The Adsorption desorption Behaviors of β phenylaminopropiophenone on iron in sulphuric acid solution
Abstract
The adsorption desorption behaviors of β phenylaminopropiophenone (PAP) on iron in 0.5 mol·L -1 H 2SO 4 solution with or without halide ions (Cl -,I -) were investigated by potentiostatic polarization measurement. The results show that the adsorption of PAP on iron surface follows Flory Huggins isotherm, the adsorption free energy parameter ( f ) is positive in H 2SO 4 solution; In the presence of 0.1 mol·L -1 Cl -1 , when C PAP ≤2×10 -5 mol·L -1 , f<0 and when C PAP ≥5×10 -5 mol·L -1 , f>0 . A desorption phenomenon was observed at more positive potential region in anodic polarization curves. Furthermore, the anodic desorption potential ( E des ) of PAP+X - is independent of PAP concentration at lower concentration region, and E des vs. lg C PAP is a straight line at higher concentration region. The joint adsorption modes under different conditions were determined according to the above stated relation of E des to PAP concentrations as well as the adsorption free energy parameter f values.
Keywords
Iron, β phenylaminopropiophenone, Adsorption, Anodic desorption
Publication Date
1997-02-28
Online Available Date
1997-02-28
Revised Date
1997-02-28
Received Date
1997-02-28
Recommended Citation
Xianzhang Bu, Dihua Wang, Jinyun Zou, Fuxing Gan.
The Adsorption desorption Behaviors of β phenylaminopropiophenone on iron in sulphuric acid solution[J]. Journal of Electrochemistry,
1997
,
3(1): Article 10.
DOI: 10.61558/2993-074X.3099
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol3/iss1/10
