Microwave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device
Abstract Mn3O4 nanograins incorporated into reduced graphene oxide as a nanocomposite electrocatalyst have been synthesized via one-step, facile, and single-pot microwave-assisted hydrothermal technique. The nanocomposites were employed as cathode material of fuel cells for oxygen reduction reaction...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-23622-x |
| _version_ | 1798018319152840704 |
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| author | Mehmood Shahid Thilina Rajeendre Katugampalage Mohammad Khalid Waqar Ahmed Chariya Kaewsaneha Paiboon Sreearunothai Pakorn Opaprakasit |
| author_facet | Mehmood Shahid Thilina Rajeendre Katugampalage Mohammad Khalid Waqar Ahmed Chariya Kaewsaneha Paiboon Sreearunothai Pakorn Opaprakasit |
| author_sort | Mehmood Shahid |
| collection | DOAJ |
| description | Abstract Mn3O4 nanograins incorporated into reduced graphene oxide as a nanocomposite electrocatalyst have been synthesized via one-step, facile, and single-pot microwave-assisted hydrothermal technique. The nanocomposites were employed as cathode material of fuel cells for oxygen reduction reaction (ORR). The synthesized product was thoroughly studied by using important characterization, such as XRD for the structure analysis and FESEM and TEM analyses to assess the morphological structures of the material. Raman spectra were employed to study the GO, rGO bands and formation of Mn3O4@rGO nanocomposite. FTIR and UV–Vis spectroscopic analysis were used to verify the effective synthesis of the desired electrocatalyst. The Mn3O4@rGO-10% nanocomposite with 10 wt% of graphene oxide was used to alter the shiny surface of the working electrode and applied for ORR in O2 purged 0.5 M KOH electrolyte solution. The Mn3O4@rGO-10% nanocomposite electrocatalyst exhibited outstanding performance with an improved current of − 0.738 mA/cm2 and shifted overpotential values of − 0.345 V when compared to other controlled electrodes, including the conventionally used Pt/C catalyst generally used for ORR activity. The tolerance of Mn3O4@rGO-10% nanocomposite was tested by injecting a higher concentration of methanol, i.e., 0.5 M, and found unsusceptible by methanol crossover. The stability test of the synthesized electrocatalyst after 3000 s was also considered, and it demonstrated excellent current retention of 98% compared to commercially available Pt/C electrocatalyst. The synthesized nanocomposite material could be regarded as an effective and Pt-free electrocatalyst for practical ORR that meets the requirement of low cost, facile fabrication, and adequate stability. |
| first_indexed | 2024-04-11T16:22:10Z |
| format | Article |
| id | doaj.art-63b27c85808c4a3f9d40c1dff4492203 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T16:22:10Z |
| publishDate | 2022-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-63b27c85808c4a3f9d40c1dff44922032022-12-22T04:14:17ZengNature PortfolioScientific Reports2045-23222022-11-0112111610.1038/s41598-022-23622-xMicrowave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy deviceMehmood Shahid0Thilina Rajeendre Katugampalage1Mohammad Khalid2Waqar Ahmed3Chariya Kaewsaneha4Paiboon Sreearunothai5Pakorn Opaprakasit6School of Integrated Science and Innovation (ISI), Sirindhorn International Institute of Technology (SIIT), Thammasat UniversitySchool of Integrated Science and Innovation (ISI), Sirindhorn International Institute of Technology (SIIT), Thammasat UniversityGraphene and Advanced 2D Materials Research Group (GAMRG), School of Engineering and Technology, Sunway UniversityMalaysia – Japan International Institute of Technology (MJIIT), Universiti Teknologi MalaysiaSchool of Integrated Science and Innovation (ISI), Sirindhorn International Institute of Technology (SIIT), Thammasat UniversitySchool of Integrated Science and Innovation (ISI), Sirindhorn International Institute of Technology (SIIT), Thammasat UniversitySchool of Integrated Science and Innovation (ISI), Sirindhorn International Institute of Technology (SIIT), Thammasat UniversityAbstract Mn3O4 nanograins incorporated into reduced graphene oxide as a nanocomposite electrocatalyst have been synthesized via one-step, facile, and single-pot microwave-assisted hydrothermal technique. The nanocomposites were employed as cathode material of fuel cells for oxygen reduction reaction (ORR). The synthesized product was thoroughly studied by using important characterization, such as XRD for the structure analysis and FESEM and TEM analyses to assess the morphological structures of the material. Raman spectra were employed to study the GO, rGO bands and formation of Mn3O4@rGO nanocomposite. FTIR and UV–Vis spectroscopic analysis were used to verify the effective synthesis of the desired electrocatalyst. The Mn3O4@rGO-10% nanocomposite with 10 wt% of graphene oxide was used to alter the shiny surface of the working electrode and applied for ORR in O2 purged 0.5 M KOH electrolyte solution. The Mn3O4@rGO-10% nanocomposite electrocatalyst exhibited outstanding performance with an improved current of − 0.738 mA/cm2 and shifted overpotential values of − 0.345 V when compared to other controlled electrodes, including the conventionally used Pt/C catalyst generally used for ORR activity. The tolerance of Mn3O4@rGO-10% nanocomposite was tested by injecting a higher concentration of methanol, i.e., 0.5 M, and found unsusceptible by methanol crossover. The stability test of the synthesized electrocatalyst after 3000 s was also considered, and it demonstrated excellent current retention of 98% compared to commercially available Pt/C electrocatalyst. The synthesized nanocomposite material could be regarded as an effective and Pt-free electrocatalyst for practical ORR that meets the requirement of low cost, facile fabrication, and adequate stability.https://doi.org/10.1038/s41598-022-23622-x |
| spellingShingle | Mehmood Shahid Thilina Rajeendre Katugampalage Mohammad Khalid Waqar Ahmed Chariya Kaewsaneha Paiboon Sreearunothai Pakorn Opaprakasit Microwave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device Scientific Reports |
| title | Microwave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device |
| title_full | Microwave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device |
| title_fullStr | Microwave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device |
| title_full_unstemmed | Microwave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device |
| title_short | Microwave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device |
| title_sort | microwave assisted synthesis of mn3o4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device |
| url | https://doi.org/10.1038/s41598-022-23622-x |
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