Few‐layer graphene coated on indium tin oxide electrodes prepared by chemical vapor deposition and their enhanced glucose electrooxidation activity

Abstract

At present, few‐layer graphene is deposited on copper (Cu) foil by chemical vapor deposition (CVD) method. Then, the few‐layer graphenes produced on the Cu foil are coated onto the indium tin oxide (ITO) electrode to investigate their glucose electrooxidation activities. Hexane and hydrogen flow rate and deposition time parameters with CVD method are examined on different Cu foils. These electrodes are characterized by scanning electron microscopy‐energy dispersive X‐ray analysis (SEM‐EDX), X‐ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Furthermore, glucose electrooxidation is examined with cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) measurements. One could note that the graphene network is clearly visible from SEM images. The deconvoluted XPS spectrum indicates that carbon appeared in the form of non‐oxygenated ring C atoms for few‐layer graphene. The few‐layer graphene structure is confirmed by Raman analysis. Few‐layer graphene/ITO produced at 5 sccm Hexane and 50 sccm hydrogen flow rate and 20 minutes deposition time (G7/ITO) reveals the best electrode activity. The specific activity of G7/ITO electrode is obtained as 6.58 mA cm−2. According to CV, CA, and EIS results, G7/ITO electrode has high electrocatalytic activity, stability, and resistance in comparison with other electrodes.

Indole‐based novel organic anode catalyst for glucose electrooxidation

“…In order to increase the activity and energy density in glucose electrooxidation, it is important to develop catalysts made to have a high catalytic effect. In the literature, few‐layer graphene/ITO, 41 N‐doped few‐layer graphene/ITO, 42 Pt‐graphene/ITO, 37 Pd‐N doped‐G/ITO, 43 and also the catalysts given in Table 1 were studied to increase glucose electrooxidation. Ozok et al 12 specified that the benzothiophene organic catalyst indicated catalytic activity for glucose electrooxidation reaction.…”

Carbon Nanotube Supported CdM(S, Se)/CdTe Anode Catalysts for Electrooxidation of Glucose in Alkaline Media

“…Glucose oxidation has been realized as an electrochemical sensor for the control and rapid diagnosis of initial diabetes. [15][16][17][18][19] Researchers have shown that when glucose is fed into direct fuel cells, it produces 24 electrons. However, it is difficult to break and oxidize since glucose has a very stable molecule.…”

“…Glucose is an abundant monosaccharide in nature. Glucose oxidation has been realized as an electrochemical sensor for the control and rapid diagnosis of initial diabetes [15–19] . Researchers have shown that when glucose is fed into direct fuel cells, it produces 24 electrons.…”

Remarkable bismuth-gold alloy decorated on MWCNT for glucose electrooxidation: the effect of bismuth promotion and optimization via response surface methodology

“…Glucose electrooxidation (GAEO) to gluconic acid reactions are given as follows [23,24] (3) The development of anode catalysts with high GAEO activity is crucial for the commercialization of the direct glucose fuel cell. Hence, the anode catalyst performance of Fe 15 Pt 85 [25], Ni-Fe [26], Ni-Co [27], Au [28], Pt [29], G-ITO [30], AgNi [31], Pd [32], FeCo 2 O 4 [33], and Pd-Au [34] nanocatalysts have been investigated for direct GA fuel cells (DGFC). For instance, Chai et al reported that Pd 3 Cu-B/C nanocatalyst synthesized by a simple aqueous phase approach method had high GAEO activity and stability for GAEO reaction in fuel cell [35].…”