Thermal and chemical activation methods applied to DFAFC anodes prepared by magnetron sputtering

Igor Bieloshapka , Petr Jiricek , Yurii Yakovlev , Karel Hruska , Elena Tomsik , Jana Houdkova , Artur Małolepszy , Marta Mazurkiewicz-Pawlicka , Y. Lobko , B. Lesiak

Abstract

Anodes consisting of Pd and bimetallic PdCu catalysts deposited directly on a carbon cloth by magnetron sputtering have been tested in a direct formic acid fuel cell. Current-voltage measurements showed that a bimetallic Pd-based catalyst temperature-treated to 300 °C exhibits the highest catalytic activity. Chemical and structural information from the surface of the catalysts was revealed by X-ray photoelectron spectroscopy (XPS) and by scanning electron microscopy (SEM). Increasing the temperature of the anode together with hydrogen peroxide (H2O2) treatment of the catalyst surface was proposed as an additional treatment method. In this method, the highest catalytic activity was achieved (P = 56 mW mg−1) for a monometallic Pd catalyst. The enhanced catalytic efficiency after these methods had been applied was attributed to the decrease in the content of metal oxide forms, carbon-oxygen groups, and PdCx surface contamination, where the PdCx surface content played a major role.
Author Igor Bieloshapka
Igor Bieloshapka,,
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, Petr Jiricek
Petr Jiricek,,
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, Yurii Yakovlev
Yurii Yakovlev,,
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, Karel Hruska
Karel Hruska,,
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, Elena Tomsik
Elena Tomsik,,
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, Jana Houdkova
Jana Houdkova,,
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, Artur Małolepszy (FCPE / DSP)
Artur Małolepszy,,
- Department of Separation Processes
, Marta Mazurkiewicz-Pawlicka (FCPE / DSP)
Marta Mazurkiewicz-Pawlicka,,
- Department of Separation Processes
, Y. Lobko
Y. Lobko,,
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, B. Lesiak
B. Lesiak,,
-
Journal seriesInternational Journal of Hydrogen Energy, ISSN 0360-3199, e-ISSN 1879-3487
Issue year2020
Vol45
No27
Pages14133-14144
Publication size in sheets0.55
Keywords in EnglishPd-based catalysts, electro-oxidation reaction, direct formic acid fuel cells (DFAFC), magnetron sputtering, anode treatment, XPS
ASJC Classification2102 Energy Engineering and Power Technology; 2103 Fuel Technology; 2105 Renewable Energy, Sustainability and the Environment; 3104 Condensed Matter Physics
DOIDOI:10.1016/j.ijhydene.2020.03.116
URL https://www.sciencedirect.com/science/article/pii/S0360319920310788#!
Languageen angielski
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Bieloshapka I. (i in.) - Thermal and chemical activation...pdf 2.48 MB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 10-06-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.128; WoS Impact Factor: 2018 = 4.084 (2) - 2018=3.969 (5)
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