Back to Search Start Over

Cryogels from Pt/γ-Fe 2 O 3 and Pd/γ-Fe 2 O 3 NPs as Promising Electrocatalysts for Ethanol Oxidation Reaction.

Authors :
Borg, Hadir
Morales, Irene
Kranz, Daniel
Bigall, Nadja C.
Dorfs, Dirk
Source :
Catalysts (2073-4344); Jul2023, Vol. 13 Issue 7, p1074, 14p
Publication Year :
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-Fe<subscript>2</subscript>O<subscript>3</subscript> 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<subscript>2</subscript>O<subscript>3</subscript> 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<subscript>2</subscript>O<subscript>3</subscript> cryogel, making them promising materials for the development of direct ethanol fuel cells. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20734344
Volume :
13
Issue :
7
Database :
Complementary Index
Journal :
Catalysts (2073-4344)
Publication Type :
Academic Journal
Accession number :
168601114
Full Text :
https://doi.org/10.3390/catal13071074