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Cost effective alloys based catalysts for alkaline fuel cells application

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2019
Gajic-Krstajic_YUCOMAT_WRTCS.pdf (675.1Kb)
Authors
Gajić Krstajić, Ljiljana
Jović, Borka
Jović, Vladimir
Zabinski, Piotr
Elezović, Nevenka
Conference object (Published version)
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Abstract
Alkaline fuel cells (AFCs) have recently become attractive as environmental friendly future power sources. It was really important having in mind that in alkaline media less expensive non noble catalysts could be used. Namely, successful alkaline anion exchange membrane development enabled benefits of faster kinetics of oxygen reduction reaction in alkaline solutions. In this study electrodeposited silver-palladium alloys of various composition were investigated and tested as the prospective catalysts for direct ethanol fuel cells application. All samples were characterized by scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, as well as by electrochemical techniques: cyclic voltammetry, polarization measurements at rotating disc electrode. The electrochemical active surface area was determined from the charge values corresponding to the reduction of Pd (II) oxide, assuming 420 μC for full oxide monolayer coverage. The optimal alloy composit...ion showing the best catalytic activity for oxygen reduction and ethanol oxidation, with as much as possible lower content of Pd, was determined. It was found that it could be possible to obtain alloys containing only ~ 20% of more noble metal – palladium, showing high activity for both anode and cathode reaction. The stability testing gave very promising results, as well.

Keywords:
alkaline fuel cells / silver-palladium alloys / atalysts / palladium
Source:
Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019, 2019, 104-104
Publisher:
  • Belgrade : Materials Research Society of Serbia
Projects:
  • Development, characterization and application nanostructured and composite electrocatalysts and interactive supports for fuel cells and water electrolysis (RS-172054)
  • COST Action MP1407 - Electrochemical processing methodologies and corrosion protection for device and systems miniaturization (e-MINDS)

ISSN: 978-86-919111-4-0

[ Google Scholar ]
URI
http://dais.sanu.ac.rs/123456789/6675
Collections
  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences of SASA
TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Jović, Borka
AU  - Jović, Vladimir
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/6675
AB  - Alkaline fuel cells (AFCs) have recently become attractive as environmental friendly future power sources. It was really important having in mind that in alkaline media less expensive non noble catalysts could be used. Namely, successful alkaline anion exchange membrane development enabled benefits of faster kinetics of oxygen reduction reaction in alkaline solutions. In this study electrodeposited silver-palladium alloys of various composition were investigated and tested as the prospective catalysts for direct ethanol fuel cells application. All samples were characterized by scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, as well as by electrochemical techniques: cyclic voltammetry, polarization measurements at rotating disc electrode. The electrochemical active surface area was determined from the charge values corresponding to the reduction of Pd (II) oxide, assuming 420 μC for full oxide monolayer coverage. The optimal alloy composition showing the best catalytic activity for oxygen reduction and ethanol oxidation, with as much as possible lower content of Pd, was determined. It was found that it could be possible to obtain alloys containing only ~ 20% of more noble metal – palladium, showing high activity for both anode and cathode reaction. The stability testing gave very promising results, as well.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019
T1  - Cost effective alloys based catalysts for alkaline fuel cells application
SP  - 104
EP  - 104
ER  - 
@conference{
author = "Gajić Krstajić, Ljiljana and Jović, Borka and Jović, Vladimir and Zabinski, Piotr and Elezović, Nevenka",
year = "2019",
url = "http://dais.sanu.ac.rs/123456789/6675",
abstract = "Alkaline fuel cells (AFCs) have recently become attractive as environmental friendly future power sources. It was really important having in mind that in alkaline media less expensive non noble catalysts could be used. Namely, successful alkaline anion exchange membrane development enabled benefits of faster kinetics of oxygen reduction reaction in alkaline solutions. In this study electrodeposited silver-palladium alloys of various composition were investigated and tested as the prospective catalysts for direct ethanol fuel cells application. All samples were characterized by scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, as well as by electrochemical techniques: cyclic voltammetry, polarization measurements at rotating disc electrode. The electrochemical active surface area was determined from the charge values corresponding to the reduction of Pd (II) oxide, assuming 420 μC for full oxide monolayer coverage. The optimal alloy composition showing the best catalytic activity for oxygen reduction and ethanol oxidation, with as much as possible lower content of Pd, was determined. It was found that it could be possible to obtain alloys containing only ~ 20% of more noble metal – palladium, showing high activity for both anode and cathode reaction. The stability testing gave very promising results, as well.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019",
title = "Cost effective alloys based catalysts for alkaline fuel cells application",
pages = "104-104"
}
Gajić Krstajić L, Jović B, Jović V, Zabinski P, Elezović N. Cost effective alloys based catalysts for alkaline fuel cells application. Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019. 2019;:104-104
Gajić Krstajić, L., Jović, B., Jović, V., Zabinski, P.,& Elezović, N. (2019). Cost effective alloys based catalysts for alkaline fuel cells application.
Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019Belgrade : Materials Research Society of Serbia., null, 104-104. 
Gajić Krstajić Ljiljana, Jović Borka, Jović Vladimir, Zabinski Piotr, Elezović Nevenka, "Cost effective alloys based catalysts for alkaline fuel cells application" null (2019):104-104

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