Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro‐Oxidation
Abstract Cryogels made of colloidal nanoparticles (NPs) are a unique material class with a high specific surface area and tunable microstructure. Flash freezing of the nanoparticle building blocks and subsequent freeze‐drying of the gels, the so‐called cryoaerogelation, allows significant control ov...
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Wiley-VCH
2025-02-01
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| Series: | ChemElectroChem |
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| Online Access: | https://doi.org/10.1002/celc.202400552 |
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| author | Hadir Borg Dániel Zámbó Patrick Bessel Daniel Kranz Marina Rosebrock Franziska Lübkemann‐Warwas Nadja C. Bigall Dirk Dorfs |
| author_facet | Hadir Borg Dániel Zámbó Patrick Bessel Daniel Kranz Marina Rosebrock Franziska Lübkemann‐Warwas Nadja C. Bigall Dirk Dorfs |
| author_sort | Hadir Borg |
| collection | DOAJ |
| description | Abstract Cryogels made of colloidal nanoparticles (NPs) are a unique material class with a high specific surface area and tunable microstructure. Flash freezing of the nanoparticle building blocks and subsequent freeze‐drying of the gels, the so‐called cryoaerogelation, allows significant control over morphology, stability and improved electrocatalytic performance. In the present work, the first bimetallic Pt/Pd cryogel films of mixed Pt and Pd NPs are prepared in different molar ratios. High‐resolution microscopic and spectroscopic characterization techniques are applied to confirm the final Pt : Pd ratio besides the distribution of nanoparticles throughout the cryogel structure. Scanning electron microscopy (SEM) images of the different prepared cryogel films show a cellular to dendritic superstructure regardless of the Pt and/or Pd composition in a highly reproducible manner. Elemental analysis shows homogenous distribution of Pt and Pd NPs at the microscale for all samples. Since the prepared materials are of utmost importance for catalytic applications, their electrocatalytic activity toward ethanol oxidation reaction (EOR) is investigated. Fine‐tuning the concentration of the building blocks, the structure, thickness, and composition of the porous coatings enables high electrocatalytic activity to be achieved. Cryogel thin films with an atomic ratio of 1 : 4 Pt : Pd have the highest electrocatalytic activity for EOR. |
| format | Article |
| id | doaj-art-98758018fe6d4763b581b4e1e95da0a2 |
| institution | Kabale University |
| issn | 2196-0216 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley-VCH |
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| series | ChemElectroChem |
| spelling | doaj-art-98758018fe6d4763b581b4e1e95da0a22025-02-03T10:00:37ZengWiley-VCHChemElectroChem2196-02162025-02-01123n/an/a10.1002/celc.202400552Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro‐OxidationHadir Borg0Dániel Zámbó1Patrick Bessel2Daniel Kranz3Marina Rosebrock4Franziska Lübkemann‐Warwas5Nadja C. Bigall6Dirk Dorfs7Institute of Physical Chemistry and Electrochemistry Leibniz University Hannover 30167 Hannover GermanyInstitute of Technical Physics and Materials Science HUN-REN Centre for Energy Research Budapest 1121 HungaryInstitute of Physical Chemistry and Electrochemistry Leibniz University Hannover 30167 Hannover GermanyInstitute of Physical Chemistry and Electrochemistry Leibniz University Hannover 30167 Hannover GermanyInstitute of Physical Chemistry and Electrochemistry Leibniz University Hannover 30167 Hannover GermanyInstitute of Physical Chemistry and Electrochemistry Leibniz University Hannover 30167 Hannover GermanyInstitute of Physical Chemistry and Electrochemistry Leibniz University Hannover 30167 Hannover GermanyInstitute of Physical Chemistry and Electrochemistry Leibniz University Hannover 30167 Hannover GermanyAbstract Cryogels made of colloidal nanoparticles (NPs) are a unique material class with a high specific surface area and tunable microstructure. Flash freezing of the nanoparticle building blocks and subsequent freeze‐drying of the gels, the so‐called cryoaerogelation, allows significant control over morphology, stability and improved electrocatalytic performance. In the present work, the first bimetallic Pt/Pd cryogel films of mixed Pt and Pd NPs are prepared in different molar ratios. High‐resolution microscopic and spectroscopic characterization techniques are applied to confirm the final Pt : Pd ratio besides the distribution of nanoparticles throughout the cryogel structure. Scanning electron microscopy (SEM) images of the different prepared cryogel films show a cellular to dendritic superstructure regardless of the Pt and/or Pd composition in a highly reproducible manner. Elemental analysis shows homogenous distribution of Pt and Pd NPs at the microscale for all samples. Since the prepared materials are of utmost importance for catalytic applications, their electrocatalytic activity toward ethanol oxidation reaction (EOR) is investigated. Fine‐tuning the concentration of the building blocks, the structure, thickness, and composition of the porous coatings enables high electrocatalytic activity to be achieved. Cryogel thin films with an atomic ratio of 1 : 4 Pt : Pd have the highest electrocatalytic activity for EOR.https://doi.org/10.1002/celc.202400552cryogelsplatinum nanoparticlespalladium nanoparticleselectrocatalystsethanol oxidation |
| spellingShingle | Hadir Borg Dániel Zámbó Patrick Bessel Daniel Kranz Marina Rosebrock Franziska Lübkemann‐Warwas Nadja C. Bigall Dirk Dorfs Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro‐Oxidation ChemElectroChem cryogels platinum nanoparticles palladium nanoparticles electrocatalysts ethanol oxidation |
| title | Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro‐Oxidation |
| title_full | Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro‐Oxidation |
| title_fullStr | Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro‐Oxidation |
| title_full_unstemmed | Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro‐Oxidation |
| title_short | Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro‐Oxidation |
| title_sort | tailoring bimetallic pt pd cryogels for efficient ethanol electro oxidation |
| topic | cryogels platinum nanoparticles palladium nanoparticles electrocatalysts ethanol oxidation |
| url | https://doi.org/10.1002/celc.202400552 |
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