Tsaqif, Hafizh Muhammad (2026) Analisis Pengaruh Temperatur Solvotermal Terhadap Struktur Dan Performa Elektrokatalitik Katalis Ptco/Nc Berbasis Zif/BP2000 Untuk Aplikasi PEMFC. Other thesis, INSTITUT TEKNOLOGI SEPULUH NOPEMBER.
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Abstract
Proton Exchange Membrane Fuel Cell (PEMFC) adalah salah satu sumber energi bersih masa depan yang paling menjanjikan. Namun demikian, terdapat berbagai tantangan dalam pengembangannya yaitu penggunaan Platinum (Pt) Platinum rentan mengalami penurunan aktivitas dan degradasi pada kondisi potensial tinggi serta lingkungan oksidasi asam di dalam PEMFC. Sehingga dilakukan penelitian untuk penggunaan katalis PtCo-NC berbasis ZIF-67/BP2000 untuk mengurangi penggunaan Pt dan meningkatkan performa Pt. Digunakan prekursor Pt berupa Pt(acac)2 dan juga prekursor ZIF-67 berupa Cobalt Nitrate Hexahydrate dan 2-methylimidazole. Proses yang menjadi variabel penelitian adalah dari temperatur proses solvotermal yaitu di 200 oC, 180 oC, 160 oC, dan 140 oC. Pengujian yang dilakukan untuk mengetahui struktur adalah Scanning Electon Microscope (SEM), X-Ray Diffraction (XRD), dan Fourier Transform Infrared (FTIR) sedangkan performa dilakukan Cyclic Voltammetry (CV), Linear Sweep Voltammetry (LSV), dan Single Cell. Hasil yang didapatkan adalah SEM menunjukkan semakin tinggi temperatur (200 oC) semakin beraglomariasi permukaan katalis. XRD menunjukkan bahwa terjadinya perubahan ikatan dari Pt/C komerisal dimana hanya ada puncak Pt, terjadi shifting ke kanan untuk terbentuknya ikatan PtCo. Selain itu didapatkan ukuran kristal paling besar dimiliki oleh PtCo-N-C (200 oC) pada ukuran 11.63 nm. Dari Hasil FTIR didapatkan hasil ikatan OH, CO2 , C=C, C=N, dan Co=N yang merupakan hasil dari ikatan logam pada ZIF-67 dengan karbon BP2000. Untuk performa didapatkan hasil ECSA dari uji CV katalis PtCo/N-C (140 oC) dimana didapatkan hasil 78,842 m2/mgpt. Untuk hasil LSV juga ditunjukkan dengan hasil electron number (n) terbaik ditunjukkan pada variasi PtCo/N-C (140 oC) dengan nilai 3,920. Hasil uji single cell menunjukkan performa yang tidak baik untuk katalis PtCo/N-C (180 oC) dimana performa power density maksimal yang mampu didapatkan adalah 0.028 W/cm2 dan current density yang mampu didapatkan merupakan 0,114 A/cm2 dimana hasilnya masih kurang dibandingkan dengan Pt/C. Dapat disimpulkan bahwa performa terbaik dari katalis yang dilakukan pengujian merupakan variasi katalis PtCo/N-C (140 oC) dengan performa terbaik dan juga morfologi yang terbaik.
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Proton Exchange Membrane Fuel Cells (PEMFCs) are considered one of the most promising clean energy technologies for the future. However, several challenges remain in their development, particularly the use of platinum (Pt) as a catalyst. Platinum is susceptible to activity loss under high-potential conditions of PEMFCs. Therefore, this study investigated the use of a ZIF-67/BP2000-derived PtCo/N-C catalyst to reduce Pt usage while enhancing catalytic performance. Pt(acac)₂ was employed as the Pt precursor, while cobalt nitrate hexahydrate and 2-methylimidazole were used as precursors for ZIF-67. The main variable in this study was the solvothermal synthesis temperature, which was varied at 200 °C, 180 °C, 160 °C, and 140 °C. Structural characterization was conducted using Scanning Electon Microscope (SEM), X-Ray Diffraction (XRD), and Fourier Transform Infrared (FTIR), while electrochemical performance was evaluated through Cyclic Voltammetry (CV), Linear Sweep Voltammetry (LSV), and single-cell testing. SEM results showed that increasing the solvothermal temperature to 200 °C led to greater catalyst surface agglomeration. XRD analysis revealed a shift in diffraction peaks compared to commercial Pt/C, indicating the formation of PtCo alloy structures. In addition, the largest crystallite size was observed for the PtCo/N-C catalyst synthesized at 200 °C, with a crystallite size of 11.63 nm. FTIR analysis identified the presence of O–H, CO₂, C=C, C=N, and Co–N functional groups, confirming the interaction between the ZIF-67-derived metal species and the BP2000 carbon support. Electrochemical characterization demonstrated that the PtCo/N-C catalyst synthesized at 140 °C exhibited the highest ECSA, reaching 78.842 m² mgPt⁻¹. LSV results further indicated that the same catalyst showed the most favorable oxygen reduction reaction (ORR) pathway, with an electron transfer number (n) of 3.920, suggesting a predominantly four-electron reduction mechanism. Single-cell testing, however, showed relatively poor performance for the PtCo/N-C catalyst synthesized at 180 °C, achieving a maximum power density of only 0.028 W cm⁻² and a current density of 0.114 A cm⁻², both of which remained inferior to those of commercial Pt/C. Overall, the results indicate that the PtCo/N-C 140 °C exhibited the best combination of electrochemical performance and morphological characteristics among the catalysts investigated in this study.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | PEMFC, ZIF-67, BP2000, Solvotermal Temperatur PEMFC, ZIF-67, BP2000, Solvothermal Temperature |
| Subjects: | Q Science > QD Chemistry > QD1 Oxidation-reduction reaction. Q Science > QD Chemistry > QD115 Electrochemical analysis Q Science > QD Chemistry > QD501 Catalysis. Catalysts. Q Science > QD Chemistry > QD569 Electrocatalysis. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2931 Fuel cells T Technology > TP Chemical technology > TP159.M6 Zeolites T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering |
| Depositing User: | Hafizh Muhammad Tsaqif |
| Date Deposited: | 27 Jul 2026 00:50 |
| Last Modified: | 27 Jul 2026 00:50 |
| URI: | http://repository.its.ac.id/id/eprint/137564 |
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Analisis Pengaruh Temperatur Solvotermal Terhadap Struktur Dan Performa Elektrokatalitik Katalis Ptco/Nc Berbasis Zif/BP2000 Untuk Aplikasi PEMFC. (deposited 24 Jul 2026 02:24)
- Analisis Pengaruh Temperatur Solvotermal Terhadap Struktur Dan Performa Elektrokatalitik Katalis Ptco/Nc Berbasis Zif/BP2000 Untuk Aplikasi PEMFC. (deposited 27 Jul 2026 00:50) [Currently Displayed]
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