Analisis Pengaruh Rasio CB:RGO dan Post-treatment pada Elektrokatalis Berbasis Pt terhadap Performa Elektrokimia PEMFC

Pratama, Aurel Nico Putra (2024) Analisis Pengaruh Rasio CB:RGO dan Post-treatment pada Elektrokatalis Berbasis Pt terhadap Performa Elektrokimia PEMFC. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proton Exchange Membrane Fuel Cell (PEMFC) adalah teknologi sel bahan bakar yang menjanjikan untuk aplikasi transportasi dan pembangkit listrik. Kinerja PEMFC sangat dipengaruhi oleh katalis elektroda, yang bertanggung jawab untuk reaksi reduksi oksigen. Katalis Pt/C adalah katalis ORR yang paling efektif, tetapi harganya lumayan mahal dan cenderung mengalami degradasi. Carbon black (CB) dipilih karena konduktivitas listrik yang tinggi, memfasilitasi transfer elektron antara katalis dan elektroda, struktur poros carbon black memberikan luas area permukaan yang besar, memungkinkan distribusi homogen katalis di seluruh substrat. Reduced Graphene Oxide (rGO) digunakan dalam penelitian karena konduktivitas listrik yang tinggi dan luas permukaan yang besar, rGO menjadi salah satu kandidat potensial dalam upaya pengembangan teknologi sel bahan bakar yang lebih canggih. Post-treatment pada penelitian ini berfungsi sebagai surface cleanser yang diharapkan dapat menghilangkan gugus fungsional oksigen pada permukaan GO. Penelitian ini bertujuan untuk mengkaji pengaruh rasio CB:rGO dan post-treatment pada elektrokatalis berbasis Pt terhadap kinerja elektrokimia PEMFC. Elektrokatalis Pt/CB-rGO dengan rasio CB:rGO 1:1, 1:2, dan 1:3 serta dengan perlakuan post-treatment menggunakan furnace pada temperatur 200, 400, dan 700°C yang selanjutnya dikarakterisasi menggunakan teknik XRD dan FTIR. Kinerja elektrokimia PEMFC diukur menggunakan pengujian CV, LSV, dan Single Cell. Hal ini didukung dengan hasil XRD yang menunjukkan hilangnya puncak kristalin C (002) pada 2θ= 26,3° yang mengindikasikan oksidasi graphene dan terdapat puncak Pt (111) pada 2θ=39,6°, yang menegaskan bahwa proses sintesis menunjukkan keberhasilan dalam reduksi Pt pada carbon support dan proses reduksi GO menjadi rGO. Katalis Pt/CB-rGO dengan rasio carbon support 1:3 dan post-treatment 400°C menunjukkan hasil yang baik dengan nilai ECSA 104,75 m² g⁻1 dan kerapatan daya sebesar 204,34 mW/cm2. Dalam aplikasinya, katalis ini dioptimalkan dengan sistem asimetris dengan sisi anoda menggunakan Pt/CB-3rGO 400 dan sisi katoda menggunakan Pt/C yang hasilnya kerapatan daya naik menjadi 268,6 mW/cm2.
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Proton Exchange Membrane Fuel Cell (PEMFC) is a promising fuel cell technology for transportation and power generation applications. The performance of PEMFC is highly influenced by the electrode catalyst, which is responsible for the oxygen reduction reaction (ORR). Pt/C catalysts are the most effective ORR catalysts, but they are relatively expensive and prone to degradation. Carbon black (CB) is chosen for its high electrical conductivity, facilitating electron transfer between the catalyst and the electrode. The porous structure of carbon black provides a large surface area, allowing for a homogeneous distribution of the catalyst across the substrate. Reduced Graphene Oxide (rGO) is used in this study due to its high electrical conductivity and large surface area, making it a potential candidate for the development of advanced fuel cell technology. The post-treatment in this study serves as a surface cleanser, expected to remove oxygen functional groups from the GO surface. This research aims to investigate the effect of the CB:rGO ratio and post-treatment on Pt-based electrocatalysts for the electrochemical performance of PEMFC. Pt/CB-rGO electrocatalysts with CB:rGO ratios of 1:1, 1:2, and 1:3, and post-treatment using a furnace at temperatures of 200, 400, and 700°C were characterized using XRD and FTIR techniques. The electrochemical performance of PEMFC was measured using CV, LSV, and single cell tests. The XRD results supported these findings by showing the disappearance of the crystalline C (002) peak at 2θ = 26,3°, indicating graphene oxidation, and the presence of the Pt (111) peak at 2θ = 39,6°, confirming the successful reduction of Pt on the carbon support and the reduction of GO to rGO. The Pt/CB-rGO catalyst with a carbon support ratio of 1:3 and post-treatment at 400°C demonstrated good performance with an ECSA value of 104,75 m² g⁻¹ and a power density of 204,34 mW/cm². In its application, this catalyst was optimized with an asymmetric system, using Pt/CB-3rGO 400 on the anode and Pt/C on the cathode, resulting in an increased power density of 268,6 mW/cm².

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Elektrokatalis, Post-treatment, PEMFC, Rasio CB:rGO, Electrocatalyst, CB:rGO ratio
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD171.75 Climate change mitigation T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage. T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. T Technology > TP Chemical technology > TP159.M4 Membranes (Technology) T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Aurel Nico Putra Pratama
Date Deposited:	05 Sep 2024 02:42
Last Modified:	05 Sep 2024 02:42
URI:	http://repository.its.ac.id/id/eprint/111993

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