Three-dimensional NiO/Co3O4@C composite for high-performance non-enzymatic glucose sensor

Highly sensitive detection of glucose at a novel non‐enzyme electrochemical sensing based on Mo‐doped CoO Nanosheets

“…This showed that appropriate amount of Mo doping can increase the proportion of oxygen vacancies and the number of available active sites, which will improve the electrochemical reaction rate. [46][47] In Mo 3d spectra (Figure 4d), the peak for Mo 6 + 3d 5/2 and Mo 6 + 3d 3/2 were at 232.26 and 235.37 eV, and the peak positioned at 233.08 eV and 236.26 eV should be attributed to Mo 6 + 3d 5/2 and Mo 6 + 3d 3/2 , in consistent with the vibrational peaks from Raman spectra. Based on the above XPS analysis, it can be concluded that the successful doping of Mo element in MoÀ CoO-1 endowed the material more defects and oxygen vacancy, benefiting the nearby Co(II) convert into Co(IV) during the electrochemical process and enhancing the electrochemical catalytic activity of the prepared material.…”

“…It can be clearly seen that the proportion of oxygen vacancy in Mo−CoO‐1 is 47 %, which is significantly increased compared with 34 % and 40 % of the other two samples. This showed that appropriate amount of Mo doping can increase the proportion of oxygen vacancies and the number of available active sites, which will improve the electrochemical reaction rate [46–47] . In Mo 3d spectra (Figure 4d), the peak for Mo 6+ 3d 5/2 and Mo 6+ 3d 3/2 were at 232.26 and 235.37 eV, and the peak positioned at 233.08 eV and 236.26 eV should be attributed to Mo 6+ 3d 5/2 and Mo 6+ 3d 3/2 , in consistent with the vibrational peaks from Raman spectra.…”