Electrochemical energy storage by nanosized MoO3/PdO material: Investigation of its structural, optical and electrochemical properties for supercapacitor

Abstract

The lower cost and greener synthesis of metal oxides nanomaterial is highly investigated for efficient electrochemical devices. In this regard, we have synthesized facile MoO3/PdO NPs by sol gel synthesis method using extracted foliar fuel of E. cognata. The phase analysis of MoO3/PdO was carried out by X-ray diffraction whereas nanostructures were observed by electron microscopy-FESEM. The foliar fuel introduced functional groups were revealed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The Tauc plot revealed low optical band gap energy of MoO3/PdO to 2.55 eV which could be favorable for its electrochemical properties. Henceforth organic framework derived MoO3/PdO nanomaterial was scrutinized by electrochemical characterizations to evaluate the capacitance, electronic and ionic conducting behavior. The specific capacitance of 127 F/g with low internal resistance of 1.9 Ω was observed in the current study, suggesting the moderate supercapacitor potential with efficient diffusion of electrons and ions. Therefore, good electrochemical behavior of MoO3/PdO nanomaterial was revealed, which was further demonstrated by prominent redox behavior via cyclicvoltammetry and galvanostatic charge-discharge.