Solvothermal synthesis and electrochemical properties of octahedral cobalt oxide decorated with Ag2O

Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co3O4composite thin film electrode material

“…3,10,15,35 The additional redox pair of the Ag/Co-Co 3 O 4 /NF thin film electrode (A1 [0.29 V], C1 [0.12 V]) which indicates the incorporation of Ag into Co-Co 3 O 4 is from the redox reaction of Ag/Ag + as shown by Equation (3). 15,36,37 This observation compliments the EDX analysis confirming the presence of Ag.…”

“…Similarly, the redox pair (A3 [0.47 V], C3 [0.36 V]) is also attributed to the redox reaction of Co 3+ /Co 4+ according to Equation () 3,10,15,35 . The additional redox pair of the Ag/Co‐Co 3 O 4 /NF thin film electrode (A1 [0.29 V], C1 [0.12 V]) which indicates the incorporation of Ag into Co‐Co 3 O 4 is from the redox reaction of Ag/Ag + as shown by Equation () 15,36,37 . This observation compliments the EDX analysis confirming the presence of Ag. In addition, it can be noticed that there is a peak shift in the oxidation peaks toward higher potential and reduction peaks toward lower potential in all the electrodes as the scan rate increases (Figure 4A‐C).…”

“…This observation compliments the EDX analysis confirming the presence of Ag. In addition, it can be noticed that there is a peak shift in the oxidation peaks toward higher potential and reduction peaks toward lower potential in all the electrodes as the scan rate increases (Figure 4A‐C). This is as a result of limited charge transfer to satisfy electronic neutralization during the redox reaction caused by the increase in the diffusion resistance of the electrolyte ions within the electrodes 3,36,38,39 . Comparing the CV curves of the NF, Co‐Co 3 O 4 /NF, and Ag/Co‐Co 3 O 4 /NF electrodes in Figure 4C, the Ag/Co‐Co 3 O 4 /NF electrode exhibit a higher CV area which indicates a larger storage capacity.…”

“…EDX, energy-dispersive X-ray spectroscopy; SEM, scanning electron microscopereduction peaks toward lower potential in all the electrodes as the scan rate increases (Figure4A-C). This is as a result of limited charge transfer to satisfy electronic neutralization during the redox reaction caused by the increase in the diffusion resistance of the electrolyte ions within the electrodes 3,36,38,39. Comparing the CV curves of the NF, Co-Co 3 O 4 /NF, and Ag/Co-Co 3 O 4 /NF electrodes in Figure 4C, the Ag/Co-Co 3 O 4 /NF electrode exhibit a higher CV area which indicates a larger storage capacity.…”

Synthesis of a visible-light-driven Ag2O–Co3O4 Z-scheme photocatalyst for enhanced photodegradation of a reactive yellow dye

“…1 at 2 θ = 19.1°, 31.8°, 38.7°, 44.8°, 48.6°and 65.2° indexed to (111), (220), (222), (400), (551) and (440) hkl planes are representative peaks of the FCC phase of Co 3 O 4 (JCPDS 42-1476). 41–46 Additional diffraction peaks in the XRD pattern of Ag 2 O–Co 3 O 4 at 2 θ = 38.4°,and 65.4° indexed to (002) and (113) planes correspond to Ag 2 O. 47–53 It was observed that the incorporation of Ag 2 O reduced and shifted the characteristic peak of Co 3 O 4 .…”