A Study of Adsorption Kinetics of β-phenylaminopropiophenone on Iron in Acid Solution

Authors

Dihua Wang, Lab. for Solid State Ion., Inst. of Phy., Chinese Academy of Sciences, Beijing 100080);
Xianzhang Bu, Dept. of Envir. Sci., Wuhan Univ., Wuhan 430072);
Jinyun Zou, Dept. of Envir. Sci., Wuhan Univ., Wuhan 430072);
Fuxing Gan, Dept. of Envir. Sci., Wuhan Univ., Wuhan 430072);

Corresponding Author

Dihua Wang

Abstract

The adsorption kinetics of β-phenylaminopropiophenone (PAP) on iron electrode in 0.5 mol/L H_2SO_4 solution with or without Cl~- were investigated by chronoamperometry. According to the following adsorption kinetic equation dθ/dt=kaCen-1(1-θ)nexp(fθ/2)-kdθexp(-fθ/2)The rate constants ka, kd as well as the adsorption free energy parameter f of PAP in sulfuric acid soltuion was calculated by used a computerized curve fitting program, the calculated ka, kd are in the order of 10~-1 mol/L s~-1 and 10~-3 s-1, respectively, f>0 in the concentration region of 5×10~-5 to 1×10~-3 mol/L of PAP. While in the 0.5 mol/L H_2SO_4 solution with 0.1 mol/L Cl-,the values of ka, kd are 66 mol/L s~-1 and 1.8×10~-3 s-1, respectively, f<0 when CPAP=2×~-5 mol/L, but the ka, kd equal to 1.2×10~-2 mol/L s~-1, 4.9×10~-4 s~-1, and f>0 when CPAP=1×10~-3 mol/L. Otherwhere, authors proved that the PAP occurred electrostatic adsorption under former condition, and it is chemisorbed on the iron surface under latter condition.

DOI Link

https://doi.org/10.61558/2993-074X.2675

Publication Date

1998-02-28

Online Available Date

1998-02-28

Revised Date

1998-02-28

Received Date

1998-02-28

Recommended Citation

Dihua Wang, Xianzhang Bu, Jinyun Zou, Fuxing Gan. A Study of Adsorption Kinetics of β-phenylaminopropiophenone on Iron in Acid Solution[J]. Journal of Electrochemistry, 1998 , 4(1): Article 10.
DOI: 10.61558/2993-074X.2675
Available at: https://jelectrochem.xmu.edu.cn/journal/vol4/iss1/10

References

1DrazicDM，DrazicVJ，JevticV．Theslowadsorptionofhalideionsandsomeorganicsandtheirinflu－enceoncorrosionratedeterminationfromlowpolarizationdata．ElectrochimcaActa，1989，34（8）：12512DelahayP．Doublelayerandelectrodekinetics．NewYork：Interscience，1965：2363VracarLj，DrazicDM．Influenceofchlorideionadsorptiononhydrogenevolutionreactiononiron．J．Electroanal．Chem．，1992，339：2674DrazicDM，VracarLj，DrazicVJ．Thekineticsofinhibitoradsorptiononiron．ElectrochimcaActa，1994，39（8／9）：11655卜宪章，汪的华，邹津耘，甘复兴．酸性溶液中β－苯胺基苯丙酮在铁电极上的吸脱附行为．电化学，1997，3（1）：556L·L·安德罗波夫著，吴仲达等译．理论电化学．北京：高等教育出版社，1982：274