Analisis Pengaruh Waktu Elektrodeposisi Terhadap Performa Katalis Cocn@ni-foam Untuk Aplikasi Water Splitting

Syafaat, Tamam Ridho (2026) Analisis Pengaruh Waktu Elektrodeposisi Terhadap Performa Katalis Cocn@ni-foam Untuk Aplikasi Water Splitting. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pemisahan air melalui elektrolisis (water splitting) menjadi salah satu metode utama dalam menghasilkan hidrogen hijau sebagai energi terbarukan. Namun, katalis berbasis logam mulia seperti Pt, Ir, dan Ru dalam reaksi hydrogen evolution reaction (HER) dan oxygen evolution reaction (OER) masih menghadapi kendala biaya dan kelangkaan. Oleh karena itu, pengembangan katalis berbasis logam transisi seperti kobalt menjadi sangat penting. Penelitian ini bertujuan menganalisis pengaruh variasi waktu elektrodeposisi terhadap performa elektrokatalitik katalis CoCN@Ni-foam dalam reaksi HER dan OER serta mengevaluasi karakteristik struktur dan morfologi kristal yang terbentuk. Sintesis dilakukan melalui elektrodeposisi Co(OH)2 pada Ni-foam dengan variasi waktu 10, 15, 20, dan 30 menit, dilanjutkan konversi menjadi ZIF-67, dan karbonisasi pada 700°C menghasilkan CoCN@Ni-foam. Karakterisasi menggunakan XRD, FTIR, dan SEM-EDX. Pengujian elektrokimia dilakukan dengan Linear Sweep Voltammetry (LSV). Hasil XRD mengonfirmasi transformasi fasa dari Co(OH)₂ menjadi ZIF-67 dan CoCN dengan ukuran kristalit Co 7,98 nm. SEM menunjukkan waktu 15 menit menghasilkan lapisan tipis berpori dengan nanopartikel 50–100 nm, sedangkan waktu 30 menit menghasilkan lapisan lebih tebal dengan aglomerasi. LSV menunjukkan waktu 30 menit memberikan performa terbaik dengan overpotential HER 288 mV dan OER 351 mV pada 10 mA/cm², diikuti sampel 20 menit (308 mV dan 359 mV). Tafel slope terkecil HER diperoleh pada sampel 10 menit (121,3 mV/dec) dan OER pada sampel 20 menit (98,2 mV/dec). Perbandingan dengan katalis logam mulia Pt/C (28 mV) dan turunan ZIF-67 terfosforisasi CoNiP/NC-NF-40 (99 mV HER, 266 mV OER) menunjukkan bahwa CoCN@Ni-foam masih memerlukan optimasi lebih lanjut, seperti variasi suhu karbonisasi atau doping logam transisi, untuk meningkatkan aktivitas elektrokatalitiknya.
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Water splitting through electrolysis has emerged as one of the primary methods for producing green hydrogen as a renewable energy source. However, noble metal-based catalysts such as Pt, Ir, and Ru in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) still face obstacles in terms of cost and scarcity. Therefore, the development of transition metal-based catalysts such as cobalt has become critically important. This study aims to analyze the effect of electrodeposition time variations on the electrocatalytic performance of CoCN@Ni-foam catalyst in HER and OER reactions and to evaluate the structural characteristics and crystal morphology formed. The synthesis was conducted through electrodeposition of Co(OH)₂ on Ni-foam with time variations of 10, 15, 20, and 30 minutes, followed by conversion to ZIF-67, and carbonization at 700°C to produce CoCN@Ni-foam. Characterization was performed using XRD, FTIR, and SEM-EDX. Electrochemical testing was conducted using Linear Sweep Voltammetry (LSV). XRD results confirmed the phase transformation from Co(OH)₂ to ZIF-67 and CoCN with Co crystallite size of 7.98 nm. SEM showed that 15 minutes produced a thin porous layer with 50–100 nm nanoparticles, while 30 minutes produced a thicker layer with agglomeration. LSV results showed that 30 minutes provided the best performance with HER overpotential of 288 mV and OER of 351 mV at 10 mA/cm², followed by 20 minutes sample (308 mV and 359 mV). The smallest Tafel slope for HER was obtained at 10 minutes (121.3 mV/dec) and for OER at 20 minutes (98.2 mV/dec). Comparison with noble metal catalyst Pt/C (28 mV) and phosphorized ZIF-67 derivative CoNiP/NC-NF-40 (99 mV HER, 266 mV OER) indicates that CoCN@Ni-foam still requires further optimization, such as carbonization temperature variation or transition metal doping, to improve its electrocatalytic activity.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Water Splitting, HER, OER, Katalis, Elektrodeposisi,Water Splitting, HER, OER, Catalyst, Electrodeposition
Subjects:	Q Science > QD Chemistry > QD115 Electrochemical analysis Q Science > QD Chemistry > QD501 Catalysis. Catalysts. Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis Q Science > QD Chemistry > QD569 Electrocatalysis. 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 > 28201-(S1) Undergraduate Thesis
Depositing User:	Tamam Ridho Syafaat
Date Deposited:	27 Jul 2026 01:26
Last Modified:	27 Jul 2026 01:26
URI:	http://repository.its.ac.id/id/eprint/137532

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