A simple method for enhancing the catalytic activity of Pd deposited on carbon nanotubes used in direct formic acid fuel cells

Marta Mazurkiewicz-Pawlicka , Artur Małolepszy , Anna Mikołajczuk-Zychora , Bogusław Mierzwa , Andrzej Borodziński , Leszek Stobiński

Abstract

Palladium catalysts deposited on carbon nanotubes are used as the anode material in a direct formic acid fuel cell (DFAFC). In this paper we propose a simple method for enhancing the catalytic activity of Pd deposited on carbon nanotubes for formic acid electrooxidation by using ammonia solution. Multiwall carbon nanotubes (MWCNTs) used as the catalyst support are oxidized with concentrated nitric acid for 6 and 50 h. During the oxidation polynuclear aromatic compounds (PACs) are formed. We propose the use of ammonia solution after the oxidation process to remove the PACs from the carbon nanotubes surface. The properties of differently functionalized MWCNTs are studied and the results show that the use of ammonia solution removes the PACs formed during the oxidation process. The oxidation time of the carbon nanotubes has also a significant effect on the properties of the obtained catalysts. The palladium catalysts deposited on MWCNTs oxidized for a shorter time and rinsed with ammonia solution exhibit the highest initial activity in electrooxidation of formic acid in DFAFC (P = 216 mW mgPd−1).
Author Marta Mazurkiewicz-Pawlicka (FCPE / DSP)
Marta Mazurkiewicz-Pawlicka,,
- Department of Separation Processes
, Artur Małolepszy (FCPE / DSP)
Artur Małolepszy,,
- Department of Separation Processes
, Anna Mikołajczuk-Zychora
Anna Mikołajczuk-Zychora,,
-
, Bogusław Mierzwa
Bogusław Mierzwa,,
-
, Andrzej Borodziński
Andrzej Borodziński,,
-
, Leszek Stobiński (FCPE / GL)
Leszek Stobiński,,
- WUT Grafen Laboratory
Journal seriesApplied Surface Science, ISSN 0169-4332, (A 35 pkt)
Issue year2019
Vol476
Pages806-814
Publication size in sheets0.5
Keywords in Englishcatalysts, carbon nanotubes, direct formic acid fuel cells, palladium, polynuclear aromatic compounds
ASJC Classification2508 Surfaces, Coatings and Films
DOIDOI:10.1016/j.apsusc.2019.01.114
URL https://ac.els-cdn.com/S0169433219301357/1-s2.0-S0169433219301357-main.pdf?_tid=1b589bfd-625b-45f8-a499-14ffec9b3663&acdnat=1549967012_9e9755d7cded6752ba6b4d7ee4183971
Languageen angielski
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Mazurkiewicz-Pawlicka M. - A simple method...pdf 2.41 MB
Score (nominal)35
ScoreMinisterial score = 35.0, 08-05-2019, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 03-04-2019, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.225; WoS Impact Factor: 2017 = 4.439 (2) - 2017=3.743 (5)
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