Electrocatalytic Oxidation of Formaldehyde onto Carbon Paste Electrode Modified with Hydrogen Titanate Nanotubes, Including Nickel Hydroxide

  • Seyed Karim Hassaninejad-Darzi
  • Mostafa Rahimnejad
  • Farshad Shajie
  • Amir Hossein Shahbazi Kootenaei
Research Paper


In this study, the hydrogen titanate nanotubes (HTNs) with a high specific surface area were applied for modification of carbon paste electrode (CPE). Then, a novel, cheap and efficient catalyst for formaldehyde electrocatalytic oxidation was developed by decorating Ni2+ ions on the surface of the modified electrode. A sensitive oxidation peak was observed at 0.62 V vs. Ag|AgCl|KCl (3 M) in 0.1 M NaOH solution for electrocatalytic oxidation of formaldehyde. It has been observed that HTNs at the surface of CPE can improve catalytic efficiency of the dispersed Ni2+ ions toward oxidation of formaldehyde. The values of electron-transfer coefficient, the mean value of catalytic rate constant, and diffusion coefficient for formaldehyde and redox sites were obtained to be 0.545, 2.65 × 104 cm3 mol−1 s−1, and 3.97 × 10−6 cm2 s−1, respectively. The good catalytic activity, high sensitivity, and easy in preparation rendered the Ni-HTN/CPE to be a capable electrode for electrocatalytic oxidation of formaldehyde.

Graphical abstract


Hydrogen titanate nanotube Carbon paste electrode Nickel hydroxide Electrocatalytic oxidation Formaldehyde 


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Copyright information

© Shiraz University 2017

Authors and Affiliations

  • Seyed Karim Hassaninejad-Darzi
    • 1
  • Mostafa Rahimnejad
    • 2
  • Farshad Shajie
    • 1
  • Amir Hossein Shahbazi Kootenaei
    • 3
  1. 1.Department of Chemistry, Faculty of ScienceBabol Noshirvani University of TechnologyBabolIran
  2. 2.Biofuel and Renewable Energy Research Center, Faculty of Chemical EngineeringBabol Noshirvani University of TechnologyBabolIran
  3. 3.Department of Chemical Engineering, Mahshahr BranchIslamic Azad UniversityMahshahrIran

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