Liquid Metal Electrocatalyst with Ultralow Pt Loading for Ethanol Oxidation
Developing efficient and durable electrocatalysts for ethanol electro‐oxidation is crucial for enabling the application of direct ethanol fuel cell technology. Herein, it is demonstrated that Pt–Ga liquid metal‐based nanodroplets can serve as an efficient electrocatalyst to drive ethanol oxidation....
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-01-01
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| Series: | Small Science |
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| Online Access: | https://doi.org/10.1002/smsc.202400370 |
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| author | Muhammad Hamza Nazir Tu C. Le Imtisal Zahid Karma Zuraiqi Mew P. Aukarasereenont Caiden J. Parker Pierre H. A. Vaillant Fahad Jabbar Chung Kim Nguyen Mehmood Irfan Mariam Ameen Michelle J. S. Spencer Andrew J. Christofferson Salvy P. Russo Ken Chiang Nastaran Meftahi Torben Daeneke Dan Yang |
| author_facet | Muhammad Hamza Nazir Tu C. Le Imtisal Zahid Karma Zuraiqi Mew P. Aukarasereenont Caiden J. Parker Pierre H. A. Vaillant Fahad Jabbar Chung Kim Nguyen Mehmood Irfan Mariam Ameen Michelle J. S. Spencer Andrew J. Christofferson Salvy P. Russo Ken Chiang Nastaran Meftahi Torben Daeneke Dan Yang |
| author_sort | Muhammad Hamza Nazir |
| collection | DOAJ |
| description | Developing efficient and durable electrocatalysts for ethanol electro‐oxidation is crucial for enabling the application of direct ethanol fuel cell technology. Herein, it is demonstrated that Pt–Ga liquid metal‐based nanodroplets can serve as an efficient electrocatalyst to drive ethanol oxidation. The mass activity of Pt is significantly improved by alloying with liquid gallium. Guided by machine learning neural networks, a low‐concentration alkaline electrolyte is specifically formulated to allow electrodes with ultralow Pt loading to demonstrate remarkable activity toward ethanol oxidation with a mass activity as high as 13.47 A mg−1Pt, which is more than 14 times higher than that of commercial Pt/C electrocatalysts (i.e., 0.76 A mg−1Pt). Computational studies reveal that the superior activity is associated with the presence of Ga oxides adjacent to Pt on the catalyst surface which leads to energetically favorable pathways for the oxidation process. The findings reveal untapped opportunities in the realm of liquid metal catalysis and hold great promise for the future development of high‐performance alcohol fuel cells. |
| format | Article |
| id | doaj-art-7f51e374b6c4406cbc1a09c928a2d990 |
| institution | Kabale University |
| issn | 2688-4046 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Science |
| spelling | doaj-art-7f51e374b6c4406cbc1a09c928a2d9902024-12-30T12:24:30ZengWiley-VCHSmall Science2688-40462025-01-0151n/an/a10.1002/smsc.202400370Liquid Metal Electrocatalyst with Ultralow Pt Loading for Ethanol OxidationMuhammad Hamza Nazir0Tu C. Le1Imtisal Zahid2Karma Zuraiqi3Mew P. Aukarasereenont4Caiden J. Parker5Pierre H. A. Vaillant6Fahad Jabbar7Chung Kim Nguyen8Mehmood Irfan9Mariam Ameen10Michelle J. S. Spencer11Andrew J. Christofferson12Salvy P. Russo13Ken Chiang14Nastaran Meftahi15Torben Daeneke16Dan Yang17Department of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Manufacturing Materials and Mechatronics School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaSchool of Science RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaSchool of Science RMIT University Melbourne VIC 3001 AustraliaSchool of Science RMIT University Melbourne VIC 3001 AustraliaSchool of Science RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaSchool of Science RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDepartment of Chemical and Environmental Engineering School of Engineering RMIT University Melbourne VIC 3001 AustraliaDeveloping efficient and durable electrocatalysts for ethanol electro‐oxidation is crucial for enabling the application of direct ethanol fuel cell technology. Herein, it is demonstrated that Pt–Ga liquid metal‐based nanodroplets can serve as an efficient electrocatalyst to drive ethanol oxidation. The mass activity of Pt is significantly improved by alloying with liquid gallium. Guided by machine learning neural networks, a low‐concentration alkaline electrolyte is specifically formulated to allow electrodes with ultralow Pt loading to demonstrate remarkable activity toward ethanol oxidation with a mass activity as high as 13.47 A mg−1Pt, which is more than 14 times higher than that of commercial Pt/C electrocatalysts (i.e., 0.76 A mg−1Pt). Computational studies reveal that the superior activity is associated with the presence of Ga oxides adjacent to Pt on the catalyst surface which leads to energetically favorable pathways for the oxidation process. The findings reveal untapped opportunities in the realm of liquid metal catalysis and hold great promise for the future development of high‐performance alcohol fuel cells.https://doi.org/10.1002/smsc.202400370direct ethanol fuel cellselectrolyte optimizationsethanol oxidationsliquid metal catalystsmachine learning |
| spellingShingle | Muhammad Hamza Nazir Tu C. Le Imtisal Zahid Karma Zuraiqi Mew P. Aukarasereenont Caiden J. Parker Pierre H. A. Vaillant Fahad Jabbar Chung Kim Nguyen Mehmood Irfan Mariam Ameen Michelle J. S. Spencer Andrew J. Christofferson Salvy P. Russo Ken Chiang Nastaran Meftahi Torben Daeneke Dan Yang Liquid Metal Electrocatalyst with Ultralow Pt Loading for Ethanol Oxidation Small Science direct ethanol fuel cells electrolyte optimizations ethanol oxidations liquid metal catalysts machine learning |
| title | Liquid Metal Electrocatalyst with Ultralow Pt Loading for Ethanol Oxidation |
| title_full | Liquid Metal Electrocatalyst with Ultralow Pt Loading for Ethanol Oxidation |
| title_fullStr | Liquid Metal Electrocatalyst with Ultralow Pt Loading for Ethanol Oxidation |
| title_full_unstemmed | Liquid Metal Electrocatalyst with Ultralow Pt Loading for Ethanol Oxidation |
| title_short | Liquid Metal Electrocatalyst with Ultralow Pt Loading for Ethanol Oxidation |
| title_sort | liquid metal electrocatalyst with ultralow pt loading for ethanol oxidation |
| topic | direct ethanol fuel cells electrolyte optimizations ethanol oxidations liquid metal catalysts machine learning |
| url | https://doi.org/10.1002/smsc.202400370 |
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