Alfani, Vinalia Sae (2025) Perbedaan Efek Suhu Kerja 20ºC Dan 35ºC Terhadap Nilai Potensial Material Katalis Fe-N-C Dari Pelepah Kelapa Sawit Sebagai Sumber Karbon Untuk Reaksi Reduksi Oksigen (ORR). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mengetahui pengaruh suhu terhadap aktivitas elektrokatalitik material Fe–N–C yang disintesis dari limbah pelepah kelapa sawit untuk reaksi reduksi oksigen (ORR). Sintesis dilakukan melalui metode pirolisis dengan penambahan prekursor besi dan nitrogen, kemudian dikarakterisasi menggunakan FTIR, XRD, dan SEM-EDX. Pengujian elektrokimia dilakukan dalam larutan KOH 0,1 M menggunakan metode Cyclic Voltammetry (CV) dan Linear Sweep Voltammetry (LSV) pada suhu 20°C dan 35°C. Hasil CV menunjukkan bahwa pada suhu 35°C, Fe–N–C memiliki nilai onset potential –0,275 V (vs Ag/AgCl) dan puncak potensial reduksi –0,424 V (vs Ag/AgCl), yang menunjukkan aktivitas katalitik lebih baik dibandingkan suhu 20°C. LSV memperkuat hasil tersebut dengan arus katodik yang lebih stabil pada suhu tinggi, meskipun arus maksimum tercatat sedikit lebih besar pada 20°C. Kurva CV juga menunjukkan arus katodik yang lebih dominan dari pada arus anodik, menandakan kestabilan elektrokimia selama siklus reaksi. Struktur pori dan morfologi yang homogen turut mendukung efisiensi reaksi. Secara keseluruhan, Fe–N–C dari pelepah kelapa sawit menunjukkan potensi sebagai katalis non-logam alternatif untuk sistem Direct Methanol Fuel Cell (DMFC), ditunjukkan oleh nilai onset potential –0,275 V (vs Ag/AgCl), puncak potensial reduksi –0,424 V (vs Ag/AgCl),dan kepadatan arus maksimum sebesar -0,0011 A cm⁻² dengan suhu 35°C sebagai kondisi kerja optimum.
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This study investigates the effect of temperature on the electrocatalytic activity of Fe–N–C synthesized from oil palm frond waste for the oxygen reduction reaction (ORR). The material was synthesized via pyrolysis using iron and nitrogen precursors, with characterization performed using FTIR, XRD, and SEM-EDX. Electrochemical tests were conducted in 0.1 M KOH using Cyclic Voltammetry (CV) and Linear Sweep Voltammetry (LSV) at 20°C and 35°C to evaluate ORR performance. CV analysis showed that Fe–N–C exhibited an onset potential of –0.275 V (vs Ag/AgCl) and a reduction peak of –0.424 V (vs Ag/AgCl) at 35°C, indicating better catalytic activity compared to that of 20°C. LSV results supported this statement, showing more stable cathodic current densities at 35°C, although slightly higher current density was recorded at 20°C. The CV curves also revealed dominant cathodic over anodic response, suggesting strong ORR activity and electrochemical stability. The porous structure and homogeneous morphology contributed to improved mass transport and active surface area. Overall, Fe–N–C derived from oil palm fronds demonstrates potential as an alternative non-metal catalyst for Direct Methanol Fuel Cell (DMFC) systems, as indicated by an onset potential of –0.275 V (vs Ag/AgCl), a reduction peak potential of –0.424 V (vs Ag/AgCl), and a maximum current density of –0.0011 A cm⁻², with 35°C identified as the optimum operating temperature.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Cyclic Voltammetry, Fe–N–C, Linear Sweep Voltammetry, Pelepah Kelapa Sawit, Reaksi Reduksi Oksigen (ORR), Cyclic Voltammetry, Fe–N–C, Linear Sweep Voltammetry, Oil Palm Frond, Oxygen Reaction Reduction (ORR) |
| Subjects: | Q Science > QD Chemistry > QD569 Electrocatalysis. |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Vinalia Sae Alfani |
| Date Deposited: | 04 Aug 2025 11:51 |
| Last Modified: | 04 Aug 2025 11:51 |
| URI: | http://repository.its.ac.id/id/eprint/127080 |
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