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Metal–organic framework–derived Ni@C and NiO@C as anode catalysts for urea fuel cells

Highly porous self-assembled nanostructured Ni@C and NiO@C were synthesized via calcination of a Ni-based metal–organic framework. The morphology, structure, and composition of as synthesized Ni@C and NiO@C were characterized by SEM, FIB-SEM, TEM, and XRD. The electro-catalytic activity of the Ni@C...

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Autores principales: Tran, Thao Quynh Ngan, Park, Bang Ju, Yun, Woo Hyun, Duong, Tien Nhac, Yoon, Hyon Hee
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6959365/
https://www.ncbi.nlm.nih.gov/pubmed/31937844
http://dx.doi.org/10.1038/s41598-019-57139-7
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author Tran, Thao Quynh Ngan
Park, Bang Ju
Yun, Woo Hyun
Duong, Tien Nhac
Yoon, Hyon Hee
author_facet Tran, Thao Quynh Ngan
Park, Bang Ju
Yun, Woo Hyun
Duong, Tien Nhac
Yoon, Hyon Hee
author_sort Tran, Thao Quynh Ngan
collection PubMed
description Highly porous self-assembled nanostructured Ni@C and NiO@C were synthesized via calcination of a Ni-based metal–organic framework. The morphology, structure, and composition of as synthesized Ni@C and NiO@C were characterized by SEM, FIB-SEM, TEM, and XRD. The electro-catalytic activity of the Ni@C and NiO@C catalysts towards urea oxidation was investigated using cyclic voltammetry. It was found that the Ni@C had a higher residual carbon content and a higher specific surface area than NiO@C, thus exhibiting an enhanced electrochemical performance for urea oxidation. A direct urea fuel cell with Ni@C as an anode catalyst featured an excellent maximum power density of 13.8 mW cm(−2) with 0.33 M urea solution in 1 M KOH as fuel and humidified air as oxidant at 50 °C, additionally showing excellent stability during continuous 20-h operation. Thus, this work showed that the highly porous carbon-supported Ni catalysts derived from Ni-based metal–organic framework can be used for urea oxidation and as an efficient anode material for urea fuel cells.
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spelling pubmed-69593652020-01-17 Metal–organic framework–derived Ni@C and NiO@C as anode catalysts for urea fuel cells Tran, Thao Quynh Ngan Park, Bang Ju Yun, Woo Hyun Duong, Tien Nhac Yoon, Hyon Hee Sci Rep Article Highly porous self-assembled nanostructured Ni@C and NiO@C were synthesized via calcination of a Ni-based metal–organic framework. The morphology, structure, and composition of as synthesized Ni@C and NiO@C were characterized by SEM, FIB-SEM, TEM, and XRD. The electro-catalytic activity of the Ni@C and NiO@C catalysts towards urea oxidation was investigated using cyclic voltammetry. It was found that the Ni@C had a higher residual carbon content and a higher specific surface area than NiO@C, thus exhibiting an enhanced electrochemical performance for urea oxidation. A direct urea fuel cell with Ni@C as an anode catalyst featured an excellent maximum power density of 13.8 mW cm(−2) with 0.33 M urea solution in 1 M KOH as fuel and humidified air as oxidant at 50 °C, additionally showing excellent stability during continuous 20-h operation. Thus, this work showed that the highly porous carbon-supported Ni catalysts derived from Ni-based metal–organic framework can be used for urea oxidation and as an efficient anode material for urea fuel cells. Nature Publishing Group UK 2020-01-14 /pmc/articles/PMC6959365/ /pubmed/31937844 http://dx.doi.org/10.1038/s41598-019-57139-7 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Tran, Thao Quynh Ngan
Park, Bang Ju
Yun, Woo Hyun
Duong, Tien Nhac
Yoon, Hyon Hee
Metal–organic framework–derived Ni@C and NiO@C as anode catalysts for urea fuel cells
title Metal–organic framework–derived Ni@C and NiO@C as anode catalysts for urea fuel cells
title_full Metal–organic framework–derived Ni@C and NiO@C as anode catalysts for urea fuel cells
title_fullStr Metal–organic framework–derived Ni@C and NiO@C as anode catalysts for urea fuel cells
title_full_unstemmed Metal–organic framework–derived Ni@C and NiO@C as anode catalysts for urea fuel cells
title_short Metal–organic framework–derived Ni@C and NiO@C as anode catalysts for urea fuel cells
title_sort metal–organic framework–derived ni@c and nio@c as anode catalysts for urea fuel cells
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6959365/
https://www.ncbi.nlm.nih.gov/pubmed/31937844
http://dx.doi.org/10.1038/s41598-019-57139-7
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