Details
| Original language | English |
|---|---|
| Article number | 1074 |
| Journal | CATALYSTS |
| Volume | 13 |
| Issue number | 7 |
| Publication status | Published - 6 Jul 2023 |
Abstract
Cryogels from noble metal NPs have proven to be highly efficient catalysts due to their high specific surface area which increases the mass transfer channels and catalytic active sites. By using metal oxides as co-catalysts, the costs of the material can be significantly reduced, while the catalytic activity can remain the same or even improve due to synergetic effects. In this work, we synthesize different cryogel thin films supported on modified ITO substrates from Pt, Pd nanoparticles (NPs), and mixtures of these noble metals with γ-Fe2O3 NPs in a very low concentration (1 wt% of the noble metal). Structural and elemental analysis of the samples are performed, along with the measurement and analysis of their catalytic activity. The electrocatalytic activity of the cryogels towards ethanol oxidation reaction (EOR) in alkaline media was evaluated by means of cyclic voltammetry. By mixing γ-Fe2O3 NPs with Pt or Pd NPs in the cryogel structure, we observe increased tolerance against poisonous surface intermediates produced during the EOR. Moreover, we observe an increase in the catalytic activity towards EOR in the case of the 1 wt% Pd/γ-Fe2O3 cryogel, making them promising materials for the development of direct ethanol fuel cells.
Keywords
- cryogels, cyclic voltammetry, electrocatalysis, ethanol oxidation reaction, metal oxide, nanoparticles, Pd, Pt
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Environmental Science(all)
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: CATALYSTS, Vol. 13, No. 7, 1074, 06.07.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Cryogels from Pt/γ-Fe2O3 and Pd/γ-Fe2O3 NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction
AU - Borg, Hadir
AU - Morales, Irene
AU - Kranz, Daniel
AU - Bigall, Nadja C.
AU - Dorfs, Dirk
N1 - Funding Information: The authors are grateful for financial support from DFG (INST 187/782-1 and INST 187/782-2, as well as BI 1708/4-3). The work has additionally been funded by Germany’s excellence strategy within the cluster of excellence PhoenixD (EXC 2122, project ID 390833453). D.K. would like to thank the Konrad-Adenauer-Stiftung (KAS) for the financial support.
PY - 2023/7/6
Y1 - 2023/7/6
N2 - Cryogels from noble metal NPs have proven to be highly efficient catalysts due to their high specific surface area which increases the mass transfer channels and catalytic active sites. By using metal oxides as co-catalysts, the costs of the material can be significantly reduced, while the catalytic activity can remain the same or even improve due to synergetic effects. In this work, we synthesize different cryogel thin films supported on modified ITO substrates from Pt, Pd nanoparticles (NPs), and mixtures of these noble metals with γ-Fe2O3 NPs in a very low concentration (1 wt% of the noble metal). Structural and elemental analysis of the samples are performed, along with the measurement and analysis of their catalytic activity. The electrocatalytic activity of the cryogels towards ethanol oxidation reaction (EOR) in alkaline media was evaluated by means of cyclic voltammetry. By mixing γ-Fe2O3 NPs with Pt or Pd NPs in the cryogel structure, we observe increased tolerance against poisonous surface intermediates produced during the EOR. Moreover, we observe an increase in the catalytic activity towards EOR in the case of the 1 wt% Pd/γ-Fe2O3 cryogel, making them promising materials for the development of direct ethanol fuel cells.
AB - Cryogels from noble metal NPs have proven to be highly efficient catalysts due to their high specific surface area which increases the mass transfer channels and catalytic active sites. By using metal oxides as co-catalysts, the costs of the material can be significantly reduced, while the catalytic activity can remain the same or even improve due to synergetic effects. In this work, we synthesize different cryogel thin films supported on modified ITO substrates from Pt, Pd nanoparticles (NPs), and mixtures of these noble metals with γ-Fe2O3 NPs in a very low concentration (1 wt% of the noble metal). Structural and elemental analysis of the samples are performed, along with the measurement and analysis of their catalytic activity. The electrocatalytic activity of the cryogels towards ethanol oxidation reaction (EOR) in alkaline media was evaluated by means of cyclic voltammetry. By mixing γ-Fe2O3 NPs with Pt or Pd NPs in the cryogel structure, we observe increased tolerance against poisonous surface intermediates produced during the EOR. Moreover, we observe an increase in the catalytic activity towards EOR in the case of the 1 wt% Pd/γ-Fe2O3 cryogel, making them promising materials for the development of direct ethanol fuel cells.
KW - cryogels
KW - cyclic voltammetry
KW - electrocatalysis
KW - ethanol oxidation reaction
KW - metal oxide
KW - nanoparticles
KW - Pd
KW - Pt
UR - http://www.scopus.com/inward/record.url?scp=85166279031&partnerID=8YFLogxK
U2 - 10.3390/catal13071074
DO - 10.3390/catal13071074
M3 - Article
AN - SCOPUS:85166279031
VL - 13
JO - CATALYSTS
JF - CATALYSTS
SN - 2073-4344
IS - 7
M1 - 1074
ER -