Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol

Methanol electrochemical oxidation in a direct methanol fuel cell (DMFC) is considered to be an efficient pathway for generating renewable energy with low pollutant emissions. NiO−CuO and Ni0.95Cr0.05O2+δ thin films were synthesize...

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Autores principales:	Rimsha Liaqat, Muhammad Adil Mansoor, Javed Iqbal, Asim Jilani, Sehar Shakir, Abul Kalam, S. Wageh
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	nickel-copper-chromium oxide thin films XPS and XRD methanol oxidation Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/1395f2aed6884f75a301a95d0b762575
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spelling	oai:doaj.org-article:1395f2aed6884f75a301a95d0b7625752021-11-25T17:19:22ZFabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol10.3390/cryst111113982073-4352https://doaj.org/article/1395f2aed6884f75a301a95d0b7625752021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1398https://doaj.org/toc/2073-4352Methanol electrochemical oxidation in a direct methanol fuel cell (DMFC) is considered to be an efficient pathway for generating renewable energy with low pollutant emissions. NiO−CuO and Ni<sub>0.95</sub>Cr<sub>0.05</sub>O<sub>2+δ</sub> thin films were synthesized using a simple dip-coating method and tested for the electro-oxidation of methanol. These synthesized electrocatalysts were characterized by X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and Raman spectroscopy. Different electrochemical techniques were used to investigate the catalytic activity of these prepared electrocatalysts for methanol oxidation, including linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). In the presence of 0.3 M methanol, the current densities of NiO−CuO and Ni<sub>0.95</sub>Cr<sub>0.05</sub>O<sub>2+δ</sub> thin films were found to be 12.2 mA·cm<sup>−2</sup> and 6.5 mA·cm<sup>−2</sup>, respectively. The enhanced catalytic activity of NiO−CuO and Ni<sub>0.95</sub>Cr<sub>0.05</sub>O<sub>2+δ</sub> thin films may be a result of the synergistic effect between different metal oxides. The Chronoamperometry (CA) results of the mixed metal oxide thin films confirmed their stability in basic media. Furthermore, the findings of electrochemical impedance spectroscopy (EIS) of mixed metal oxide thin films demonstrated a lower charge transfer resistance as compared to the pure NiO, CuO, and Cr<sub>2</sub>O<sub>3</sub> thin films.Rimsha LiaqatMuhammad Adil MansoorJaved IqbalAsim JilaniSehar ShakirAbul KalamS. WagehMDPI AGarticlenickel-copper-chromium oxidethin filmsXPS and XRDmethanol oxidationCrystallographyQD901-999ENCrystals, Vol 11, Iss 1398, p 1398 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nickel-copper-chromium oxide thin films XPS and XRD methanol oxidation Crystallography QD901-999
spellingShingle	nickel-copper-chromium oxide thin films XPS and XRD methanol oxidation Crystallography QD901-999 Rimsha Liaqat Muhammad Adil Mansoor Javed Iqbal Asim Jilani Sehar Shakir Abul Kalam S. Wageh Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol
description	Methanol electrochemical oxidation in a direct methanol fuel cell (DMFC) is considered to be an efficient pathway for generating renewable energy with low pollutant emissions. NiO−CuO and Ni<sub>0.95</sub>Cr<sub>0.05</sub>O<sub>2+δ</sub> thin films were synthesized using a simple dip-coating method and tested for the electro-oxidation of methanol. These synthesized electrocatalysts were characterized by X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and Raman spectroscopy. Different electrochemical techniques were used to investigate the catalytic activity of these prepared electrocatalysts for methanol oxidation, including linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). In the presence of 0.3 M methanol, the current densities of NiO−CuO and Ni<sub>0.95</sub>Cr<sub>0.05</sub>O<sub>2+δ</sub> thin films were found to be 12.2 mA·cm<sup>−2</sup> and 6.5 mA·cm<sup>−2</sup>, respectively. The enhanced catalytic activity of NiO−CuO and Ni<sub>0.95</sub>Cr<sub>0.05</sub>O<sub>2+δ</sub> thin films may be a result of the synergistic effect between different metal oxides. The Chronoamperometry (CA) results of the mixed metal oxide thin films confirmed their stability in basic media. Furthermore, the findings of electrochemical impedance spectroscopy (EIS) of mixed metal oxide thin films demonstrated a lower charge transfer resistance as compared to the pure NiO, CuO, and Cr<sub>2</sub>O<sub>3</sub> thin films.
format	article
author	Rimsha Liaqat Muhammad Adil Mansoor Javed Iqbal Asim Jilani Sehar Shakir Abul Kalam S. Wageh
author_facet	Rimsha Liaqat Muhammad Adil Mansoor Javed Iqbal Asim Jilani Sehar Shakir Abul Kalam S. Wageh
author_sort	Rimsha Liaqat
title	Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol
title_short	Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol
title_full	Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol
title_fullStr	Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol
title_full_unstemmed	Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol
title_sort	fabrication of metal (cu and cr) incorporated nickel oxide films for electrochemical oxidation of methanol
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1395f2aed6884f75a301a95d0b762575
work_keys_str_mv	AT rimshaliaqat fabricationofmetalcuandcrincorporatednickeloxidefilmsforelectrochemicaloxidationofmethanol AT muhammadadilmansoor fabricationofmetalcuandcrincorporatednickeloxidefilmsforelectrochemicaloxidationofmethanol AT javediqbal fabricationofmetalcuandcrincorporatednickeloxidefilmsforelectrochemicaloxidationofmethanol AT asimjilani fabricationofmetalcuandcrincorporatednickeloxidefilmsforelectrochemicaloxidationofmethanol AT seharshakir fabricationofmetalcuandcrincorporatednickeloxidefilmsforelectrochemicaloxidationofmethanol AT abulkalam fabricationofmetalcuandcrincorporatednickeloxidefilmsforelectrochemicaloxidationofmethanol AT swageh fabricationofmetalcuandcrincorporatednickeloxidefilmsforelectrochemicaloxidationofmethanol
_version_	1718412513567047680

Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol

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