peak in the current–voltage polarization cycle and a higher O(2) reduction current than that of commercial Pt/C in a linear scanning voltage test in O(2)-saturated KOH((aq)). The calculated e-transferred number even reaches 3.94 in KOH((aq)) for the CoNC1000A900 cathode catalyst, which has the highest BET surface area of 393.94 m(2) g(−1). Single cells of anion exchange membrane fuel cells (AEMFCs) are fabricated using different CoNCs as the cathode catalysts, and CoNC1000A900 demonstrates a peak power density of 374.3 compared to the 334.7 mW cm(−2) obtained from the single cell using Pt/C as the cathode catalyst. MDPI 2022-01-06 /pmc/articles/PMC8779780/ /pubmed/35054600 http://dx.doi.org/10.3390/membranes12010074 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hsieh, Tar-Hwa
Chen, Sin-Nan
Wang, Yen-Zen
Ho, Ko-Shan
Chuang, Jung-Kuan
Ho, Lin-Chia
Cobalt-Doped Carbon Nitride Frameworks Obtained from Calcined Aromatic Polyimines as Cathode Catalyst of Anion Exchange Membrane Fuel Cells
title Cobalt-Doped Carbon Nitride Frameworks Obtained from Calcined Aromatic Polyimines as Cathode Catalyst of Anion Exchange Membrane Fuel Cells
title_full Cobalt-Doped Carbon Nitride Frameworks Obtained from Calcined Aromatic Polyimines as Cathode Catalyst of Anion Exchange Membrane Fuel Cells
title_fullStr Cobalt-Doped Carbon Nitride Frameworks Obtained from Calcined Aromatic Polyimines as Cathode Catalyst of Anion Exchange Membrane Fuel Cells
title_full_unstemmed Cobalt-Doped Carbon Nitride Frameworks Obtained from Calcined Aromatic Polyimines as Cathode Catalyst of Anion Exchange Membrane Fuel Cells
title_short Cobalt-Doped Carbon Nitride Frameworks Obtained from Calcined Aromatic Polyimines as Cathode Catalyst of Anion Exchange Membrane Fuel Cells
title_sort cobalt-doped carbon nitride frameworks obtained from calcined aromatic polyimines as cathode catalyst of anion exchange membrane fuel cells
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8779780/
https://www.ncbi.nlm.nih.gov/pubmed/35054600
http://dx.doi.org/10.3390/membranes12010074
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