In this section
@article{Jackson:2023:10.1021/acsaem.3c01987,
author = {Jackson, C and Metaxas, M and Dawson, J and Kucernak, AR},
doi = {10.1021/acsaem.3c01987},
journal = {ACS Applied Energy Materials},
pages = {12296--12306},
title = {Nanostructured catalyst layer allowing production of ultralow loading electrodes for polymer electrolyte membrane fuel cells with superior performance},
url = {http://dx.doi.org/10.1021/acsaem.3c01987},
volume = {6},
year = {2023}
}
TY - JOUR
AB - This study introduces a simple method to produce ultralow loading catalyst-coated membrane electrodes, with an integrated carbon “nanoporous layer”, for use in polymer electrolyte membrane fuel cells or other electrochemical devices. This approach allows fabrication of electrodes with loadings down to 5.2 μgPt cm–2 on the anode and cathode (total 10.4 μgPt cm–2, Pt3Zn/C catalyst) in a controlled, uniform, and reproducible manner. These layers achieve high utilization of the catalyst as measured through electrochemical surface area and mass specific activities. Electrodes composed of Pt/C, PtNi/C, Pt3Co/C, and Pt3Zn/C catalysts containing 5.2–7.1 μgPt cm–2 have been fabricated and tested. These electrodes showed an impressive performance of 111 ± 8 A mgPt–1 at 0.65 V on Pt3Co/C with a power density of 31 ± 2 kW gPt,total–1, about double that of the best previous literature electrodes under the same operating conditions. The performance appears apparently mass transport free and dominated by electrokinetics over a very wide potential range, and thus, these are ideal systems to study oxygen electrokinetics within the fuel cell environment. The improved performance is associated with reduced “contact resistance” and more specifically a reduction in the resistance to lateral current flow in the catalyst layer. Analytical expressions for the effect illuminate approaches to improve electrode design for electrochemical devices in which catalyst utilization is key.
AU - Jackson,C
AU - Metaxas,M
AU - Dawson,J
AU - Kucernak,AR
DO - 10.1021/acsaem.3c01987
EP - 12306
PY - 2023///
SN - 2574-0962
SP - 12296
TI - Nanostructured catalyst layer allowing production of ultralow loading electrodes for polymer electrolyte membrane fuel cells with superior performance
T2 - ACS Applied Energy Materials
UR - http://dx.doi.org/10.1021/acsaem.3c01987
UR - http://hdl.handle.net/10044/1/108854
VL - 6
ER -
Prof. Anthony Kucernak
G22B
Molecular Sciences Research Hub (MSRH)
Imperial College London
White City Campus
London
W12 0BZ
United Kingdom
Phone: +44 (0)20 7594 5831
Fax: +44 (0)20 7594 5804
Email: anthony@imperial.ac.uk