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<p>In the present study, a simple hydrothermal method is used to prepare nickel oxide (NiO) and cerium-doped nickel oxide (Ce-NiO) nano-plates-based electrodes. The surface area is examined to be 146 m<sup>2</sup>/g and 207 m<sup>2</sup>/g with mean pore size of 17.68&#xa0;nm and 25.77&#xa0;nm for NiO and Ce-NiO electrodes. The development of redox peaks only related to NiO indicates that the contribution of CeO mixed phases during the electrochemical process is smaller at all scan rates. The specific capacitance of 2717 F/g and 4045 F/g at 2 A/g is simulated for NiO and Ce-NiO electrodes with average surface roughness of 294 and 417 and capacitance stability of 84 and 94% for 9000 cycles. The simulated constant “b” values including 0.93, 0.83, and 0.73 of NiO are smaller than b values 1.05, 1.17, and 1.08 of Ce-NiO electrode. The NiO is a suitable electrode for both supercapacitor and rechargeable batteries; however, Ce-NiO is supportive only for capacitor. The maximum pseudocapacitive contribution ~ 85% of NiO is smaller than pseudocapacitive contribution ~ 91% of Ce-NiO electrode. The NiO absorbance ~ 0.44 is increased to ~ 0.77 by Ce dopant representing excellent optical properties of Ce-NiO nanomaterials. The optical energy band gap is also decreased 2.79–2.39&#xa0;eV by Ce dopant in NiO lattice. The prepared nanomaterials are suitable for energy conversion and energy storage applications.</p>

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Effect of cerium doping on optical and electrochemical properties of nickel oxide nanostructures

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Shahid Iqbal,
  • Ibrahim K. Alsulami,
  • Norah Algethami,
  • M. S. Al-Buriahi,
  • Asif Raza

摘要

In the present study, a simple hydrothermal method is used to prepare nickel oxide (NiO) and cerium-doped nickel oxide (Ce-NiO) nano-plates-based electrodes. The surface area is examined to be 146 m2/g and 207 m2/g with mean pore size of 17.68 nm and 25.77 nm for NiO and Ce-NiO electrodes. The development of redox peaks only related to NiO indicates that the contribution of CeO mixed phases during the electrochemical process is smaller at all scan rates. The specific capacitance of 2717 F/g and 4045 F/g at 2 A/g is simulated for NiO and Ce-NiO electrodes with average surface roughness of 294 and 417 and capacitance stability of 84 and 94% for 9000 cycles. The simulated constant “b” values including 0.93, 0.83, and 0.73 of NiO are smaller than b values 1.05, 1.17, and 1.08 of Ce-NiO electrode. The NiO is a suitable electrode for both supercapacitor and rechargeable batteries; however, Ce-NiO is supportive only for capacitor. The maximum pseudocapacitive contribution ~ 85% of NiO is smaller than pseudocapacitive contribution ~ 91% of Ce-NiO electrode. The NiO absorbance ~ 0.44 is increased to ~ 0.77 by Ce dopant representing excellent optical properties of Ce-NiO nanomaterials. The optical energy band gap is also decreased 2.79–2.39 eV by Ce dopant in NiO lattice. The prepared nanomaterials are suitable for energy conversion and energy storage applications.