UJI KINERJA MEMBRANE ELECTRODE ASSEMBLY (MEA) YANG DIBUAT DENGAN METODE CCM DAN CCS PADA UNITIZED REGENERATIVE FUEL CELL (URFC)

NURCHOLIFAH, YOLLANDA and Rohendi, Dedi and Syarif, Nirwan (2025) UJI KINERJA MEMBRANE ELECTRODE ASSEMBLY (MEA) YANG DIBUAT DENGAN METODE CCM DAN CCS PADA UNITIZED REGENERATIVE FUEL CELL (URFC). Masters thesis, Sriwijaya University.

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Abstract

This study compares the performance testing of Membrane Electrode Assemblies (MEAs) made using the CCS method with single-layer and three-layer catalyst electrodes, and MEAs made using the CCM method with three-layer catalysts. The analysis of the electrodes using the CV method showed that the ECSA values of Pt/C and Pt-Ru/C with three layers of catalysts were 75.2 × 10⁻² m²/g and 121.6 × 10⁻² m²/g, respectively, while the ECSA values for Pt/C and Pt-Ru/C with a single catalyst layer were 21 × 10⁻² and 12.9 × 10⁻² m²/g, respectively. This was supported by electrode characterization data using XRD, which showed that the electrode with Pt/C catalyst had a larger average crystal size compared to Pt-Ru/C, with a size of 21.665 nm, while Pt-Ru/C had an average crystal size of 14.328 nm. XRF characterization showed that the Pt/C spectrum only displayed a peak for Pt without any indication of Ru, consistent with a composition almost entirely of Pt (96.491%), while the Pt-Ru/C spectrum displayed a strong peak for Pt at 9-12 keV (Pt Lα and Pt Lβ) and a peak for Ru at 18-23 keV (Ru Kα and Ru Kβ). Although the intensity of Pt in Pt/C was higher, the absence of Ru reduced the ECSA value as there was no synergy to enhance catalytic performance, unlike in Pt-Ru/C. SEM characterization of the MEA CCS with three-layer catalyst electrodes showed an average catalyst layer thickness of 164.817 μm, with a neat and uniform arrangement on both sides of the Nafion-212 membrane, while the MEA CCS with a single catalyst layer exhibited a thinner catalyst layer, with a thickness of 141.349 μm. The MEA CCM with three catalyst layers had a catalyst layer thickness of 109.521 μm and showed a less uniform surface. The MEA CCS with three-layer catalyst electrodes achieved the highest RTE of 100% at a current density of 4 mA/cm², whereas the MEA CCM with three-layer catalyst electrodes had an RTE of 40.38% at the same current density, and the MEA CCS with a single layer catalyst had a lower RTE of 21.81%.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	URFC, Round-Trip Efficiency (RTE), Pt-Ru/C, Membrane Electrode Assembly (MEA), dan ECSA.
Subjects:	T Technology > TP Chemical technology > TP250-261 Industrial electrochemistry
Divisions:	08-Faculty of Mathematics and Natural Science > 47102-Chemistry (S2)
Depositing User:	Yollanda Nurcholifah
Date Deposited:	08 May 2025 02:39
Last Modified:	08 May 2025 02:39
URI:	http://repository.unsri.ac.id/id/eprint/171516

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