Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave Irradiation
This work presents an OsRu-based electrocatalyst synthesis, by a rapid and efficient method through microwave irradiation. The outstanding electrocatalyst shows a dual catalytic activity, demonstrating both: hydrogen oxidation and oxygen reduction reactions. The material is structural and morphologi...
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2021-09-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/19/5692 |
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| author | Ángela Selva-Ochoa Javier Su-Gallegos Pathiyammattom Joseph Sebastian Lorena Magallón-Cacho Edgar Borja-Arco |
| author_facet | Ángela Selva-Ochoa Javier Su-Gallegos Pathiyammattom Joseph Sebastian Lorena Magallón-Cacho Edgar Borja-Arco |
| author_sort | Ángela Selva-Ochoa |
| collection | DOAJ |
| description | This work presents an OsRu-based electrocatalyst synthesis, by a rapid and efficient method through microwave irradiation. The outstanding electrocatalyst shows a dual catalytic activity, demonstrating both: hydrogen oxidation and oxygen reduction reactions. The material is structural and morphologically characterized by FT-IR, X-ray diffraction, EDS, and SEM, indicating nanoparticulated Os and Ru metallic phases with a crystallite size of ∼6 nm, calculated by the Scherrer equation. The metal nanoparticles are apparently deposited on a carbonaceous sponge-like morphology structure. Its electrochemical characterization is performed in 0.5 M H<sub>2</sub>SO<sub>4</sub> by the rotating disk electrode technique, employing cyclic and linear sweep voltammetry. Two different ink treatments have been studied to improve the obtained polarization curves. The material is also tested in the presence of methanol for the oxygen reduction reaction, showing an important resistance to this contaminant, making it viable for its use in direct methanol fuel cells (DMFCs) as a cathode and in polymer electrolyte fuel cells (PEMFCs) as an anode as much as a cathode. |
| first_indexed | 2024-03-10T06:56:21Z |
| format | Article |
| id | doaj.art-cf834932b4374aa5a82ab85b578a045d |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T06:56:21Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-cf834932b4374aa5a82ab85b578a045d2023-11-22T16:25:38ZengMDPI AGMaterials1996-19442021-09-011419569210.3390/ma14195692Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave IrradiationÁngela Selva-Ochoa0Javier Su-Gallegos1Pathiyammattom Joseph Sebastian2Lorena Magallón-Cacho3Edgar Borja-Arco4Department of Theoretical Physics and Chemistry, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City 04510, MexicoDepartment of Theoretical Physics and Chemistry, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City 04510, MexicoRenewable Energy Institute, National Autonomous University of Mexico, Cuernavaca 62580, MexicoCátedras-CONACYT, National Institute of Electricity and Clean Energies, Cuernavaca 62490, MexicoDepartment of Theoretical Physics and Chemistry, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City 04510, MexicoThis work presents an OsRu-based electrocatalyst synthesis, by a rapid and efficient method through microwave irradiation. The outstanding electrocatalyst shows a dual catalytic activity, demonstrating both: hydrogen oxidation and oxygen reduction reactions. The material is structural and morphologically characterized by FT-IR, X-ray diffraction, EDS, and SEM, indicating nanoparticulated Os and Ru metallic phases with a crystallite size of ∼6 nm, calculated by the Scherrer equation. The metal nanoparticles are apparently deposited on a carbonaceous sponge-like morphology structure. Its electrochemical characterization is performed in 0.5 M H<sub>2</sub>SO<sub>4</sub> by the rotating disk electrode technique, employing cyclic and linear sweep voltammetry. Two different ink treatments have been studied to improve the obtained polarization curves. The material is also tested in the presence of methanol for the oxygen reduction reaction, showing an important resistance to this contaminant, making it viable for its use in direct methanol fuel cells (DMFCs) as a cathode and in polymer electrolyte fuel cells (PEMFCs) as an anode as much as a cathode.https://www.mdpi.com/1996-1944/14/19/5692microwave synthesisbimetallic electrocatalystsoxygen reductionhydrogen oxidation |
| spellingShingle | Ángela Selva-Ochoa Javier Su-Gallegos Pathiyammattom Joseph Sebastian Lorena Magallón-Cacho Edgar Borja-Arco Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave Irradiation Materials microwave synthesis bimetallic electrocatalysts oxygen reduction hydrogen oxidation |
| title | Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave Irradiation |
| title_full | Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave Irradiation |
| title_fullStr | Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave Irradiation |
| title_full_unstemmed | Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave Irradiation |
| title_short | Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave Irradiation |
| title_sort | hydrogen oxidation and oxygen reduction reactions on an osru based electrocatalyst synthesized by microwave irradiation |
| topic | microwave synthesis bimetallic electrocatalysts oxygen reduction hydrogen oxidation |
| url | https://www.mdpi.com/1996-1944/14/19/5692 |
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