LaFeO₃ Modified RuO₂ for Enhancing Electrochemical Performances

Abstract:

LaFeO₃ nanoparticles-modified RuO₂ and RuO₂ samples 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 RuO₂ and RuO₂-LaFeO₃ samples are mainly a rutile structure. Compared with the RuO₂ sample, the RuO₂-LaFeO₃ sample has smaller crystalline grain size. Cyclic voltammetry analysis shows the voltammetric behaviour and the characteristic potentials of the RuO₂ and the RuO₂-LaFeO₃ samples are similar in 1.0 M KOH solution. Voltammetric charge analysis reveals that the RuO₂-LaFeO₃ sample has higher concentrated of surface active species and larger exposed surface area than the RuO₂ sample. Capacitive measurement results show the Double-layer capacitance (C_dl) and the electrochemical surface area (ECSA) values of the RuO₂-LaFeO₃ sample are approximately 2 times larger than those of the RuO₂ sample, indicating that the electrochemical active surface area increase when integrating of RuO₂ with LaFeO₃ nanoparticles.

• Periodical: Materials Science Forum (Volume 1013)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1013.3
• Online since: October 2020
• Authors: Shuai Li, Zhi Gang Zhang, Xin Yuan Chen, Xiao Yu Jiang*
• Keywords: Electrocatalyst, LaFeO₃ Nanoparticles Modified, Ruthenium Dioxide

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