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Design of Multilayer Photoanodes for the Photoelectrochemical Water Splitting

Mokhtari, Hamed | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57787 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Taherinia, Davood
  7. Abstract:
  8. Global warming and the excessive carbon dioxide emissions from the use of fossil fuels have created many problems for the Earth’s climate. One way to deal with this problem is to convert the photoelectrochemical conversion of water molecules into hydrogen gas, which does not enter the environment due to te burning of pollution, but due to the poor syntheetics of water oxidation in the water fisssions process, this reaction determines the speed and needto be examined to improve the water fissions process.The study examined and reported the two – stage synthesis of Fe2O3@NiCo2O4 as an advanced photoelectrocatalyst for water oxidation in the pH environment of the game. Hematite semiconductor was used to improve electrocatalyst reaction properties by inducing cavities formed by light radiation. This semiconductor was synthesized by hydrothermal method, and nickel and cobalt spinel were doped by electrochemical and calcine deposition on hematit. The morphology of compounds made at each stage was identifies by X – Ray Diffraction method (XRD), Scanning Electron Microscopy (SEM), X – ray Energy Diffraction Spectroscopy (EDS). Photoelectrocatalyst activity was investigated using Linear Sweep Voltametry (LSV), Electrochemical Impedance Spectroscopy (EIS), and tome – based flow metering (Chronoamprometry). In this study, the new Fe2O3@NiCo2O4 photoelectrocatalyst was obtained with a current density of 4.122 mA/cm2 at a potential of 1.34V relative to RHE
  9. Keywords:
  10. photoelectrocatalytic Activity ; Water Splitting ; Linear Sweep Voltammetry ; Electrochemical Impedance Spectroscopy ; Chronoamperometry ; Photoelectrochemical Water Splitting

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