Electrocatalytic activity of Chemisorbed Hydroxyl ion towards Oxidation of Hydrogen peroxide anion in Alkaline media

Authors

  • Md Rezwan Miah Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114
  • Tarannuma Ferdous Manny Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114
  • Debashis Sen Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114
  • Md Azizur Rahman Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114
  • Md Saiful Alam Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114
  • Ramkrishna Saha Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114
  • Md Towhidul Islam Tareqe Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114
  • Md Rakib Mahmud Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114

DOI:

https://doi.org/10.3329/jbas.v41i1.33497

Keywords:

Chemisorption of OH-, Surface coverage, Hydrogen peroxide oxidation, Electrocatalysis, Competitive adsorption, Calibration curve

Abstract

In situ chemisorbed hydroxyl ion (OH-) onto clean polycrystalline gold (Au (poly)) electrode showed an extraordinary enhanced electrocatalytic activity towards oxidation of hydrogen peroxide anion (HO2-) in alkaline media. The oxidation of HO2- at the fabricated electrode was found to be a diffusion controlled process. The anodic transfer coefficient of the oxidation reaction was estimated as 0.47. Chloride ion (Cl-) replaced the chemisorbed OH- from the surface of the modified Au (poly) (OH-)Au (poly)) electrode leading to diminishing the observed electrocatalytic activity. The optimized concentration of KOH solution for the highest catalytic activity was found to be ca. 0.1 M. A linear calibration curve for various concentrations of HO2-? in the range of 0.5 to 5 mM was obtained having sensitivity equal to 1.028 A cm-2 M-1.

Journal of Bangladesh Academy of Sciences, Vol. 41, No. 1, 29-36, 2017

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Author Biography

Md Rezwan Miah, Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114



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Published

2017-08-23

How to Cite

Miah, M. R., Manny, T. F., Sen, D., Rahman, M. A., Alam, M. S., Saha, R., Tareqe, M. T. I., & Mahmud, M. R. (2017). Electrocatalytic activity of Chemisorbed Hydroxyl ion towards Oxidation of Hydrogen peroxide anion in Alkaline media. Journal of Bangladesh Academy of Sciences, 41(1), 29–36. https://doi.org/10.3329/jbas.v41i1.33497

Issue

Vol. 41 No. 1 (2017)

Section

Articles