Anwar, Farid Miftahul (2025) Analisis Pengaruh mAC (modified Activated Carbon) dan HGNC (Highly Graphitized N-doped Carbon) sebagai Penyangga Katalis Platinum terhadap Kinerja Elektrokimia Proton Exchange Membrane Fuel Cell. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
PEMFC (Proton Exchange Membrane Fuel Cell) adalah sebuah instrumen pengkonversi gas reaktan menjadi energi listrik. Peran PEMFC sangat bergantung pada katalis di dalamnya. Penggunaan katalis yang umum adalah berupa platinum yang disupport oleh karbon. Penggunaan karbon sebagai support membuka banyak peluang material jenis karbon lain seperti karbon aktif. Dalam penelitian ini digunakan karbon aktif untuk menjadi material penyangga katalis platinum. Penelitian ini dilakukan dimulai dari sintesis karbon aktif dari tempurung kelapa. Selain platinum murni, digunakan juga platinum paduan kromium, untuk melihat potensi katalis jenis ini. Penelitian dilakukan melalui optimalisasi beberapa aspek pengujian elektrokimia, seperti jumlah siklus pengujian, loading platinum, rasio platinum, laju pemindaian, kondisi elektrolit pengujian temperatur pengujian, dan metode sintesis. Pt/HGNC memiliki kemampuan oksidasi hidrogen (142 m2/g) yang bisa melebihi Pt/C (95 m2/g) dan memiliki sifat reduksi oksigen yang sama dengan Pt/C (0.98 mA/cm2). Katalis Pt/CB mempunyai kemampuan oksidasi hidrogen sama seperti Pt/C (95 m2/g) namun kemampuan reduksi oksigennya (0.22 mA/cm2) masih di bawah Pt/C (0.98 mA/cm2). Katalis Pt/MWCNT mepunyai kemampuan oksidasi hidrogen (6 m2/g) yang rendah daripada Pt/C (95 m2/g) namun mempunyai kemampuan reduksi oksigen (1.29 mA/cm2) melebihi Pt/C (0.98 mA/cm2). Pada pengujian single cell, didapatkan terdapat peningkatan daya maksimum dari katalis Pt/raw CCS (0.064 W) menjadi Pt/rAC (0.248 W). Pt/rAC mempunyai daya maksimum yang mirip dengan karbon aktif komersil Pt/AC-m4 (0.253 W). Pt/mAC mempunyai daya maksimum lebih tinggi (0.443 W) daripada Pt/rAC. Daya maksimum paling tinggi dimiliki oleh Pt/CB (0.625 W). Setelah dilakukan optimalisasi pengujian single cell, didapatkan daya maksimum katalis Pt/AC-m4 (0.675 W), Pt/CB (1.077 W), dan Pt/MWCNT (1.045 W) lebih tinggi dibandingkan sebelum optimalisasi. Melalui pendekatan ini, katalis Pt/mAC kemungkinan mengalami peningkatan dalam daya maksimum yang bisa dihasilkan setelah optimalisasi. Untuk Pt/HGNC belum bisa menghasilkan arus listrik karena pada pengujian XRD, material ini berupa magnesium hidroksida bukan karbon seperti pada hipotesis.
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PEMFC (Proton Exchange Membrane Fuel Cell) is an instrument that converts reactant gas into electrical energy. The role of PEMFC is highly dependent on the catalyst inside it. The catalyst commonly used is platinum supported by carbon. The use of carbon as a support opens up many opportunities for other types of carbon materials such as activated carbon. In this study, activated carbon was used as a support material for the platinum catalyst. This research began with the synthesis of activated carbon from coconut shells. In addition to pure platinum, platinum-chromium alloys were also used to assess the potential of this type of catalyst. The research involved optimizing various aspects of electrochemical testing, including the number of testing cycles, platinum loading, platinum ratio, scanning rate, electrolyte conditions, testing temperature, and synthesis methods. Pt/HGNC has hydrogen oxidation capacity (142 m2/g) that can exceed Pt/C (95 m2/g) and has the same oxygen reduction properties as Pt/C (0.98 mA/cm2). The Pt/CB catalyst has the same hydrogen oxidation capacity as Pt/C (95 m²/g) but its oxygen reduction capacity (0.22 mA/cm²) is still below that of Pt/C (0.98 mA/cm²). The Pt/MWCNT catalyst has lower hydrogen oxidation capacity (6 m²/g) than Pt/C (95 m²/g) but higher oxygen reduction capacity (1.29 mA/cm²) than Pt/C (0.98 mA/cm²). In single-cell testing, there was an increase in maximum power from the Pt/raw CCS catalyst (0.064 W) to Pt/rAC (0.248 W). Pt/rAC has a maximum power similar to commercial activated carbon Pt/AC-m4 (0.253 W). Pt/mAC has a higher maximum power (0.443 W) than Pt/rAC. The highest maximum power was achieved by Pt/CB (0.625 W). After optimizing the single-cell testing, the maximum power of the Pt/AC-m4 catalyst (0.675 W), Pt/CB (1.077 W), and Pt/MWCNT (1.045 W) was higher than before optimization. Through this approach, the Pt/mAC catalyst is likely to experience an increase in the maximum power it can generate after optimization. For Pt/HGNC, it has not yet been able to generate an electric current because, in XRD testing, this material is magnesium hydroxide rather than carbon as hypothesized.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Carbon support, HGNC, karbon support, katalis platinum, mAC, PEMFC, platinum catalyst |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2931 Fuel cells |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 27101-(S2) Master Thesis |
| Depositing User: | Farid Miftahul Anwar |
| Date Deposited: | 05 Aug 2025 03:29 |
| Last Modified: | 05 Aug 2025 03:29 |
| URI: | http://repository.its.ac.id/id/eprint/125875 |
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