Background:
Non-enzymatic direct glucose biofuel cell is a promising technology to
harness sustainable renewable energy. Furthermore, monitoring glucose levels is essential for human
lives with age. Thus, there is an increasing need to develop highly efficient and stable modified electrodes.
Methods:
This study reported the manufacture of gold nanoparticles/polyaniline/modified gold electrodes
(Au NPs/PANI/Au electrode) based on the electrochemical polymerization method followed
by the deposition of gold nanoparticles. The shapes and chemical constitution of the electrodes were
examined by using different techniques including SEM, FTIR, XRD, EDS, and Raman spectroscopy
techniques. The electrocatalytic efficiency of the present electrodes toward direct glucose oxidation
was evaluated by applying cyclic voltammetry, linear sweep voltammetry, and square wave voltammetry
techniques.
objective:
fabrication of stable modified electrodes
uses of the modified electrodes for renewable energy
Results:
The results exhibited high electrocatalytic performance for direct glucose electrooxidation
in alkaline media. The modified electrodes show the ability to electrooxidation of various glucose
concentrations (1 μM ̶ 100 μM) with a limit of detection and limit of quantitation of 140 nM and 424
nM, respectively. Furthermore, the Au NPs/PANI/Au electrode showed higher durability, sensitivity,
and selectivity toward glucose oxidation than the Au NPs/ Au electrode, which confirmed the role of
the PANI layer in enhancing the stability of the modified electrode.
Conclusion:
Moreover, the molar fraction of glucose to KOH has a crucial role in the output current.
Hence, the modified electrodes are great candidates for direct glucose biofuel cell application.
result:
The electrocatalytic efficiency of the present electrodes toward direct glucose oxidation was evaluated by applying the cyclic voltammetry technique. The results exhibited high electrocatalytic performance for direct glucose electrooxidation in alkaline media. The modified electrodes show the ability to electrooxidation of various glucose concentrations (0.125M-2M). Furthermore, the Au NPs/PANI/Au electrode showed higher durability toward glucose oxidation than the Au NPs/ Au electrode, which confirmed the role of the PANI layer in enhancing the stability of the modified electrode. Moreover, the molar fraction of glucose to KOH has a crucial role in the output current.
