Cryogels from Pt/γ-Fe<sub>2</sub>O<sub>3</sub> and Pd/γ-Fe<sub>2</sub>O<sub>3</sub> NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction
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...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/13/7/1074 |
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| author | Hadir Borg Irene Morales Daniel Kranz Nadja C. Bigall Dirk Dorfs |
| author_facet | Hadir Borg Irene Morales Daniel Kranz Nadja C. Bigall Dirk Dorfs |
| author_sort | Hadir Borg |
| collection | DOAJ |
| description | 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-Fe<sub>2</sub>O<sub>3</sub> 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-Fe<sub>2</sub>O<sub>3</sub> 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-Fe<sub>2</sub>O<sub>3</sub> cryogel, making them promising materials for the development of direct ethanol fuel cells. |
| first_indexed | 2024-03-11T01:12:29Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T01:12:29Z |
| publishDate | 2023-07-01 |
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| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-454fddc20d5947c99ca0bf2330f37f452023-11-18T18:44:20ZengMDPI AGCatalysts2073-43442023-07-01137107410.3390/catal13071074Cryogels from Pt/γ-Fe<sub>2</sub>O<sub>3</sub> and Pd/γ-Fe<sub>2</sub>O<sub>3</sub> NPs as Promising Electrocatalysts for Ethanol Oxidation ReactionHadir Borg0Irene Morales1Daniel Kranz2Nadja C. Bigall3Dirk Dorfs4Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167 Hannover, GermanyInstitute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167 Hannover, GermanyInstitute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167 Hannover, GermanyInstitute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167 Hannover, GermanyInstitute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167 Hannover, GermanyCryogels 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-Fe<sub>2</sub>O<sub>3</sub> 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-Fe<sub>2</sub>O<sub>3</sub> 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-Fe<sub>2</sub>O<sub>3</sub> cryogel, making them promising materials for the development of direct ethanol fuel cells.https://www.mdpi.com/2073-4344/13/7/1074electrocatalysismetal oxidePtPdnanoparticlescryogels |
| spellingShingle | Hadir Borg Irene Morales Daniel Kranz Nadja C. Bigall Dirk Dorfs Cryogels from Pt/γ-Fe<sub>2</sub>O<sub>3</sub> and Pd/γ-Fe<sub>2</sub>O<sub>3</sub> NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction Catalysts electrocatalysis metal oxide Pt Pd nanoparticles cryogels |
| title | Cryogels from Pt/γ-Fe<sub>2</sub>O<sub>3</sub> and Pd/γ-Fe<sub>2</sub>O<sub>3</sub> NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction |
| title_full | Cryogels from Pt/γ-Fe<sub>2</sub>O<sub>3</sub> and Pd/γ-Fe<sub>2</sub>O<sub>3</sub> NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction |
| title_fullStr | Cryogels from Pt/γ-Fe<sub>2</sub>O<sub>3</sub> and Pd/γ-Fe<sub>2</sub>O<sub>3</sub> NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction |
| title_full_unstemmed | Cryogels from Pt/γ-Fe<sub>2</sub>O<sub>3</sub> and Pd/γ-Fe<sub>2</sub>O<sub>3</sub> NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction |
| title_short | Cryogels from Pt/γ-Fe<sub>2</sub>O<sub>3</sub> and Pd/γ-Fe<sub>2</sub>O<sub>3</sub> NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction |
| title_sort | cryogels from pt γ fe sub 2 sub o sub 3 sub and pd γ fe sub 2 sub o sub 3 sub nps as promising electrocatalysts for ethanol oxidation reaction |
| topic | electrocatalysis metal oxide Pt Pd nanoparticles cryogels |
| url | https://www.mdpi.com/2073-4344/13/7/1074 |
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