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Article

Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction

Department of Chemistry, University of Copenhagen, 5 Universitetsparken, 2100 Copenhagen, Denmark
*
Authors to whom correspondence should be addressed.
These authors contributed equally.
Received: 8 October 2020 / Revised: 21 October 2020 / Accepted: 23 October 2020 / Published: 28 October 2020
(This article belongs to the Special Issue Palladium Catalysts: From Design to Applications)
Precious metal nanoparticles, in particular palladium nanomaterials, show excellent catalytic properties and are key in the development of energy systems. For instance, ethanol fuel cells are promising devices for sustainable energy conversion, where Pd-based catalysts are key catalysts for the related ethanol oxidation reaction (EOR). Pd is a limited resource; thus, a remaining challenge is the development of efficient and stable Pd-based catalysts. This calls for a deeper understanding of the Pd properties at the nanoscale. This knowledge can be gained in comparative studies of different Pd nanomaterials. However, such studies remain challenging to perform and interpret due to the lack of cross-studies using the same Pd nanomaterials as a reference. Here, as-prepared sub 3 nm diameter surfactant-free Pd nanoparticles supported on carbon are obtained by a simple approach. The as-prepared catalysts with Pd loading 10 and 30 wt % show higher activity and stability compared to commercially available counterparts for the EOR. Upon electrochemical testing, a significant size increase and loss of electrochemical active surface are observed for the as-prepared catalysts, whereas the commercial samples show an increase in the electrochemically active surface area and moderate size increase. This study shines light on the challenging comparison of different catalysts across the literature. Further advancement in Pd (electro)catalyst design will gain from including self-prepared catalysts. The simple synthesis detailed easily leads to suitable nanoparticles to be used as a reference for more systematic comparative studies of Pd catalysts across the literature. View Full-Text
Keywords: Palladium; nanoparticles; ethanol oxidation; energy conversion; benchmarking Palladium; nanoparticles; ethanol oxidation; energy conversion; benchmarking
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MDPI and ACS Style

Schreyer, O.A.H.; Quinson, J.; Escudero-Escribano, M. Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction. Inorganics 2020, 8, 59. https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics8110059

AMA Style

Schreyer OAH, Quinson J, Escudero-Escribano M. Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction. Inorganics. 2020; 8(11):59. https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics8110059

Chicago/Turabian Style

Schreyer, Oliver A.H.; Quinson, Jonathan; Escudero-Escribano, María. 2020. "Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction" Inorganics 8, no. 11: 59. https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics8110059

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