LaFeO<sub>3</sub> Modified RuO<sub>2</sub> for Enhancing Electrochemical Performances

LaFeO3nanoparticles-modified RuO2and RuO2samples were fabricated by a thermal decomposition and was characterized by powder X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS) and cyclic voltammetry tests. XRD results reveal that the RuO2and RuO2-LaFeO3samples are mainly a rutile structure. Compared with the RuO2sample, the RuO2-LaFeO3sample has smaller crystalline grain size. Cyclic voltammetry analysis shows the voltammetric behaviour and the characteristic potentials of the RuO2and the RuO2-LaFeO3samples are similar in 1.0 M KOH solution. Voltammetric charge analysis reveals that the RuO2-LaFeO3sample has higher concentrated of surface active species and larger exposed surface area than the RuO2sample. Capacitive measurement results show the Double-layer capacitance (Cdl) and the electrochemical surface area (ECSA) values of the RuO2-LaFeO3sample are approximately 2 times larger than those of the RuO2sample, indicating that the electrochemical active surface area increase when integrating of RuO2with LaFeO3nanoparticles.