A ternary nanooxide NiO-TiO2-ZrO2/SO42- as efficient solid superacid catalysts for electro-oxidation of glucose

A ternary composite of NiO and TiO2-ZrO2/SO42- solid superacid were synthesized and investigated as efficient anode catalysts for glucose electrooxidation. From X-ray diffraction (XRD) and scanning electron microscope (SEM), the precursors were found to convert into corresponding nanooxides. They were well dispersed with a size of approximate 70 nm. The nanostructure was also analyzed by fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The results showed that NiO-TiO2ZrO2 nanooxides were modified by SO42- and solid superacid NiO-TiO2-ZrO2/SO42- have been synthesized. The electrochemical measurements indicated that, compared with NiO, the current density of NiO-TiO2-ZrO2/SO42- modified GC electrode increased 27% in 0.1 M NaOH solution with 10 mM glucose. Moreover, the kinetic results showed that the glucose electrooxidation on NiO-TiO2-ZrO2/SO42- is a surface controlling process. In a word, NiO-TiO2-ZrO2/SO42- nanoparticles possessed high catalytic activity and good stability in alkaline medium for glucose oxidation reaction (GOR). (C) 2016 Elsevier Ltd. All rights reserved.