Paduan Ternari Basis Pd dengan Kemampuan Reaksi Oksidasi Metanol Tinggi untuk Aplikasi Sel Bahan Bakar Metanol

Pradesar, Yusuf (2016) Paduan Ternari Basis Pd dengan Kemampuan Reaksi Oksidasi Metanol Tinggi untuk Aplikasi Sel Bahan Bakar Metanol. Masters thesis, Institut Technology Sepuluh Nopember.

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Abstract

Suplai energi merupakan kebutuhan mendesak bagi masyarakat di abad 21 ini karena krisis energi fosil yang tidak terbarukan. Sehingga,, pengadaan energi baru yang layak, seperti sel bahan bakar, telah menarik perhatian para peneliti. Sel bahan bakar temperatur rendah sesuai untuk aplikasi kendaraan dan portable karena densitas energinya yang tinggi, temperatur kerja rendah, dan rendah emisi polusi. Untuk meningkatkan aktivitas elektrokatalitik katalis mono-Pd, banyak penelitian yang memodifikasi Pd dengan memadukannya. Dalam penelitian ini, karbon hitam XC-72 digunkan sebagai material support dan Pd(acac)2 sebagai precursor logam Pd. Untuk mensintesis elektrokatalis, metode emulsi digunakan sebagai prosedur eksperimen. Benzil alcohol digunakan sebagai larutan dan campuran oleylamine dan asam oleic sebagai reduktor. Dalam penelitian ini, pengaruh parameter eksperimental diteliti. Rasio antara volume reduktor dengan volume keseluruhan 0.5, 0.3, dan 0.1; dan temeperature reduksi 110, 130, dan 150 oC dipilih untuk meningkatkan aktivitas katalitiknya. Faktor lain yang memepengaruhi aktivitas katalitik adalah elemen paduan. Fe, Co, dan Ni digunakan sebagai elemen paduan. Pengujian XRD, SEM dan TEM dilakukan untuk mengetahui sifat fisik elektrokatalis. Pengukuran CV dilakukan untuk mengetahui sifat elektrokimia dalam larutan 1 M KOH dan 1 M KOH + 1 M methanol. Hasil penelitian menunjukkan bahwa volume rasio 0.1 dan temperatur reduksi 150 oC merupakan parameter eksperimental terbarik untuk mensisntesis paduan logam ternary basis Pd. PdFeCo/C merupakan paduan logam ternary yang memiliki aktivitas katalitik dan stabilitas terhadap methanol terbaik. ========================================================================================================= Energy supply is an urgent need for society in this 21st century due the crisis of fossil fuels. Therefore, development new feasible energy, such as fuel cells, has drawn research interest. Low temperature fuel cells are suitable for transportation and portable application because of their high energy density, low operation temperature and low pollution emissions. To improve the electrocatalytic activity of mono-Pd catalyst, most of the work has addressed to the modification of Pd environment by alloying with other elements. In this study, XC72 was used as carbon support and Pd(acac)2 as Pd metal precursor. For preparing the electrocalysts, emulsion method was used as experimental procedure. Benzyl alcohol was used as solution, and oleylamine and oleic acid was used as reducing agent and surfactant. In this study, effect of experimental parameter was studied. Volume ration between reducing agent and total volume 0.5, 0.3, 0.1; and reduction temperature 110, 130, and 150 oC was considered for improving the catalytic activity. Another factor would affect the catalytic activity was alloying elements. There were Fe, Co, and Ni that used as alloying elements. XRD, SEM, and TEM were conducted to study the physical properties of electrocatalysts. CV measurement was conducted to study the electrochemical properties in 1 M KOH and 1 M KOH + 1 M methanol. The results showed that the volume ratio 0.1 and reduction temperature 150 oC was the best experimental parameter for synthesized Pd-based ternary alloy. PdFeCo/C was ternary alloy that had the best catalytic activity and good stability toward MOR.

Item Type: Thesis (Masters)
Additional Information: RTMt 669.94 Pra p-1
Uncontrolled Keywords: DMFC, Pd-based, ternary alloy
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2931 Fuel cells
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > 27101-(S2) Master Thesis
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 17 Feb 2020 06:52
Last Modified: 17 Feb 2020 06:52
URI: https://repository.its.ac.id/id/eprint/74986

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