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RGO-α-Fe2O3/β-FeOOH ternary heterostructure with urchin-like morphology for efficient oxygen evolution reaction

Bazri, B ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jelechem.2019.04.069
  3. Publisher: Elsevier B.V , 2019
  4. Abstract:
  5. RGO-α-Fe2O3/β-FeOOH ternary heterostructure composite has been developed as an active photocatalyst for photoelectrochemical water splitting. RGO-α-Fe2O3/β-FeOOH has been successfully synthesized through one-pot hydrothermal-ionic liquid assisted route using tetrabutyl ammonium L-methioninate [TBA][L-Met]and graphene oxide (GO). The electrochemical studies were carried out to demonstrate the oxygen evolution reaction (OER)and photocatalytic activities. The overpotential reduction by rGO-α-Fe2O3/β-FeOOH sample was higher than the nanobean α-Fe2O3/β-FeOOH and pristine α-Fe2O3 samples. The photocurrent density enhanced for rGO-α-Fe2O3/β–FeOOH urchin-like structure and obtained as 0.62 mA·cm−2. The data evidences the idea that the β–FeOOH layer in the modified morphology acts as an electron donor and the donor density increased substantially. Results from this study indicate that the rGO-α-Fe2O3/β-FeOOH can improve OER performance significantly with a peak shift of 0.13 V in the potential window, revealing its excellent potential as a higher rate and lower energy needed candidate. © 2019 Elsevier B.V
  6. Keywords:
  7. Graphene oxide ; Ionic liquid ; Oxygen evolution ; Photocatalyst ; α-Fe2O3 ; Graphene ; Graphene oxide ; Ionic liquids ; Morphology ; Oxygen ; Photocatalysts ; Photocatalytic activity ; Electrochemical studies ; Oxygen evolution reaction ; Photocurrent density ; Photoelectrochemical water splitting ; Potential windows ; Urchin-like structures ; Water splitting ; Hematite
  8. Source: Journal of Electroanalytical Chemistry ; Volume 843 , 2019 , Pages 1-11 ; 15726657 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1572665719303339