Cyclic Voltametric Behavior of Iron in 0-2 M HNO3 Solutions

Abstract
Keywords
Introduction
Materials and Methods
Results
Discussion
Conclusion
Acknowledgement
Funding Sources
Conflict of Interest
Data Availability Statement
Ethics Statement
References

Article | Open Access

Cyclic Voltametric Behavior of Iron in 0-2 M HNO3 Solutions

Volume 7, Number 2

N. A. Al-Mobarak

Department of Chemistry, Faculty of Science, Princess Nora Bint Abdurrahman University, Riyadh (Saudi Arabia).

DOI : http://dx.doi.org/10.13005/msri/070202

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ABSTRACT:

The electrochemical behavior of iron electrodes is investigated in the presence of 0.5 – 2.0 M HNO3 solutions at 250C using cyclic voltammetric technique. The effect of cycling, scanning rate, voltage excursion and the initial starting potential was studied. An unusual anodic peak (B) in the active potential region; an oxidation peak (G) during the reverse sweep; crossing unique point ?a? and hydride–oxidation step (arrest A) characterizes the complete voltammogram. Also, the results revealed that no passivation takes place and the presence of two critical potentials namely: Ec and Ed. Below Ec (during the lower potential region) hydrogen evolution reaction occurs and above Ed (during the higher potential region) oxygen evolution reaction occurs.

KEYWORDS:

Cyclic voltammetry; iron, HNO3; electrochemical behaviour

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