Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol

Composite nanostructure materials are widely used in catalysis. They exhibit several characteristics, such as the unique structural advantage and the synergism among their components, which significantly enhances their catalytic performance. In this work, CoPt nanoparticles and reduced-graphene-oxid...

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Autores principales:	Xiaolong Zhang, Lei Chen, Yang Liu, Qian Duan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	rGO/CoPt/Ag NaBH<sub>4</sub> catalytic reduction 4-nitrophenol Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/de2ca32b99d549afb050e0945fb9b055
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spelling	oai:doaj.org-article:de2ca32b99d549afb050e0945fb9b0552021-11-25T17:06:01ZPreparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol10.3390/catal111113362073-4344https://doaj.org/article/de2ca32b99d549afb050e0945fb9b0552021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1336https://doaj.org/toc/2073-4344Composite nanostructure materials are widely used in catalysis. They exhibit several characteristics, such as the unique structural advantage and the synergism among their components, which significantly enhances their catalytic performance. In this work, CoPt nanoparticles and reduced-graphene-oxide-based nanocomposite catalysts (rGO/CoPt, rGO/CoPt/Ag) were prepared by using a facile co-reduction strategy. The crystalline structure, morphology, composition, and optical characteristics of the CoPt nanoparticles, rGO/CoPt nanocomposite, and rGO/CoPt/Ag nanocomposite catalysts were investigated by a set of techniques. The <i>I<sub>D</sub>/I<sub>G</sub></i> value of the rGO/CoPt/Ag nanocomposite is 1.158, higher than that of rGO/CoPt (1.042). The kinetic apparent rate constant, k, of the rGO/CoPt/Ag nanocomposite against 4-nitrophenol (4-NP) reduction is 5.306 min<sup>−1</sup>, which is higher than that of CoPt (0.495 min<sup>−1</sup>) and rGO/CoPt (1.283 min<sup>−1</sup>). The normalized rate constant, k<sub>nor</sub>, of the rGO/CoPt/Ag nanocomposite is 56.76 min<sup>−1</sup>mg<sup>−1</sup>, which is higher than some other catalytic materials. The rGO/CoPt/Ag nanocomposite shows a significantly enhanced catalytic performance when compared to CoPt nanoparticles and the rGO/CoPt nanocomposite, which may confirm that the novel rGO/CoPt/Ag nanocomposite is a promising catalyst for the application of catalytic fields.Xiaolong ZhangLei ChenYang LiuQian DuanMDPI AGarticlerGO/CoPt/AgNaBH<sub>4</sub>catalytic reduction4-nitrophenolChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1336, p 1336 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	rGO/CoPt/Ag NaBH<sub>4</sub> catalytic reduction 4-nitrophenol Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	rGO/CoPt/Ag NaBH<sub>4</sub> catalytic reduction 4-nitrophenol Chemical technology TP1-1185 Chemistry QD1-999 Xiaolong Zhang Lei Chen Yang Liu Qian Duan Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol
description	Composite nanostructure materials are widely used in catalysis. They exhibit several characteristics, such as the unique structural advantage and the synergism among their components, which significantly enhances their catalytic performance. In this work, CoPt nanoparticles and reduced-graphene-oxide-based nanocomposite catalysts (rGO/CoPt, rGO/CoPt/Ag) were prepared by using a facile co-reduction strategy. The crystalline structure, morphology, composition, and optical characteristics of the CoPt nanoparticles, rGO/CoPt nanocomposite, and rGO/CoPt/Ag nanocomposite catalysts were investigated by a set of techniques. The <i>I<sub>D</sub>/I<sub>G</sub></i> value of the rGO/CoPt/Ag nanocomposite is 1.158, higher than that of rGO/CoPt (1.042). The kinetic apparent rate constant, k, of the rGO/CoPt/Ag nanocomposite against 4-nitrophenol (4-NP) reduction is 5.306 min<sup>−1</sup>, which is higher than that of CoPt (0.495 min<sup>−1</sup>) and rGO/CoPt (1.283 min<sup>−1</sup>). The normalized rate constant, k<sub>nor</sub>, of the rGO/CoPt/Ag nanocomposite is 56.76 min<sup>−1</sup>mg<sup>−1</sup>, which is higher than some other catalytic materials. The rGO/CoPt/Ag nanocomposite shows a significantly enhanced catalytic performance when compared to CoPt nanoparticles and the rGO/CoPt nanocomposite, which may confirm that the novel rGO/CoPt/Ag nanocomposite is a promising catalyst for the application of catalytic fields.
format	article
author	Xiaolong Zhang Lei Chen Yang Liu Qian Duan
author_facet	Xiaolong Zhang Lei Chen Yang Liu Qian Duan
author_sort	Xiaolong Zhang
title	Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol
title_short	Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol
title_full	Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol
title_fullStr	Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol
title_full_unstemmed	Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol
title_sort	preparation of reduced-graphene-oxide-supported copt and ag nanoparticles for the catalytic reduction of 4-nitrophenol
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/de2ca32b99d549afb050e0945fb9b055
work_keys_str_mv	AT xiaolongzhang preparationofreducedgrapheneoxidesupportedcoptandagnanoparticlesforthecatalyticreductionof4nitrophenol AT leichen preparationofreducedgrapheneoxidesupportedcoptandagnanoparticlesforthecatalyticreductionof4nitrophenol AT yangliu preparationofreducedgrapheneoxidesupportedcoptandagnanoparticlesforthecatalyticreductionof4nitrophenol AT qianduan preparationofreducedgrapheneoxidesupportedcoptandagnanoparticlesforthecatalyticreductionof4nitrophenol
_version_	1718412746139107328

Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol

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