Cyclic voltametric behavior of iron in 0-2 M HNO3 solutions | Zendy

N.A. Al-Mobarak | Zendy

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Cyclic voltametric behavior of iron in 0-2 M HNO3 solutions

Author(s) -

N.A. Al-Mobarak

Publication year - 2010

Publication title -

material science research india

Language(s) - English

Resource type - Journals

eISSN - 2394-0565

pISSN - 0973-3469

DOI - 10.13005/msri/070202

Subject(s) - passivation , electrochemistry , horizontal scan rate , redox , electrode , hydride , oxygen evolution , oxygen , chemistry , anode , hydrogen , materials science , inorganic chemistry , cyclic voltammetry , nanotechnology , organic chemistry , layer (electronics)

The electrochemical behavior of iron electrodes is investigated in the presence of 0.5 – 2.0 M HNO3 solutions at 25 0C 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.

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