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Triple phase boundary and power density enhancement in PEMFCs of a Pt/C electrode with double catalyst layers

Authors
Dung Van DaoAdilbish, GanpurevThanh Duc LeLee, In-HwanYu, Yeon-Tae
Issue Date
19-5월-2019
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v.9, no.27, pp.15635 - 15641
Indexed
SCIE
SCOPUS
Journal Title
RSC ADVANCES
Volume
9
Number
27
Start Page
15635
End Page
15641
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/65397
DOI
10.1039/c9ra01741k
ISSN
2046-2069
Abstract
Exploring efficient approaches to design electrodes for proton exchange membrane fuel cells (PEMFCs) is of great advantage to overcome the current limitations of the standard platinum supported carbon (Pt/C) catalyst. Herein, a Pt/C electrode consisting of double catalyst layers (DCL) with low Pt loading of around 0.130 mg(Pt) cm(-2) is prepared using spray and electrophoresis (EPD) methods. The DCL electrode demonstrated a higher electrochemical surface area (ECSA-52.5 m(2) g(Pt)(-1)) and smaller internal resistance (133 ) as compared to single catalyst layer (SCL) sprayed (37.1 m(2) g(Pt)(-1) and 184 ) or EPD (42.4 m(2) g(Pt)(-1) and 170 ) electrodes. In addition, the corresponding DCL membrane electrode assembly (MEA), which consists of a Pt/C DCL electrode at the anode side and a Pt/C sprayed electrode at the cathode side, also showed improved PEMFC performance as compared to others. Specifically, the DCL MEA generated the highest power density of 4.9 W mg(Pt)(-1), whereas, the SCL MEAs only produced 3.1 and 3.8 W mg(Pt)(-1), respectively. The superior utilization of the Pt catalysts into the DCL MEA can originate from the enrichment of the triple phase boundary (TPB) presented on the Pt/C DCL electrode, which can strongly promote the adsorbed hydrogen intermediates' removal from the anode side, thus improving the overall PEMFC performance.
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