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

Dung Van Dao, Ganpurev Adilbish, Thanh Duc Le, In-Hwan Lee, Yeon Tae Yu

Research output: Contribution to journalArticle

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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 Ω) as compared to single catalyst layer (SCL) sprayed (37.1 m 2 g Pt -1 and 184 Ω) or EPD (42.4 m 2 g Pt -1 and 170 Ω) 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.

Original languageEnglish
Pages (from-to)15635-15641
Number of pages7
JournalRSC Advances
Volume9
Issue number27
DOIs
Publication statusPublished - 2019 Jan 1

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Phase boundaries
Proton exchange membrane fuel cells (PEMFC)
Platinum
Carbon
Electrodes
Catalysts
Membranes
Anodes
Electrophoresis
Hydrogen
Cathodes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Triple phase boundary and power density enhancement in PEMFCs of a Pt/C electrode with double catalyst layers. / Dao, Dung Van; Adilbish, Ganpurev; Le, Thanh Duc; Lee, In-Hwan; Yu, Yeon Tae.

In: RSC Advances, Vol. 9, No. 27, 01.01.2019, p. 15635-15641.

Research output: Contribution to journalArticle

Dao, Dung Van ; Adilbish, Ganpurev ; Le, Thanh Duc ; Lee, In-Hwan ; Yu, Yeon Tae. / Triple phase boundary and power density enhancement in PEMFCs of a Pt/C electrode with double catalyst layers. In: RSC Advances. 2019 ; Vol. 9, No. 27. pp. 15635-15641.
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