Electrochemical study of novel composite electrodes based on glassy carbon bulk-modified with Pt and MoO2 nanoparticles supported onto multi-walled carbon nanotubes

Jelena Čović, Aleksandra Zarubica, Aleksandar Bojić, Teodora Troter, Marjan Ranđelović

Abstract


This paper reports preparation and electrochemical study of new glassy carbon electrode (GCE) bulk-modified with synthesized hybrid materials: Pt and MoO2 nanoparticles deposited on the multi-walled carbon nanotubes (MWCNTs). The results of electrochemical study of commercial glassy carbon and electrodes modified with Pt- and MoO2-MWCNT were obta­ined by cyclic voltammetry in K4Fe(CN)6 and NaOH solutions. The morpho­logy and structure of synthesized hybrid materials were analysed using the method of high resolution transmission electron microscopy (HRTEM) indi­ca­t­ing the presence of well dispersed nanoparticles of Pt and MoO2 over MWCNT network. The results of electrochemical study show that the capa­ci­tance of electrode modified with MoO2-MWCNT and Pt-MWCNT is about 62-65 times higher than the capacitance of the commercial glassy carbon electrode.


Keywords


Multi-walled carbon nanotubes; platinum; molybdenum dioxide; cyclic voltammetry

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DOI: https://doi.org/10.2298/JSC200221043C

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