Electrocatalytic oxidation of ammonia in the neutral medium using Cu2O.CuO film immobilized on glassy carbon surface

Md Fazle Shabik, Md Mahmudul Hasan, K. A. Alamry, Mohammed M. Rahman, Yuki Nagao, Mohammad A. Hasnat*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Electrocatalytic ammonia oxidation reaction (AOR) was executed on the copper oxide layer, electrochemically deposited on a glassy carbon electrode (GCE) surface. The XPS analysis revealed that the oxide film contains 80% Cu(I) and 20% Cu(II) species. The EIS analysis suggests that the resultant surface can catalyze ammonia oxidation reactions efficiently. The as prepared GCE-Cu2O.CuO favored the neutral medium for executing AOR with a degradation rate of 3.76 × 10−4 mol min−1 cm−2. Kinetic investigation shows that ammonia oxidation involves a three electron transfer first-order reaction. Tafel analysis of current–potential polarization curves indicates that species such as NH3 or NHads and NH2ads intermediates do not influence the reaction rate, which made the electrode unique for carrying out AOR. The formal potential value of AOR was evaluated to be ~0.7 V vs Ag/AgCl (sat.KCl) having standard rate constant (k°) of 5.52 × 10−6 cm/s.

Original languageEnglish
Article number115592
JournalJournal of Electroanalytical Chemistry
Volume897
DOIs
Publication statusPublished - 2021 Sep 15
Externally publishedYes

Keywords

  • Ammonia oxidation
  • Copper oxide film
  • Electrocatalysis
  • Electrokinetics
  • Tafel analysis

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

Fingerprint

Dive into the research topics of 'Electrocatalytic oxidation of ammonia in the neutral medium using Cu2O.CuO film immobilized on glassy carbon surface'. Together they form a unique fingerprint.

Cite this