Electrocatalytic Oxidation of Hydroxylamine at a Quinizarine Modified Glassy Carbon Electrode: Application to Differential Pulse Voltammetry Detection of Hydroxylamine

Mohammad MAZLOUMARDAKANI; Payam Ebrahimi KARAMI

Makale detayları

Electrocatalytic Oxidation of Hydroxylamine at a Quinizarine Modified Glassy Carbon Electrode: Application to Differential Pulse Voltammetry Detection of Hydroxylamine

Yazarlar:

Mohammad MAZLOUMARDAKANI | Payam Ebrahimi KARAMI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2008 Vol.32 Issue 5, pp.571-584

Belge Tipi:

Makale

Yayın Tarihi:

4/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000728438

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

The electrocatalytic behavior of hydroxylamine was studied  on a glassy carbon electrode modified by electrodeposition of  quinizarine, using cyclic voltammetry, chronoamperometry, and rotating  disk voltammetry as diagnostic techniques.  Cyclic voltammetry showed  that the catalytic current of the system depends on the concentration  of hydroxylamine.  The magnitude of the peak current for quinizarine  increased sharply in the presence of hydroxylamine and proportional to  hydroxylamine concentration.  The diffusion coefficient of  hydroxylamine and the catalytic rate constant for the catalytic  reaction of quinizarine with hydroxylamine were also estimated using a  rotating disk electrode experiment.  The kinetics parameters of this  process were calculated, and the apparent electron transfer rate  constant ks and a (charge transfer coefficient between glassy  carbon electrode and quinizarine) were 4.44 s-1 and 0.66,  respectively.  Chronoamperometry and cyclic voltammetry studies were  also used to determine the overall number of electrons involved in the  catalytic oxidation of hydroxylamine, which was found to be 1.  Hydroxylamine in the range of 1-10 m M could be determined by  differential pulse voltammetry.

 

The electrocatalytic behavior of hydroxylamine was studied  on a glassy carbon electrode modified by electrodeposition of  quinizarine, using cyclic voltammetry, chronoamperometry, and rotating  disk voltammetry as diagnostic techniques.  Cyclic voltammetry showed  that the catalytic current of the system depends on the concentration  of hydroxylamine.  The magnitude of the peak current for quinizarine  increased sharply in the presence of hydroxylamine and proportional to  hydroxylamine concentration.  The diffusion coefficient of  hydroxylamine and the catalytic rate constant for the catalytic  reaction of quinizarine with hydroxylamine were also estimated using a  rotating disk electrode experiment.  The kinetics parameters of this  process were calculated, and the apparent electron transfer rate  constant ks and a (charge transfer coefficient between glassy  carbon electrode and quinizarine) were 4.44 s-1 and 0.66,  respectively.  Chronoamperometry and cyclic voltammetry studies were  also used to determine the overall number of electrons involved in the  catalytic oxidation of hydroxylamine, which was found to be 1.  Hydroxylamine in the range of 1-10 m M could be determined by  differential pulse voltammetry.

Makale detayları

Electrocatalytic Oxidation of Hydroxylamine at a Quinizarine Modified Glassy Carbon Electrode: Application to Differential Pulse Voltammetry Detection of Hydroxylamine

Yazarlar: Mohammad MAZLOUMARDAKANI | Payam Ebrahimi KARAMI

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2008 Vol.32 Issue 5, pp.571-584

Belge Tipi: Makale

Yayın Tarihi: 4/2008

Belge Dili: Türkçe

Document ID (Org No.): 2000728438

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Mohammad MAZLOUMARDAKANI | Payam Ebrahimi KARAMI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2008 Vol.32 Issue 5, pp.571-584

Belge Tipi:

Makale

Yayın Tarihi:

4/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000728438

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527