Understanding the effect of MXene in a TMO/MXene hybrid catalyst for the oxygen evolution reaction
Abstract Very recently, it has been reported that mixed transition metal oxide (TMO)/MXene catalysts show improved performance over TMO only catalysts for the oxygen evolution reaction (OER). However, the reasoning behind this observation is unknown. In this work mixed Co(OH)2/Ti3C2Tx were prepared...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-03-01
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| Series: | npj 2D Materials and Applications |
| Online Access: | https://doi.org/10.1038/s41699-023-00377-1 |
| _version_ | 1797864581866979328 |
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| author | Daire Tyndall Lee Gannon Lucia Hughes Julian Carolan Sergio Pinilla Sonia Jaśkaniec Dahnan Spurling Oskar Ronan Cormac McGuinness Niall McEvoy Valeria Nicolosi Michelle Philippa Browne |
| author_facet | Daire Tyndall Lee Gannon Lucia Hughes Julian Carolan Sergio Pinilla Sonia Jaśkaniec Dahnan Spurling Oskar Ronan Cormac McGuinness Niall McEvoy Valeria Nicolosi Michelle Philippa Browne |
| author_sort | Daire Tyndall |
| collection | DOAJ |
| description | Abstract Very recently, it has been reported that mixed transition metal oxide (TMO)/MXene catalysts show improved performance over TMO only catalysts for the oxygen evolution reaction (OER). However, the reasoning behind this observation is unknown. In this work mixed Co(OH)2/Ti3C2Tx were prepared and characterized for the OER using ex situ and operando spectroscopy techniques in order to initiate the understanding of why mixed TMO/MXene materials show better performances compared to TMO only catalysts. This work shows that the improved electrocatalysis for the composite material compared to the TMO only catalyst is due to the presence of higher Co oxide oxidation states at lower OER overpotentials for the mixed TMO/MXene catalysts. Furthermore, the presence of the MXene allows for a more mechanically robust film during OER, making the film more stable. Finally, our results show that small amounts of MXene are more advantageous for the OER during long-term stability measurements, which is linked to the formation of TiO2. The sensitivity of MXene oxidation ultimately limits TMO/MXene composites under alkaline OER conditions, meaning mass fractions must be carefully considered when designing such a catalyst to minimize the residual TiO2 formed during its lifetime. |
| first_indexed | 2024-04-09T22:54:12Z |
| format | Article |
| id | doaj.art-b0166dccde354b1ba392f2358f94c883 |
| institution | Directory Open Access Journal |
| issn | 2397-7132 |
| language | English |
| last_indexed | 2024-04-09T22:54:12Z |
| publishDate | 2023-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj 2D Materials and Applications |
| spelling | doaj.art-b0166dccde354b1ba392f2358f94c8832023-03-22T11:22:43ZengNature Portfolionpj 2D Materials and Applications2397-71322023-03-017111110.1038/s41699-023-00377-1Understanding the effect of MXene in a TMO/MXene hybrid catalyst for the oxygen evolution reactionDaire Tyndall0Lee Gannon1Lucia Hughes2Julian Carolan3Sergio Pinilla4Sonia Jaśkaniec5Dahnan Spurling6Oskar Ronan7Cormac McGuinness8Niall McEvoy9Valeria Nicolosi10Michelle Philippa Browne11Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College DublinAbstract Very recently, it has been reported that mixed transition metal oxide (TMO)/MXene catalysts show improved performance over TMO only catalysts for the oxygen evolution reaction (OER). However, the reasoning behind this observation is unknown. In this work mixed Co(OH)2/Ti3C2Tx were prepared and characterized for the OER using ex situ and operando spectroscopy techniques in order to initiate the understanding of why mixed TMO/MXene materials show better performances compared to TMO only catalysts. This work shows that the improved electrocatalysis for the composite material compared to the TMO only catalyst is due to the presence of higher Co oxide oxidation states at lower OER overpotentials for the mixed TMO/MXene catalysts. Furthermore, the presence of the MXene allows for a more mechanically robust film during OER, making the film more stable. Finally, our results show that small amounts of MXene are more advantageous for the OER during long-term stability measurements, which is linked to the formation of TiO2. The sensitivity of MXene oxidation ultimately limits TMO/MXene composites under alkaline OER conditions, meaning mass fractions must be carefully considered when designing such a catalyst to minimize the residual TiO2 formed during its lifetime.https://doi.org/10.1038/s41699-023-00377-1 |
| spellingShingle | Daire Tyndall Lee Gannon Lucia Hughes Julian Carolan Sergio Pinilla Sonia Jaśkaniec Dahnan Spurling Oskar Ronan Cormac McGuinness Niall McEvoy Valeria Nicolosi Michelle Philippa Browne Understanding the effect of MXene in a TMO/MXene hybrid catalyst for the oxygen evolution reaction npj 2D Materials and Applications |
| title | Understanding the effect of MXene in a TMO/MXene hybrid catalyst for the oxygen evolution reaction |
| title_full | Understanding the effect of MXene in a TMO/MXene hybrid catalyst for the oxygen evolution reaction |
| title_fullStr | Understanding the effect of MXene in a TMO/MXene hybrid catalyst for the oxygen evolution reaction |
| title_full_unstemmed | Understanding the effect of MXene in a TMO/MXene hybrid catalyst for the oxygen evolution reaction |
| title_short | Understanding the effect of MXene in a TMO/MXene hybrid catalyst for the oxygen evolution reaction |
| title_sort | understanding the effect of mxene in a tmo mxene hybrid catalyst for the oxygen evolution reaction |
| url | https://doi.org/10.1038/s41699-023-00377-1 |
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