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TABLE5 _ Comparison between experimental and theoretical results obtained from ANN model

Table5 5 _ Comparison between experimental and theoretical results obtained from ANN model

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(PGSTAT30) using cyclic voltammetry. Cyclic voltamme- try was tested in an electrochemical cell containing the Ag/AgCl electrode as the reference, Pt wire as the coun- ter electrode and the electrode material grown on SS as the working electrode. Electrochemical performance was measured in 1 M KOH aqueous electrolyte at standard conditions.
(PGSTAT30) using cyclic voltammetry. Cyclic voltamme- try was tested in an electrochemical cell containing the Ag/AgCl electrode as the reference, Pt wire as the coun- ter electrode and the electrode material grown on SS as the working electrode. Electrochemical performance was measured in 1 M KOH aqueous electrolyte at standard conditions.
TABLE1 Artificial neural network model training parameters and structure
TABLE1 Artificial neural network model training parameters and structure
FIGURE 2 _ XRD patterns of (A) SS substrate, (B) ZnO NWs, (C) NiO and (D) MnO, and (E) MnO,/NiO/ZnO NWSs/SS tri- junction synthesized thin films
FIGURE 2 _ XRD patterns of (A) SS substrate, (B) ZnO NWs, (C) NiO and (D) MnO, and (E) MnO,/NiO/ZnO NWSs/SS tri- junction synthesized thin films
air, in the range of 4000 to 400 cm™*. In Figure 3A, the peaks at 447 and 889cm' are corresponding to Zn-O stretching and deformation vibration. Both peaks located at 1405 and 1620 cm™’ are due to O-H vibration and stretch- ing. From Figure 3B which attributed to the electrodepos- ited of NiO thin films onto SS substrate; we can see the Ni-O vibrational band peak appearing at 403 cm™', while the peak at 682 cm™! corresponds to a stretching Ni-O-H band. The peaks that appeared at 1391, 1535, and 1621 cm" attributed to O-H stretching and deformation. The above information confirmed the formation of NiO thin films might initially contain water. Bodurov G. et al. who have prepared NiO thin films by electrodeposition onto ITO coated glass substrate obtain the same result.™*
air, in the range of 4000 to 400 cm™*. In Figure 3A, the peaks at 447 and 889cm' are corresponding to Zn-O stretching and deformation vibration. Both peaks located at 1405 and 1620 cm™’ are due to O-H vibration and stretch- ing. From Figure 3B which attributed to the electrodepos- ited of NiO thin films onto SS substrate; we can see the Ni-O vibrational band peak appearing at 403 cm™', while the peak at 682 cm™! corresponds to a stretching Ni-O-H band. The peaks that appeared at 1391, 1535, and 1621 cm" attributed to O-H stretching and deformation. The above information confirmed the formation of NiO thin films might initially contain water. Bodurov G. et al. who have prepared NiO thin films by electrodeposition onto ITO coated glass substrate obtain the same result.™*
compact manner with nanowires about 150 nm. In addi- tion, the appearance of hexagonal shape agrees with the accurrence of the wortzite nolywmornh of ZnQ which stainless steel substrate are studied. Figure 4A, shows that the obtained ZnO nanowires are aligned perpendicu- lav tr tha ctainlacectaal canhetrata in a wnitnrm® and
compact manner with nanowires about 150 nm. In addi- tion, the appearance of hexagonal shape agrees with the accurrence of the wortzite nolywmornh of ZnQ which stainless steel substrate are studied. Figure 4A, shows that the obtained ZnO nanowires are aligned perpendicu- lav tr tha ctainlacectaal canhetrata in a wnitnrm® and
FIGURE 5 __ Typical EDX spectrum of MnO,/NiO/ZnO NWs trijunction electrodeposited onto stainless steel substrate
FIGURE 5 __ Typical EDX spectrum of MnO,/NiO/ZnO NWs trijunction electrodeposited onto stainless steel substrate
FIGURE 6_ Contact angle of stainless-steel substrate, ZnO NWs, NiO, MnO;, NiO/ZnO NWs and trijunction synthesized thin films
FIGURE 6_ Contact angle of stainless-steel substrate, ZnO NWs, NiO, MnO;, NiO/ZnO NWs and trijunction synthesized thin films
FIGURE7_ CVs for the various synthesized samples at a constant scan rate of 50 mV s_! two contributions to the electrode-solution interface: i) the capacitive current, linked to the charging and dis- charging processes of capacitive phenomena during the cyc e, and ii) the faradic current linked to oxidation and reduction processes.°” In this work, the electrochemical per formance of metal oxide thin films grown by electro- deposition method onto SS substrate are determined using CV measurements which were conducted in 1M KO H solution at a constant scan rate of 50mVs? (Figure 7). To subtract the influence of the substrate, CV measurements of blank stainless-steel substrate were also per formed with the same conditions.
FIGURE7_ CVs for the various synthesized samples at a constant scan rate of 50 mV s_! two contributions to the electrode-solution interface: i) the capacitive current, linked to the charging and dis- charging processes of capacitive phenomena during the cyc e, and ii) the faradic current linked to oxidation and reduction processes.°” In this work, the electrochemical per formance of metal oxide thin films grown by electro- deposition method onto SS substrate are determined using CV measurements which were conducted in 1M KO H solution at a constant scan rate of 50mVs? (Figure 7). To subtract the influence of the substrate, CV measurements of blank stainless-steel substrate were also per formed with the same conditions.
FIGURE 8 | Evolution of cyclic voltammetry curves of trijunction MnO,/NiO/ZnO NWs/SS electrode with scan rate range from 5 to 200 mV s_' To confirm this, CV measurements of the prepared rijunction supercapacitor electrode at various values of scan rates from 5 to 200 mVs _' were realized and are grouped in Figure 8. Whatever the scan rates (even at a high scan rate of 200 mV s~'), and in the whole range of he applied potential, a nearly rectangular shape is observed proving the enhanced capacitive behavior of the electrode with a fast charge-discharge rate. In addition, he symmetric shape in the potential range from —0.5 to 0.6 V indicates favorable electrochemical reversibility of rijunction electrode.”© With increasing scan rate, not
FIGURE 8 | Evolution of cyclic voltammetry curves of trijunction MnO,/NiO/ZnO NWs/SS electrode with scan rate range from 5 to 200 mV s_' To confirm this, CV measurements of the prepared rijunction supercapacitor electrode at various values of scan rates from 5 to 200 mVs _' were realized and are grouped in Figure 8. Whatever the scan rates (even at a high scan rate of 200 mV s~'), and in the whole range of he applied potential, a nearly rectangular shape is observed proving the enhanced capacitive behavior of the electrode with a fast charge-discharge rate. In addition, he symmetric shape in the potential range from —0.5 to 0.6 V indicates favorable electrochemical reversibility of rijunction electrode.”© With increasing scan rate, not
TABLE 2 __ Specific capacitance of prepared electrodes at different values of scan rate TABLE 3 _ Comparison of electrochemical performance of trijunction electrodes obtained in this work and other similar electrode reported previously
TABLE 2 __ Specific capacitance of prepared electrodes at different values of scan rate TABLE 3 _ Comparison of electrochemical performance of trijunction electrodes obtained in this work and other similar electrode reported previously
TABLE4 ANN model performance results
TABLE4 ANN model performance results
FIGURE 9 _ Cyclic voltammetry curves at various values of scan rate: 5, 10, 20, 30, 50,70, 100 and 200 mV s / obtained from three. electrode workstation and ANN model
FIGURE 9 _ Cyclic voltammetry curves at various values of scan rate: 5, 10, 20, 30, 50,70, 100 and 200 mV s / obtained from three. electrode workstation and ANN model
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