Electrocatalytic Performance of MnMoO<sub>4</sub>-rGO Nano-Electrocatalyst for Methanol and Ethanol Oxidation
Today, finding low-cost electro-catalysts for methanol and ethanol oxidation with high performance and stability is one of the new research topics. A nanocatalyst based on metal oxides in the form of MnMoO<sub>4</sub> was synthesized by a hydrothermal method for methanol (MOR) and ethano...
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MDPI AG
2023-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/12/4613 |
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| author | Parisa Salarizadeh Sadegh Azizi Hossein Beydaghi Ahmad Bagheri Mohammad Bagher Askari |
| author_facet | Parisa Salarizadeh Sadegh Azizi Hossein Beydaghi Ahmad Bagheri Mohammad Bagher Askari |
| author_sort | Parisa Salarizadeh |
| collection | DOAJ |
| description | Today, finding low-cost electro-catalysts for methanol and ethanol oxidation with high performance and stability is one of the new research topics. A nanocatalyst based on metal oxides in the form of MnMoO<sub>4</sub> was synthesized by a hydrothermal method for methanol (MOR) and ethanol (EOR) oxidation reactions. Adding reduced graphene oxide (rGO) to the catalyst structure improved the electrocatalytic activity of MnMoO<sub>4</sub> for the oxidation processes. The crystal structure and morphology of the MnMoO<sub>4</sub> and MnMoO<sub>4</sub>-rGO nanocatalysts were investigated by physical analyses such as scanning electron microscopy and X-ray diffraction. Their abilities for MOR and EOR processes in an alkaline medium were evaluated by performing electrochemical tests such as cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. MnMoO<sub>4</sub>-rGO showed oxidation current densities of 60.59 and 25.39 mA/cm<sup>2</sup> and peak potentials of 0.62 and 0.67 V in MOR and EOR processes (at a scan rate of 40 mV/s), respectively. Moreover, stabilities of 91.7% in MOR and 88.6% in EOR processes were obtained from the chronoamperometry analysis within 6 h. All these features make MnMoO<sub>4</sub>-rGO a promising electrochemical catalyst for the oxidation of alcohols. |
| first_indexed | 2024-03-11T02:07:30Z |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T02:07:30Z |
| publishDate | 2023-06-01 |
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| series | Molecules |
| spelling | doaj.art-9239d1ab20ff4100841c920ea23057ab2023-11-18T11:48:00ZengMDPI AGMolecules1420-30492023-06-012812461310.3390/molecules28124613Electrocatalytic Performance of MnMoO<sub>4</sub>-rGO Nano-Electrocatalyst for Methanol and Ethanol OxidationParisa Salarizadeh0Sadegh Azizi1Hossein Beydaghi2Ahmad Bagheri3Mohammad Bagher Askari4High-Temperature Fuel Cell Research Department, Vali-e-Asr University of Rafsanjan, Rafsanjan P.O. Box 7718897111, IranDepartment of Physics, Faculty of Science, University of Guilan, Rasht P.O. Box 41335-1914, IranBeDimensional SpA, Lungotorrente Secca 30R, 16163 Genoa, ItalyGraphene Labs, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genoa, ItalyDepartment of Semiconductor, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman P.O. Box 76318-85356, IranToday, finding low-cost electro-catalysts for methanol and ethanol oxidation with high performance and stability is one of the new research topics. A nanocatalyst based on metal oxides in the form of MnMoO<sub>4</sub> was synthesized by a hydrothermal method for methanol (MOR) and ethanol (EOR) oxidation reactions. Adding reduced graphene oxide (rGO) to the catalyst structure improved the electrocatalytic activity of MnMoO<sub>4</sub> for the oxidation processes. The crystal structure and morphology of the MnMoO<sub>4</sub> and MnMoO<sub>4</sub>-rGO nanocatalysts were investigated by physical analyses such as scanning electron microscopy and X-ray diffraction. Their abilities for MOR and EOR processes in an alkaline medium were evaluated by performing electrochemical tests such as cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. MnMoO<sub>4</sub>-rGO showed oxidation current densities of 60.59 and 25.39 mA/cm<sup>2</sup> and peak potentials of 0.62 and 0.67 V in MOR and EOR processes (at a scan rate of 40 mV/s), respectively. Moreover, stabilities of 91.7% in MOR and 88.6% in EOR processes were obtained from the chronoamperometry analysis within 6 h. All these features make MnMoO<sub>4</sub>-rGO a promising electrochemical catalyst for the oxidation of alcohols.https://www.mdpi.com/1420-3049/28/12/4613MnMoO<sub>4</sub>rGOmethanol oxidation reactionethanol oxidation reaction |
| spellingShingle | Parisa Salarizadeh Sadegh Azizi Hossein Beydaghi Ahmad Bagheri Mohammad Bagher Askari Electrocatalytic Performance of MnMoO<sub>4</sub>-rGO Nano-Electrocatalyst for Methanol and Ethanol Oxidation Molecules MnMoO<sub>4</sub> rGO methanol oxidation reaction ethanol oxidation reaction |
| title | Electrocatalytic Performance of MnMoO<sub>4</sub>-rGO Nano-Electrocatalyst for Methanol and Ethanol Oxidation |
| title_full | Electrocatalytic Performance of MnMoO<sub>4</sub>-rGO Nano-Electrocatalyst for Methanol and Ethanol Oxidation |
| title_fullStr | Electrocatalytic Performance of MnMoO<sub>4</sub>-rGO Nano-Electrocatalyst for Methanol and Ethanol Oxidation |
| title_full_unstemmed | Electrocatalytic Performance of MnMoO<sub>4</sub>-rGO Nano-Electrocatalyst for Methanol and Ethanol Oxidation |
| title_short | Electrocatalytic Performance of MnMoO<sub>4</sub>-rGO Nano-Electrocatalyst for Methanol and Ethanol Oxidation |
| title_sort | electrocatalytic performance of mnmoo sub 4 sub rgo nano electrocatalyst for methanol and ethanol oxidation |
| topic | MnMoO<sub>4</sub> rGO methanol oxidation reaction ethanol oxidation reaction |
| url | https://www.mdpi.com/1420-3049/28/12/4613 |
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