Influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties

Comparative analysis of copper nanoparticles (CuNPs) obtained by electrodeposition on highly oriented pyrolytic graphite (HOPG) substrates from different supporting electrolytes containing sulphate anions, was performed. Voltammetric results indicated that Cu electrodeposition follows a diffusion-c...

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Autores principales:	Silvana García, Noelia Zurita
Formato:	article
Lenguaje:	EN
Publicado:	International Association of Physical Chemists (IAPC) 2021
Materias:	Copper nanocrystals electrodeposition plating solution highly oriented pyrolytic graphite (HOPG) nitrate reduction Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/8817dc49cc164142b4a1ff3c5de67f9e
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spelling	oai:doaj.org-article:8817dc49cc164142b4a1ff3c5de67f9e2021-11-23T10:13:57ZInfluence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties10.5599/jese.10771847-9286https://doaj.org/article/8817dc49cc164142b4a1ff3c5de67f9e2021-11-01T00:00:00Zhttps://www.pub.iapchem.org/ojs/index.php/JESE/article/view/1077https://doaj.org/toc/1847-9286 Comparative analysis of copper nanoparticles (CuNPs) obtained by electrodeposition on highly oriented pyrolytic graphite (HOPG) substrates from different supporting electrolytes containing sulphate anions, was performed. Voltammetric results indicated that Cu electrodeposition follows a diffusion-controlled nucleation and crystal growth model for three solutions studied (Na2SO4, H2SO4 and Na2SO4+H2SO4). Na2SO4 solution was found to be most effective because the copper reduction occurs at most positive potential value, reaching the highest current density. Analysis of potentiostatic current transients revealed that the process can be described predominantly by a model involving 3D-progressive nucleation mechanism, which was corroborated by scanning electron microscopy (SEM) analysis. SEM images showed high density of hemispherical shaped Cu particles of different sizes (mostly between 80-150 nm), randomly distributed on the HOPG surface for Na2SO4 electrolyte solution. In the presence of H2SO4, the size dispersion decreased, resulting in particles with greater diameters (up to 339 nm). The use of electrolyte solution with Na2SO4+H2SO4 revealed lower particle density with a considerable crystal size dispersion, where very small crystallites are prevailing. Cyclic voltammetry was used to evaluate qualitatively the catalytic activity of CuNPs deposited from three electrolyte solutions towards the nitrate reduction reaction. An enhanced catalytic effect was obtained when copper particles were prepared from either Na2SO4 or H2SO4 supporting electrolytes. Silvana GarcíaNoelia ZuritaInternational Association of Physical Chemists (IAPC)articleCopper nanocrystalselectrodepositionplating solutionhighly oriented pyrolytic graphite (HOPG)nitrate reductionChemistryQD1-999ENJournal of Electrochemical Science and Engineering, Vol 11, Iss 3 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Copper nanocrystals electrodeposition plating solution highly oriented pyrolytic graphite (HOPG) nitrate reduction Chemistry QD1-999
spellingShingle	Copper nanocrystals electrodeposition plating solution highly oriented pyrolytic graphite (HOPG) nitrate reduction Chemistry QD1-999 Silvana García Noelia Zurita Influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties
description	Comparative analysis of copper nanoparticles (CuNPs) obtained by electrodeposition on highly oriented pyrolytic graphite (HOPG) substrates from different supporting electrolytes containing sulphate anions, was performed. Voltammetric results indicated that Cu electrodeposition follows a diffusion-controlled nucleation and crystal growth model for three solutions studied (Na2SO4, H2SO4 and Na2SO4+H2SO4). Na2SO4 solution was found to be most effective because the copper reduction occurs at most positive potential value, reaching the highest current density. Analysis of potentiostatic current transients revealed that the process can be described predominantly by a model involving 3D-progressive nucleation mechanism, which was corroborated by scanning electron microscopy (SEM) analysis. SEM images showed high density of hemispherical shaped Cu particles of different sizes (mostly between 80-150 nm), randomly distributed on the HOPG surface for Na2SO4 electrolyte solution. In the presence of H2SO4, the size dispersion decreased, resulting in particles with greater diameters (up to 339 nm). The use of electrolyte solution with Na2SO4+H2SO4 revealed lower particle density with a considerable crystal size dispersion, where very small crystallites are prevailing. Cyclic voltammetry was used to evaluate qualitatively the catalytic activity of CuNPs deposited from three electrolyte solutions towards the nitrate reduction reaction. An enhanced catalytic effect was obtained when copper particles were prepared from either Na2SO4 or H2SO4 supporting electrolytes.
format	article
author	Silvana García Noelia Zurita
author_facet	Silvana García Noelia Zurita
author_sort	Silvana García
title	Influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties
title_short	Influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties
title_full	Influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties
title_fullStr	Influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties
title_full_unstemmed	Influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties
title_sort	influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties
publisher	International Association of Physical Chemists (IAPC)
publishDate	2021
url	https://doaj.org/article/8817dc49cc164142b4a1ff3c5de67f9e
work_keys_str_mv	AT silvanagarcia influenceofsupportingelectrolyteonelectrochemicalformationofcoppernanoparticlesandtheirelectrocatalyticproperties AT noeliazurita influenceofsupportingelectrolyteonelectrochemicalformationofcoppernanoparticlesandtheirelectrocatalyticproperties
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Influence of supporting electrolyte on electrochemical formation of copper nanoparticles and their electrocatalytic properties

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