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Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction

Platinum-based materials are widely known as the most utilized and advanced catalysts for hydrogen evolution reaction. For this reason, several studies have reported alternative methods of incorporating this metal into more economical electrodes with a carbon-based support material. Herein, we repor...

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Autores principales: Balint, Lorena-Cristina, Hulka, Iosif, Kellenberger, Andrea
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8745806/
https://www.ncbi.nlm.nih.gov/pubmed/35009219
http://dx.doi.org/10.3390/ma15010073
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author Balint, Lorena-Cristina
Hulka, Iosif
Kellenberger, Andrea
author_facet Balint, Lorena-Cristina
Hulka, Iosif
Kellenberger, Andrea
author_sort Balint, Lorena-Cristina
collection PubMed
description Platinum-based materials are widely known as the most utilized and advanced catalysts for hydrogen evolution reaction. For this reason, several studies have reported alternative methods of incorporating this metal into more economical electrodes with a carbon-based support material. Herein, we report on the performance of pencil graphite electrodes decorated with electrochemically deposited platinum nanoparticles as efficient electrocatalysts for hydrogen evolution reaction. The electrodeposition of platinum was performed via pulsed current electrodeposition and the effect of current density on the electrocatalytic activity was investigated. The obtained electrodes were characterized using cyclic voltammetry, while the electrocatalytic activity was assessed through linear sweep voltammetry. Field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy were utilised to gain an insight into surface morphology and chemical analysis of platinum nanoparticles. The best performing electrocatalyst, at both low and high current densities, was characterized by the highest exchange current density of 1.98 mA cm(−2) and an ultralow overpotential of 43 mV at a current density of 10 mA cm(−2). The results show that, at low current densities, performances closest to that of platinum can be achieved even with an ultralow loading of 50 µg cm(−2) Pt.
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spelling pubmed-87458062022-01-11 Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction Balint, Lorena-Cristina Hulka, Iosif Kellenberger, Andrea Materials (Basel) Article Platinum-based materials are widely known as the most utilized and advanced catalysts for hydrogen evolution reaction. For this reason, several studies have reported alternative methods of incorporating this metal into more economical electrodes with a carbon-based support material. Herein, we report on the performance of pencil graphite electrodes decorated with electrochemically deposited platinum nanoparticles as efficient electrocatalysts for hydrogen evolution reaction. The electrodeposition of platinum was performed via pulsed current electrodeposition and the effect of current density on the electrocatalytic activity was investigated. The obtained electrodes were characterized using cyclic voltammetry, while the electrocatalytic activity was assessed through linear sweep voltammetry. Field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy were utilised to gain an insight into surface morphology and chemical analysis of platinum nanoparticles. The best performing electrocatalyst, at both low and high current densities, was characterized by the highest exchange current density of 1.98 mA cm(−2) and an ultralow overpotential of 43 mV at a current density of 10 mA cm(−2). The results show that, at low current densities, performances closest to that of platinum can be achieved even with an ultralow loading of 50 µg cm(−2) Pt. MDPI 2021-12-23 /pmc/articles/PMC8745806/ /pubmed/35009219 http://dx.doi.org/10.3390/ma15010073 Text en © 2021 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
Balint, Lorena-Cristina
Hulka, Iosif
Kellenberger, Andrea
Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction
title Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction
title_full Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction
title_fullStr Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction
title_full_unstemmed Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction
title_short Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction
title_sort pencil graphite electrodes decorated with platinum nanoparticles as efficient electrocatalysts for hydrogen evolution reaction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8745806/
https://www.ncbi.nlm.nih.gov/pubmed/35009219
http://dx.doi.org/10.3390/ma15010073
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