Enhanced Electrochemical Oxidation of Hydrogen Peroxide at Hydroxyl Ion-Modified Gold Electrode in Alkaline Media

Authors

  • Md Rezwan Miah 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
  • Ramkrishna Saha Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114
  • Mohammad Abul Hasnat Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114

DOI:

https://doi.org/10.3329/jbas.v40i2.30768

Keywords:

Linear sweep voltammetry, Polycrystalline Au electrode, Chemisorption of OH-, Surface coverage, Hydrogen peroxide oxidation, Electrocatalysis

Abstract

Chemisorption of hydroxyl ion (OH-) from aqueous solution of KOH at the polycrystalline gold (Au (poly)) electrode under stirring condition was studied. A pre-wave at ca. 0.19 V was observed due to partial discharging of the chemisorbed OH-. The linear plot of the pre-wave current vs. scan rate passed through the origin suggesting that it was associated with a surface confined process. An extraordinary enhanced electrocatalytic oxidation of hydrogen peroxide (HO - 2 ) at the in situ fabricated OH--modified Au (poly) (OH-ôAu (poly)) electrode was achieved. A mechanism of the observed catalytic activity was proposed on the basis of electrostatic attraction between the chemisorbed OH- and partial positively charged hydrogen (Hd+) of HO - 2 molecules.

Journal of Bangladesh Academy of Sciences, Vol. 40, No. 2, 125-135, 2016

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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

2016-12-22

How to Cite

Miah, M. R., Sen, D., Saha, R., & Hasnat, M. A. (2016). Enhanced Electrochemical Oxidation of Hydrogen Peroxide at Hydroxyl Ion-Modified Gold Electrode in Alkaline Media. Journal of Bangladesh Academy of Sciences, 40(2), 125–135. https://doi.org/10.3329/jbas.v40i2.30768

Issue

Vol. 40 No. 2 (2016)

Section

Articles