Synthesis of Chromium Doped Cobalt Oxide (Cr:Co3O4) Nanoparticles by Co-Precipitation Method and Enhanced Photocatalytic Properties in the Visible Region

Hitkari, Gaurav; Sandhya, S.; Gajanan, P; Shrivash, Manoj Kumar; Kumar, Deepak

doi:10.4172/2169-0022.1000419

Cited by 10 publications

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“…For comparison, the band-gap of Mn-doped Co 3 O 4 is reported to be 1.51 eV [61], Sm-doped Co 3 O 4 is reported to be 3.57 eV [62], and Cr-doped Co 3 O 4 to be 2.44 eV [63]. The occurrence of a voltage plateau in GCD curves confirms the pseudocapacitance behavior of electrodes concerning their discharging period [31].…”

Section: (C)mentioning

confidence: 78%

“…The superior performance of the FexCo3-xO4 electrode results from the significant decrease in the band-gap upon Fe doping, as elucidated in the DFT study below. For comparison, the band-gap of Mn-doped Co3O4 is reported to be 1.51 eV [61], Sm-doped Co3O4 is reported to be 3.57 eV [62], and Cr-doped Co3O4 to be 2.44 eV [63]. The cyclic stability of Fe x Co 3-x O 4 electrodes was evaluated by repeated chargedischarge measurements up to 5000 cycles at a constant current density of 10 A/g in the potential range between 0.0 to 0.6 V in 3M KOH, as shown in Figure 8.…”

Section: (C)mentioning

confidence: 99%

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Electrochemical Performance of Iron-Doped Cobalt Oxide Hierarchical Nanostructure

et al. 2021

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In this study, hydrothermally produced Fe-doped Co3O4 nanostructured particles are investigated as electrocatalysts for the water-splitting process and electrode materials for supercapacitor devices. The results of the experiments demonstrated that the surface area, specific capacitance, and electrochemical performance of Co3O4 are all influenced by Fe3+ content. The FexCo3-xO4 with x = 1 sample exhibits a higher BET surface (87.45 m2/g) than that of the pristine Co3O4 (59.4 m2/g). Electrochemical measurements of the electrode carried out in 3 M KOH reveal a high specific capacitance of 153 F/g at a current density of 1 A/g for x = 0.6 and 684 F/g at a 2 mV/s scan rate for x = 1.0 samples. In terms of electrocatalytic performance, the electrode (x = 1.0) displayed a low overpotential of 266 mV (at a current density of 10 mA/cm2) along with 52 mV/dec Tafel slopes in the oxygen evolution reaction. Additionally, the overpotential of 132 mV (at a current density of 10 mA/cm2) and 109 mV with 52 mV/dec Tafel slope were obtained for x = 0.6 sample towards hydrogen evolution reaction (HER). According to electrochemical impedance spectroscopy (EIS) measurements and the density functional theory (DFT) study, the addition of Fe3+ increased the conductivity at the electrode–electrolyte interface, which substantially impacted the high activity of the iron-doped cobalt oxide. The electrochemical results revealed that the mesoporous Fe-doped Co3O4 nanostructure could be used as potential electrode material in the high-performance electrochemical capacitor and water-splitting catalysts.

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