Tetracyanoquinodimethanide adsorbed on a silica gel modified with titanium oxide for electrocatalytic oxidation of hydrazine

Duarte, Juliana Canto; Luz, Rita de Cássia Silva; Damos, Flávio Santos; Oliveira, Adriano Bof de; Kubota, Lauro T.

doi:10.1007/s10008-006-0209-9

Cited by 20 publications

(8 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Firstly, the iron porphyrin was immobilized on the silica niobium matrix, designated as SiNb. Due the amphoteric properties of the SiNb material, the interaction between complex -support probably occurs by electrostatic attraction between the silica matrix and the porphyrin complex with charge þ 1, similar to that observed in the literature for other species immobilized on silica gel modified with different metal oxides [46].…”

mentioning

confidence: 68%

Electrochemical Studies of an Iron Porphyrin Immobilized on Nb₂O₅/SiO₂ and Its Application for Simultaneous Determination of Dopamine and Ascorbic Acid Using Multivariate Calibration Methodology

et al. 2007

View full text Add to dashboard Cite

This paper shows an application of a first generation porphyrin, FeTPPCl 5,10,25,20-tetraphenylporphyrin iron(III) chloride (FeTPPCl or FeTPP þ ) immobilized on a inorganic matrix, SiO 2 /Nb 2 O 5 (niobium oxide grafted on silica gel surface, designated as SiNb) to the preparation of a carbon paste electrode (CPE). The carbon paste modified with a FeTPP þ immobilized on SiO 2 /Nb 2 O 5 (SiNb), designated as CPE/SiNb/FeTPP, was applied for simultaneous electrochemical determination of dopamine (DA) and ascorbic acid (AA). Because of the overlapping of the voltammetric peaks of DA and AA, the multivariate calibration methodology based on partial least square regression (PLSR) was proposed. The data pre-treatment used in this process was mean centering and to choose the principal components number a cross validation procedure was used (leave-one-out). Five principal components were necessary to obtain the lowest PRESS (prediction residual error sum of squares). The statistics showed that this model explains approximately 95.2% of the variance from the data set. Using this model, high correlation between actual and predicted concentrations was observed, mainly for higher dopamine (maximum relative error of 8%) and ascorbic acid (maximum relative error of 10%) concentrations. For low analytes concentrations the relative error increases to 35% for AA. Considering the similarity of the voltammetric response of the analytes, the results obtained were satisfactory and showed the promissory capability of the CPE/SiNb/FeTPP coupled multivariate calibration methods for simultaneous voltammetric analysis of DA and AA.

show abstract

mentioning

confidence: 68%

Electrochemical Studies of an Iron Porphyrin Immobilized on Nb₂O₅/SiO₂ and Its Application for Simultaneous Determination of Dopamine and Ascorbic Acid Using Multivariate Calibration Methodology

et al. 2007

View full text Add to dashboard Cite

show abstract

“…9). According to the following equation for totally irreversible diffusion controlled processes [40][41][42][43], the total number of electrons in the oxidation of hydrazine was calculated to be n ≈ 4 (the calculated value was 3.94, 3.97, and 3.84 for Ni(OH) 2 -MnO 2 , MnO 2 and Ni(OH) 2 modified electrodes).…”

Section: Effects Of Ph On Hydrazine Oxidationmentioning

confidence: 99%

Facile preparation of Ni(OH)2–MnO2 hybrid material and its application in the electrocatalytic oxidation of hydrazine

Prathap

Anuraj

Satpati

et al. 2013

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Cobalt complexes have been applied as mediators to modify carbon paste electrodes in order to obtain a catalytic activity for hydrazine oxidation [18]. A modified carbon paste electrode prepared by using tetracyanoquinodimethanide adsorbed on silica modified with titanium oxide showed an excellent catalytic activity and stability for hydrazine oxidation [19].…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticles/poly ortho-toluidine/modified carbon paste electrode as a stable anode for hydrazine oxidation in the alkaline media

Ojani

Alinezhad

Aghajani

et al. 2015

J Solid State Electrochem

View full text Add to dashboard Cite

Silver nanoparticles were deposited on the surface of poly ortho-toluidine (POT) modified carbon paste electrode (n-Ag/POT/MCPE) by the electrochemical method. The electrocatalytic activity of the prepared modified electrode toward the hydrazine oxidation in alkaline solutions was evaluated using cyclic voltammetry (CV) and chronoamperometry (CHA) methods. The CV experiment showed that the n-Ag/ POT/MCPE electrode is electrochemically active toward the hydrazine oxidation, and a sharp increment in the current of hydrazine oxidation was observed with the increase of the hydrazine concentration. CHA results show stable steady state current (I ss ) for the hydrazine oxidation. A linear dependence of the I ss upon the hydrazine concentration was found in the range of 1.0×10 −4 to 6.0×10 −3 M hydrazine. Results imply that the n-Ag/POT/MCPE presents stable and significantly high electroactivity for the hydrazine oxidation.

show abstract

Tetracyanoquinodimethanide adsorbed on a silica gel modified with titanium oxide for electrocatalytic oxidation of hydrazine

Cited by 20 publications

References 41 publications

Electrochemical Studies of an Iron Porphyrin Immobilized on Nb₂O₅/SiO₂ and Its Application for Simultaneous Determination of Dopamine and Ascorbic Acid Using Multivariate Calibration Methodology

Electrochemical Studies of an Iron Porphyrin Immobilized on Nb₂O₅/SiO₂ and Its Application for Simultaneous Determination of Dopamine and Ascorbic Acid Using Multivariate Calibration Methodology

Facile preparation of Ni(OH)2–MnO2 hybrid material and its application in the electrocatalytic oxidation of hydrazine

Silver nanoparticles/poly ortho-toluidine/modified carbon paste electrode as a stable anode for hydrazine oxidation in the alkaline media

Contact Info

Product

Resources

About

Tetracyanoquinodimethanide adsorbed on a silica gel modified with titanium oxide for electrocatalytic oxidation of hydrazine

Cited by 20 publications

References 41 publications

Electrochemical Studies of an Iron Porphyrin Immobilized on Nb2O5/SiO2 and Its Application for Simultaneous Determination of Dopamine and Ascorbic Acid Using Multivariate Calibration Methodology

Electrochemical Studies of an Iron Porphyrin Immobilized on Nb2O5/SiO2 and Its Application for Simultaneous Determination of Dopamine and Ascorbic Acid Using Multivariate Calibration Methodology

Facile preparation of Ni(OH)2–MnO2 hybrid material and its application in the electrocatalytic oxidation of hydrazine

Silver nanoparticles/poly ortho-toluidine/modified carbon paste electrode as a stable anode for hydrazine oxidation in the alkaline media

Contact Info

Product

Resources

About

Electrochemical Studies of an Iron Porphyrin Immobilized on Nb₂O₅/SiO₂ and Its Application for Simultaneous Determination of Dopamine and Ascorbic Acid Using Multivariate Calibration Methodology

Electrochemical Studies of an Iron Porphyrin Immobilized on Nb₂O₅/SiO₂ and Its Application for Simultaneous Determination of Dopamine and Ascorbic Acid Using Multivariate Calibration Methodology