Pengaruh Reduktor Zink pada Sintesis Graphene terhadap Performa PdAu/Graphene sebagai Material Elektrokatalis DMFC

Frizka Vietanti, Diah Susanti, Hariyati Purwaningsih, Fredy Kurniawan

Abstract


Sel bahan bakar adalah peralatan elektrokimia yang mengubah energi kimia dalam bahan bakar secara
langsung menjadi energi listrik. Direct Methanol Fuel Cell (DMFC) merupakan jenis sel bahan bakar yang
menarik perhatian karena menghasilkan densitas energi yang tinggi dan menggunakan jenis bahan bakar
cair yaitu metanol. Saat ini katalis berbasis Palladium (Pd) yang didepositkan pada elektroda berbasis
karbon memainkan peranan penting untuk menggantikan Platina (Pt)/C karena cadangan terbatas, harga
mahal, dan ketidakstabilan dalam operasi sebagai material elektrokatalis DMFC. Graphene sebagai material
baru untuk elektroda DMFC telah terbukti dapat meningkatkan performa DMFC. Faktor keberhasilan
reduksi graphene oxide menjadi graphene dipengaruhi oleh reduktor zink (Zn). Dalam penelitian ini
diberikan variasi massa reduktor Zn senilai 0.8, 1.6, dan 2.4 gram. Metode sputtering diaplikasikan untuk
mendepositkan nanopartikel PdAu pada graphene. Dari hasil pengujian scanning electron microscopy
(SEM) dan X-ray diffraction (XRD), reduktor Zn senilai 1.6 gram menunjukkan performa terbaik. Pada
pengujian elektrokimia dengan menggunakan cyclic voltammetry (CV) diperoleh densitas arus sebesar 80
mA/g dan potensial onset sebesar -0.58 V vs. Ag/AgCl.


Keywords


DMFC, elektrokatalis;graphene;logam berbasis Pd;reduktor Zn

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