Analisis Pengaruh Temperatur Pirolisis dan Rasio Melamin:FeCl3.6H2O Pada Katalis Pt/Fe-N-C Untuk Aplikasi Katoda PEMFC

ibrahim, Asyqar Yusuf (2026) Analisis Pengaruh Temperatur Pirolisis dan Rasio Melamin:FeCl3.6H2O Pada Katalis Pt/Fe-N-C Untuk Aplikasi Katoda PEMFC. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Performa Proton Exchange Membrane Fuel Cell (PEMFC) sangat ditentukan oleh struktur material serta sifat elektrokimia katalis. Namun, katalis Pt/C berbasis karbon hitam yang tersedia secara komersial memiliki kelemahan utama terkait stabilitas pada siklus tinggi akibat degradasi material selama proses oksidasi. Selain itu, langkah alternatif menggabungkan Pt dengan logam transisi masih menghadapi tantangan serta biaya sintesis yang tinggi. Penelitian ini bertujuan untuk menganalisis pengaruh modifikasi karbon melalui High-Temperatur Graphitization dengan doping Fe dan Nitrogen dan menganalisis pengaruh temperatur pirolisis dan komposisi melamin dengan FeCl3.6H2O dalam proses sintesis katalis Pt/Fe-N-C terhadap struktur material, sifat elektrokimia, serta performa pada pengaplikasian PEMFC. Penelitian ini, dilakukan pengujian karakterisasi material (XRD, FTIR, dan SEM-EDX-Elemental Mapping), pengujian elektrokimia (CV&LSV), dan pengujian performa (single cell). Melalui pengujian karakterisasi, diketahui bahwa proses modifikasi karbon mempengaruhi struktur dengan adanya Fe, Nitrogen, dan graphitic karbon, geometri yang dominan tidak seragam. Kemudian melalui pengujian karakterisasi XRD, diketahui bahwa proses sintesis katalis Pt/Fe-N-C menghasilkan Pt dengan indeks miller Pt(111), Pt(200), Pt(220), Pt(311), dan Pt(222), serta teridentifikasi fasa modifikasi karbon yaitu Fe3C, FeN0,0324, dan C. Pengujian CV dan LSV menunjukkan bahwa variasi terbaik diperoleh pada Pt/Fe-N-C dengan temperatur pirolisis 900°C dan komposisi 20:1, yang menghasilkan nilai ECSA sebesar 55,18 m²/gPt, number of electron sebesar 3,99, E₁/₂ sebesar 0,838 V, E₀ sebesar 0,951 V, limiting current sebesar 5,37 mA/cm², mass activity sebesar 207,72 mA/mgPt, serta power density pada temperatur 60°C dan 25°C sebesar 0,28306 W/cm² dan 0,29566 W/cm². Nilai degradasi dari CV stabilitas sebesar 29,97% menunjukkan hasil yang lebih baik dibandingkan Pt/C komersial selama 5.000 siklus.
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The performance of proton exchange membrane fuel cells (PEMFCs) is largely determined by the structure of the material and the electrochemical properties of the catalyst. However, commercially available Pt/C catalysts based on carbon black have a major drawback in terms of stability at high cycles due to material degradation during the oxidation process. In addition, alternative approaches combining Pt with transition metals still face challenges and high synthesis costs. This study aims to analyze the effect of carbon modification through high-temperature graphitization with Fe and nitrogen doping, analyze the effect of pyrolysis temperature and melamine composition with FeCl3.6H2O in the synthesis process of Pt/Fe-N-C catalysts on material structure, electrochemical properties, and performance in PEMFC applications. In this study, material characterization tests (XRD, FTIR& SEM-EDX-Elemental Mapping), electrochemical tests (CV&LSV), and performance tests (single cell) were conducted. Through characterization testing, it was found that the carbon modification process affected the structure with the presence of Fe, nitrogen, and graphitic carbon, and the dominant geometry was uniform, but rather a mixture of graphitic sheets and tubes. Then, through XRD characterization testing, it was found that the Pt/Fe-N-C catalyst synthesis process produced Pt with the miller indices Pt(111), Pt(200), Pt(220), Pt(311), and Pt(222), and identified the carbon modification phases, namely Fe3C, FeN0.0324, and C. Through CV and LSV testing, Through CV and LSV testing, the best variation was obtained in Pt/Fe-N-C with a pyrolysis temperature of 900oC and a composition of 20:1, which produced an ECSA value of 55.18 m2/grpt, number of electrons 3.99, E1/2 0.838 V, E0 0.951 V, limiting current of 5.37 mA/cm², mass activity of 207.72 mA/mgPt, and power density at temperatures of 25°C and 25°C of 0.28306 W/cm² and 0.29566 W/cm², respectively. The degradation Pt/Fe-N-C 900oC was 29.97%, which was better than that of commercial Pt/C for 5000 cycles.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Katalis PEMFC, ORR, Pirolisis, Pt/Fe–N–C, Rasio melamin/FeCl₃.6H2O
Subjects:	T Technology > TP Chemical technology T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial. T Technology > TP Chemical technology > TP315 Fuel
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Asyqar Yusuf Ibrahim
Date Deposited:	22 Jul 2026 02:54
Last Modified:	22 Jul 2026 02:54
URI:	http://repository.its.ac.id/id/eprint/136341

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