Stable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium

Abstract NiFe nanoparticles-decorated & N-doped graphene is introduced as an effective and stable non-precious electrocatalyst for ORR in the acid medium. Compared to conventional Pt/C electrodes under the same conditions, the proposed nanocatalyst shows closer onset potential and current densit...

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Autores principales:	Nasser A. M. Barakat, Ahmed G. El-Deen, Zafar Khan Ghouri, Saeed Al-Meer
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/335388faabe243628d68320255243bf9
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spelling	oai:doaj.org-article:335388faabe243628d68320255243bf92021-12-02T15:09:03ZStable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium10.1038/s41598-018-22114-12045-2322https://doaj.org/article/335388faabe243628d68320255243bf92018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-22114-1https://doaj.org/toc/2045-2322Abstract NiFe nanoparticles-decorated & N-doped graphene is introduced as an effective and stable non-precious electrocatalyst for ORR in the acid medium. Compared to conventional Pt/C electrodes under the same conditions, the proposed nanocatalyst shows closer onset potential and current density. Typically, the observed onset potentials and current densities for the synthesized and Pt/C electrodes are 825 and 910 mV (vs. NHE) and −3.65 and −4.31 mA.cm−2 (at 5 mV.s−1), respectively. However, the most important advantage of the introduced metallic alloy-decorated graphene is its distinct stability in acid medium; the retention in the electrocatalytic performance after 1,000 successive cycles is approximately 98%. This finding is attributed to the high corrosion resistance of the NiFe alloy. The kinetic study indicates that the number of the transferred electrons is 3.46 and 3.89 for the introduced and Pt/C (20 wt%) electrodes, respectively which concludes a high activity for the proposed nanocomposite. The suggested decorated graphene can be synthesized using a multi-thermal method. Typically, nickel acetate, iron acetate, graphene oxide and urea are subjected to MW heating. Then, sintering with melamine in an Argon atmosphere at 750 °C is required to produce the final electrocatalyst. Overall, the introduced NiFe@ N-doped Gr nanocomposite shows remarkable electrochemical activity in the acid medium with long-term stability.Nasser A. M. BarakatAhmed G. El-DeenZafar Khan GhouriSaeed Al-MeerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nasser A. M. Barakat Ahmed G. El-Deen Zafar Khan Ghouri Saeed Al-Meer Stable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium
description	Abstract NiFe nanoparticles-decorated & N-doped graphene is introduced as an effective and stable non-precious electrocatalyst for ORR in the acid medium. Compared to conventional Pt/C electrodes under the same conditions, the proposed nanocatalyst shows closer onset potential and current density. Typically, the observed onset potentials and current densities for the synthesized and Pt/C electrodes are 825 and 910 mV (vs. NHE) and −3.65 and −4.31 mA.cm−2 (at 5 mV.s−1), respectively. However, the most important advantage of the introduced metallic alloy-decorated graphene is its distinct stability in acid medium; the retention in the electrocatalytic performance after 1,000 successive cycles is approximately 98%. This finding is attributed to the high corrosion resistance of the NiFe alloy. The kinetic study indicates that the number of the transferred electrons is 3.46 and 3.89 for the introduced and Pt/C (20 wt%) electrodes, respectively which concludes a high activity for the proposed nanocomposite. The suggested decorated graphene can be synthesized using a multi-thermal method. Typically, nickel acetate, iron acetate, graphene oxide and urea are subjected to MW heating. Then, sintering with melamine in an Argon atmosphere at 750 °C is required to produce the final electrocatalyst. Overall, the introduced NiFe@ N-doped Gr nanocomposite shows remarkable electrochemical activity in the acid medium with long-term stability.
format	article
author	Nasser A. M. Barakat Ahmed G. El-Deen Zafar Khan Ghouri Saeed Al-Meer
author_facet	Nasser A. M. Barakat Ahmed G. El-Deen Zafar Khan Ghouri Saeed Al-Meer
author_sort	Nasser A. M. Barakat
title	Stable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium
title_short	Stable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium
title_full	Stable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium
title_fullStr	Stable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium
title_full_unstemmed	Stable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium
title_sort	stable n-doped & feni-decorated graphene non-precious electrocatalyst for oxygen reduction reaction in acid medium
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/335388faabe243628d68320255243bf9
work_keys_str_mv	AT nasserambarakat stablendopedfenidecoratedgraphenenonpreciouselectrocatalystforoxygenreductionreactioninacidmedium AT ahmedgeldeen stablendopedfenidecoratedgraphenenonpreciouselectrocatalystforoxygenreductionreactioninacidmedium AT zafarkhanghouri stablendopedfenidecoratedgraphenenonpreciouselectrocatalystforoxygenreductionreactioninacidmedium AT saeedalmeer stablendopedfenidecoratedgraphenenonpreciouselectrocatalystforoxygenreductionreactioninacidmedium
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Stable N-doped & FeNi-decorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium

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