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Ni(2)P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea
The electro-oxidation of urea (EOU) is a remarkable but challenging sustainable technology, which largely needs a reduced electro-chemical potential, that demonstrates the ability to remove a notable harmful material from wastewater and/or transform the excretory product of humans into treasure. In...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9611741/ https://www.ncbi.nlm.nih.gov/pubmed/36296823 http://dx.doi.org/10.3390/nano12203633 |
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author | Ma, Kun Wang, Hui Kannan, Palanisamy Subramanian, Palaniappan |
author_facet | Ma, Kun Wang, Hui Kannan, Palanisamy Subramanian, Palaniappan |
author_sort | Ma, Kun |
collection | PubMed |
description | The electro-oxidation of urea (EOU) is a remarkable but challenging sustainable technology, which largely needs a reduced electro-chemical potential, that demonstrates the ability to remove a notable harmful material from wastewater and/or transform the excretory product of humans into treasure. In this work, an Ni(2)P-nanoparticle-integrated porous nickel oxide (NiO) hetero-structured nanosheet (Ni(2)P@NiO/NiF) catalyst was synthesized through in situ acid etching and a gas-phase phosphating process. The as-synthesized Ni(2)P@NiO/NiF catalyst sample was then used to enhance the electro-oxidation reaction of urea with a higher urea oxidation response (50 mA cm(−2) at 1.31 V vs. RHE) and low onset oxidation potential (1.31 V). The enhanced activity of the Ni(2)P@NiO/NiF catalyst was mainly attributed to effective electron transport after Ni(2)P nanoparticle insertion through a substantial improvement in active sites due to a larger electrochemical surface area, and a faster diffusion of ions occurred via the interactive sites at the interface of Ni(2)P and NiO; thus, the structural reliability was retained, which was further evidenced by the low charge transfer resistance. Further, the Ni(2)P nanoparticle insertion process into the NiO hetero-structured nanosheets effectively enabled a synergetic effect when compared to the counter of the Ni(2)P/NiF and NiO/NiF catalysts. Finally, we demonstrate that the as-synthesized Ni(2)P@NiO/NiF catalyst could be a promising electrode for the EOU in urea-rich wastewater and human urine samples for environmental safety management. Overall, the Ni(2)P@NiO/NiF catalyst electrode combines the advantages of the Ni(2)P catalyst, NiO nanosheet network, and NiF current collector for enhanced EOU performance, which is highly valuable in catalyst development for environmental safety applications. |
format | Online Article Text |
id | pubmed-9611741 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96117412022-10-28 Ni(2)P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea Ma, Kun Wang, Hui Kannan, Palanisamy Subramanian, Palaniappan Nanomaterials (Basel) Article The electro-oxidation of urea (EOU) is a remarkable but challenging sustainable technology, which largely needs a reduced electro-chemical potential, that demonstrates the ability to remove a notable harmful material from wastewater and/or transform the excretory product of humans into treasure. In this work, an Ni(2)P-nanoparticle-integrated porous nickel oxide (NiO) hetero-structured nanosheet (Ni(2)P@NiO/NiF) catalyst was synthesized through in situ acid etching and a gas-phase phosphating process. The as-synthesized Ni(2)P@NiO/NiF catalyst sample was then used to enhance the electro-oxidation reaction of urea with a higher urea oxidation response (50 mA cm(−2) at 1.31 V vs. RHE) and low onset oxidation potential (1.31 V). The enhanced activity of the Ni(2)P@NiO/NiF catalyst was mainly attributed to effective electron transport after Ni(2)P nanoparticle insertion through a substantial improvement in active sites due to a larger electrochemical surface area, and a faster diffusion of ions occurred via the interactive sites at the interface of Ni(2)P and NiO; thus, the structural reliability was retained, which was further evidenced by the low charge transfer resistance. Further, the Ni(2)P nanoparticle insertion process into the NiO hetero-structured nanosheets effectively enabled a synergetic effect when compared to the counter of the Ni(2)P/NiF and NiO/NiF catalysts. Finally, we demonstrate that the as-synthesized Ni(2)P@NiO/NiF catalyst could be a promising electrode for the EOU in urea-rich wastewater and human urine samples for environmental safety management. Overall, the Ni(2)P@NiO/NiF catalyst electrode combines the advantages of the Ni(2)P catalyst, NiO nanosheet network, and NiF current collector for enhanced EOU performance, which is highly valuable in catalyst development for environmental safety applications. MDPI 2022-10-17 /pmc/articles/PMC9611741/ /pubmed/36296823 http://dx.doi.org/10.3390/nano12203633 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 Ma, Kun Wang, Hui Kannan, Palanisamy Subramanian, Palaniappan Ni(2)P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea |
title | Ni(2)P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea |
title_full | Ni(2)P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea |
title_fullStr | Ni(2)P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea |
title_full_unstemmed | Ni(2)P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea |
title_short | Ni(2)P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea |
title_sort | ni(2)p nanoparticle-inserted porous layered nio hetero-structured nanosheets as a durable catalyst for the electro-oxidation of urea |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9611741/ https://www.ncbi.nlm.nih.gov/pubmed/36296823 http://dx.doi.org/10.3390/nano12203633 |
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