NDLI: Electrocatalytic oxidation of methanol by ZSM-5 nanozeolite-modified carbon paste electrode in alkaline medium

Content Provider	Springer Nature Link
Author	Rahimnejad, Mostafa Hassaninejad Darzi, Seyed Karim
Copyright Year	2013
Abstract	Development of a novel modified electrode for electrocatalytic oxidation of methanol in order to decrease overvoltage is importance. In this paper, carbon paste electrode (CPE) was modified by ZSM-5 nanozeolite. The average diameter of used nanozeolite was 97 nm. Ni$^{2+}$ ions were incorporated to the nanozeolite by immersion of the modified electrode in a 0.1 M nickel chloride solution. Then, electrochemical studies of this electrode were performed by using cyclic voltammetry(CV) in alkaline medium. This modified electrode was used as an anode for the electrocatalytic oxidation of methanol in 0.1 M of NaOH solution. The obtained data demonstrated that ZSM-5 nanozeolite at the surface of CPE improves catalytic efficiency of the dispersed nickel ions toward methanol oxidation. The values of electron transfer coefficient, charge-transfer rate constant, and the electrode surface coverage are obtained 0.61, 0.2342 s$^{−1}$, and 4.33 × 10$^{−8}$ mol cm$^{−2}$, respectively. Also, the mean value of catalytic rate constant between the methanol and redox sites of electrode and diffusion coefficient were found to be 2.54 × 10$^{4}$ cm$^{3}$ mol$^{−1}$ s$^{−1}$ and 1.85 × 10$^{−8}$ cm$^{2}$ s$^{−1}$, respectively. Obtained results from both CV and chronoamperometric techniques indicated that the electrode reaction is a diffusion-controlled process.
Starting Page	1047
Ending Page	1056
Page Count	10
File Format	PDF
ISSN	1735207X
Journal	Journal of the Iranian Chemical Society
Volume Number	11
Issue Number	4
e-ISSN	17352428
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-11-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electrocatalysis Analytical Chemistry CPE-modified electrode Physical Chemistry Methanol oxidation Alkaline medium Biochemistry Inorganic Chemistry ZSM-5 nanozeolite Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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