Details
| Original language | English |
|---|---|
| Article number | e202400552 |
| Number of pages | 14 |
| Journal | CHEMELECTROCHEM |
| Volume | 12 |
| Issue number | 3 |
| Publication status | Published - 3 Feb 2025 |
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.
Keywords
- cryogels, electrocatalysts, ethanol oxidation, palladium nanoparticles, platinum nanoparticles
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- Electrochemistry
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: CHEMELECTROCHEM, Vol. 12, No. 3, e202400552, 03.02.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro-Oxidation
AU - Borg, Hadir
AU - Zámbó, Dániel
AU - Bessel, Patrick
AU - Kranz, Daniel
AU - Rosebrock, Marina
AU - Lübkemann-Warwas, Franziska
AU - Bigall, Nadja C.
AU - Dorfs, Dirk
N1 - Publisher Copyright: © 2024 The Authors. ChemElectroChem published by Wiley-VCH GmbH.
PY - 2025/2/3
Y1 - 2025/2/3
N2 - 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.
AB - 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.
KW - cryogels
KW - electrocatalysts
KW - ethanol oxidation
KW - palladium nanoparticles
KW - platinum nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85211468563&partnerID=8YFLogxK
U2 - 10.1002/celc.202400552
DO - 10.1002/celc.202400552
M3 - Article
AN - SCOPUS:85211468563
VL - 12
JO - CHEMELECTROCHEM
JF - CHEMELECTROCHEM
SN - 2196-0216
IS - 3
M1 - e202400552
ER -