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Achieving ultra-high platinum utilization via optimization of PEM fuel cell cathode catalyst layer microstructure

Marquis, J; Coppens, M-O; (2013) Achieving ultra-high platinum utilization via optimization of PEM fuel cell cathode catalyst layer microstructure. Chemical Engineering Science , 102 151 - 162. 10.1016/j.ces.2013.08.003. Green open access

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Abstract

Inefficient usage of expensive platinum catalyst has plagued the design of PEM fuel cells and contributed to the limited production and use of fuel cell systems. Here, it is shown that hierarchical optimization can increase platinum utilization 30-fold over existing catalyst layer designs while maintaining power densities over 0.35 W/cm2. The cathode catalyst layer microstructure is optimized with respect to platinum utilization (measured as kilowatts of electricity produced per gram of platinum). A one-dimensional agglomerate model that accounts for liquid water saturation is used in this study. The cathode catalyst layer microstructure is optimized by manipulating the platinum loading (m Pt), platinum-to-carbon ratio (Pt|C), and catalyst layer void fraction View the MathML source(εVcl). The resulting catalyst layer microstructure features ultra-low platinum loadings of roughly 0.01 mg/cm2.

Type: Article
Title: Achieving ultra-high platinum utilization via optimization of PEM fuel cell cathode catalyst layer microstructure
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ces.2013.08.003
Publisher version: http://dx.doi.org/10.1016/j.ces.2013.08.003
Language: English
Additional information: This is an Elsevier open access article.
Keywords: Catalysis, Electrochemistry, Energy, Optimization, Fuel cell, Microstructure
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1401737
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