Pada penelitian ini dilakukan sintesis nanokomposit NiFe2O4 mesopori dengan MWCNT sebagai elektrokatalis dalam reaksi evolusi hidrogen. Berdasarkan hasil karakterisasi FTIR, XRD, Raman, TEM, SEM, dan BET menunjukkan NiFe2O4 mesopori, MWCNT, dan NiFe2O4 mesopori/MWCNT telah berhasil disintesis. Material-material hasil sintesis ini kemudian didepositkan pada permukaan elektroda glassy carbon (GCE) dan perilaku elektrokimianya diuji dengan teknik LSV, ECSA, EIS dan kronoamperometri. Pengujian menggunakan teknik LSV menunjukkan bahwa nilai onset potensial, overpotensial, dan tafel slope GCE/NiFe2O4 mesopori/MWCNT lebih kecil di bandingkan GCE/NiFe2O4 mesopori dan GCE/MWCNT. Hasil ini berkolerasi dengan uji ECSA yang menunjukkan bahwa GCE/NiFe2O4 mesopori/MWCNT memiliki luas permukaan yang paling tinggi sebesar 38,75 cm2. Sedangkan pengujian dengan teknik EIS menunjukkan bahwa nilai hambatan transfer muatan (R
In this research, the synthesis of mesoporous NiFe2O4 nanocomposites was carried out using MWCNT as an electrocatalyst in the hydrogen evolution reaction. Based on the results of FTIR, XRD, Raman, TEM, SEM, and BET characterization, it was shown that mesoporous NiFe2O4, MWCNT, and mesoporous NiFe2O4/MWCNT had been successfully synthesized. The synthesized materials were then deposited on the surface of glassy carbon (GCE) electrodes. Their electrochemical behavior was tested using LSV, ECSA, EIS and chronoamperometric techniques. Tests using the LSV technique showed that the values of onset potential, overpotential, and tafel slope GCE/mesoporous NiFe2O4/MWCNT were smaller than GCE/ mesoporous NiFe2O2 and GCE/MWCNT. These results correlate with the ECSA test, which shows that GCE/mesoporous NiFe2O4/MWCNT has the highest surface area of 38.75 cm2. Meanwhile, the EIS technique showed that the smallest charge transfer resistance (Rct) was 2.39 kΩ. A stability test using the chronoamperometric method showed that GCE/mesoporous NiFe2O4/MWCNT had good stability after 21,600 seconds of chronoamperometry. |
S-Putri Permata Puspita Dewi.pdf :: Unduh