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PENGARUH GRAPHENE OXIDE SEBAGAI SUPPORT KATALIS PLATINUM UNTUK KATODE PROTON EXCHANGE MEMBRANE FUEL CELL (PEMFC)

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Penilaian

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Fuel cells have now become a primary focus as a promising future energy source. In particular, proton exchange membrane fuel cell (PEMFC) technology holds broad application potential and is predicted to play a significant role in future energy systems. This study aims to characterize platinum catalysts supported by graphene oxide (GO) and to determine the effect of GO on the cathode performance in proton exchange membrane fuel cells (PEMFCs). The research methods include the synthesis of Pt/GO and Pt/C catalysts, reduction of Pt/GO and Pt/C, catalyst painting of Pt/GO or Pt/C onto the gas diffusion layer (GDL), physical characterization using thermogravimetric analysis (TGA) and X-ray diffraction (XRD), and electrochemical analysis through half-cell testing, cyclic voltammetry (CV), linear sweep voltammetry (LSV), galvanostatic testing, and galvanostatic electrochemical impedance spectroscopy (GEIS). The TGA results for Pt/GO showed a weight loss between 73–425 ℃, interpreted as the loss of volatile components. In contrast, the PtNW/C (platinum nanowires on carbon) sample exhibited weight loss around 200 ℃ due to the removal of oxygen-containing functional groups such as hydroxyl (OH) and carboxylic acid (COOH). The XRD results indicated that GO is amorphous at several crystal peaks. Platinum catalysts were detected in the XRD only for the Pt/GO sample, with a peak at 2θ = 18.16° and a minor peak at 2θ = 9.98°. Among the catalyst electrodes, the Pt/GO growing sample showed the highest electrochemical surface area (ECSA) value of 4.02 cm²/g. Graphene oxide as a catalyst support material significantly influenced the cathode performance in PEMFCs. The Pt/GO growing (Pt added by immersion together with GO that has been applied to GDL) catalyst exhibited an increased CV curve area compared to the Pt/GO catalyst. The best cathodic potential from the LSV test was observed in the Pt/GO sample, showing a cathodic value equal to the benchmark at 0.6 V, indicating the occurrence of the oxygen reduction reaction (ORR). Meanwhile, cathodic potentials from the LSV test for the Pt/GO and Pt/C growing samples indicated that the reaction occurring was hydrogen evolution reaction (HER), not ORR. The best polarization curve performance was found in the Pt/GO and Pt/GO growing samples, with onset potentials of 0.3 V and 0.5 V, respectively, which are not significantly different from the 40 wt% Pt/C sample at 0.0 V. This study provides insight into the potential of graphene oxide as a catalyst support material in PEMFCs, highlighting its promise in supporting the development of more efficient and sustainable clean energytechnologies. Keywords: Fuel Cell, Graphene Oxide (GO), Hydrogen, Catalyst, PEMFC.

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Availability

Inventory Code	Barcode	Call Number	Location	Status
2507006186	T185467	T1854672025	Central Library (Reference)	Available but not for loan - Not for Loan

Detail Information

Series Title

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Call Number

T1854672025

Publisher

Indralaya : Prodi Ilmu Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Sriwijaya., 2025

Collation

xviii, 78 hlm.; ilus.; tab.; 29 cm.

Language

Indonesia

ISBN/ISSN

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Classification

531.607

Content Type

Text

Media Type

unmediated

Carrier Type

other (computer)

Edition

-

Subject(s)

Prodi Ilmu Kimia
Energi Masa Depan

Specific Detail Info

-

Statement of Responsibility

MI

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