Advanced

SEM and XAS characterization at beginning of life of Pd-based cathode electrocatalysts in PEM fuel cells

Suarez Alcantara, Karina LU ; Martinez-Casillas, D. C.; Zheng, Kaibo LU ; Zhu, Qiushi LU ; Qenawy, Mohamed LU ; Haase, Dörthe LU ; Pullerits, Tönu LU ; Solorza-Feria, O. and Canton, Sophie LU (2014) In International Journal of Hydrogen Energy 39(10). p.5358-5370
Abstract
The fuel cell performance of membrane electrode assemblies with a Pt anode and Pd, PdCu or Pd5Cu4Pt cathodes has been tested during 116 h (beginning of life). The incorporation of Cu to Pd increases the fuel cell performance. Incorporation of Pt leads to further improvement. SEM micrographs of the as-prepared and the fuel cell-tested assemblies show the effects of the 116 h of continuous operation. Nafion membranes were characterized by small angle X-ray scattering. The results show a reduction of the size of the lamellar domains in the perfluorinated matrix after fuel cell testing, but no correlation with the cathode electrocatalyst material. The cathode electrocatalysts were characterized by ex-situ synchrotron radiation X-ray... (More)
The fuel cell performance of membrane electrode assemblies with a Pt anode and Pd, PdCu or Pd5Cu4Pt cathodes has been tested during 116 h (beginning of life). The incorporation of Cu to Pd increases the fuel cell performance. Incorporation of Pt leads to further improvement. SEM micrographs of the as-prepared and the fuel cell-tested assemblies show the effects of the 116 h of continuous operation. Nafion membranes were characterized by small angle X-ray scattering. The results show a reduction of the size of the lamellar domains in the perfluorinated matrix after fuel cell testing, but no correlation with the cathode electrocatalyst material. The cathode electrocatalysts were characterized by ex-situ synchrotron radiation X-ray diffraction and X-ray absorption spectroscopy at the Pd L-3, Cu K and Pt L-3 edges. Re-organization of Pd5Cu4Pt electrocatalyst after fuel cell testing was observed. The Cu in the electrocatalyst can be described as a nano-mixture of metallic Cu, alloyed Cu and CuO. The CuO acts as a promoter of the ORR. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Synchrotron radiation, Electrocatalyst, Fuel cell, Pd nanoparticles
in
International Journal of Hydrogen Energy
volume
39
issue
10
pages
5358 - 5370
publisher
Elsevier
external identifiers
  • wos:000334130800068
  • scopus:84897918575
ISSN
1879-3487
DOI
10.1016/j.ijhydene.2014.01.056
language
English
LU publication?
yes
id
818341f1-0281-4467-ab1d-79fa0d2afc37 (old id 4439365)
date added to LUP
2014-05-21 13:22:27
date last changed
2017-07-30 04:03:13
@article{818341f1-0281-4467-ab1d-79fa0d2afc37,
  abstract     = {The fuel cell performance of membrane electrode assemblies with a Pt anode and Pd, PdCu or Pd5Cu4Pt cathodes has been tested during 116 h (beginning of life). The incorporation of Cu to Pd increases the fuel cell performance. Incorporation of Pt leads to further improvement. SEM micrographs of the as-prepared and the fuel cell-tested assemblies show the effects of the 116 h of continuous operation. Nafion membranes were characterized by small angle X-ray scattering. The results show a reduction of the size of the lamellar domains in the perfluorinated matrix after fuel cell testing, but no correlation with the cathode electrocatalyst material. The cathode electrocatalysts were characterized by ex-situ synchrotron radiation X-ray diffraction and X-ray absorption spectroscopy at the Pd L-3, Cu K and Pt L-3 edges. Re-organization of Pd5Cu4Pt electrocatalyst after fuel cell testing was observed. The Cu in the electrocatalyst can be described as a nano-mixture of metallic Cu, alloyed Cu and CuO. The CuO acts as a promoter of the ORR. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.},
  author       = {Suarez Alcantara, Karina and Martinez-Casillas, D. C. and Zheng, Kaibo and Zhu, Qiushi and Qenawy, Mohamed and Haase, Dörthe and Pullerits, Tönu and Solorza-Feria, O. and Canton, Sophie},
  issn         = {1879-3487},
  keyword      = {Synchrotron radiation,Electrocatalyst,Fuel cell,Pd nanoparticles},
  language     = {eng},
  number       = {10},
  pages        = {5358--5370},
  publisher    = {Elsevier},
  series       = {International Journal of Hydrogen Energy},
  title        = {SEM and XAS characterization at beginning of life of Pd-based cathode electrocatalysts in PEM fuel cells},
  url          = {http://dx.doi.org/10.1016/j.ijhydene.2014.01.056},
  volume       = {39},
  year         = {2014},
}