Kinetics of oxidation of hydrogen peroxide at hemin-modified electrodes in nonaqueous solvents

Brusova, Zuzana; Magner, Edmond

doi:10.1016/j.bioelechem.2009.02.014

Cited by 14 publications

(9 citation statements)

References 40 publications

(71 reference statements)

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“…From data listed in Table 2, one can see that the surface coverage was larger than the value corresponding to a hemin monolayer (7.5 × 10 −11 mol cm −2 ) [3] indicating the formation of more than one monolayer of hemin. However, this value was in agreement with those already reported in the literature for hemin modified surfaces [36].…”

Section: Cyclic Voltammetrymentioning

confidence: 95%

“…This functionality makes this minizyme very attractive for bioelectronic and bioelectrochemical sensors applications [1][2][3].…”

Section: Introductionmentioning

confidence: 98%

“…Various methods have been used to realize hemin-modified electrodes, such as entrapment in a polymeric matrix [5,6], adsorption on different carbon nanomaterials [3,7], drop casting [1], layer-by-layer deposition [8], incorporation in carbon paste [9], etc. Nevertheless, other new alternatives should be investigated in order to increase the performances of the hemin-based electrodes.…”

Section: Introductionmentioning

confidence: 99%

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Glassy carbon electrode modified with hemin and new melamine compounds for H2O2 amperometric detection

Deac

Morar

Turdean

et al. 2016

J Solid State Electrochem

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In an attempt to increase the stability and efficiency of hemin-modified electrodes, the present work reports the preparation of a new modified glassy carbon electrode obtained by immobilization of hemin (Hm) on the electrode surface together with a new N-substituted melamine (2,4,6-triamino-1,3,5-triazine) based G-2 dendrimer comprising paminophenol as peripheral unit (Den) or with one of its analogues, a melamine G-0 dimer (Dim). Basic structural features, able to determine intimate relationships between Hm and Dim (or Den) at room temperature in solid state, were evidenced with the use of vibrational analysis carried out by FT-IR. This method revealed contacts between Hm and Dim or Den respectively as H-bond interactions, proton-interchange, and π-π stacking interactions. The new modified electrodes were characterized by cyclic voltammetry and electrochemical impedance spectroscopy and tested for amperometric detection of H 2 O 2 . In this purpose, GC/Hm-Dim electrode exhibited better catalytic properties than GC/Hm-Den electrode, but lower stability.

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Section: Cyclic Voltammetrymentioning

confidence: 95%

“…This functionality makes this minizyme very attractive for bioelectronic and bioelectrochemical sensors applications [1][2][3].…”

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Glassy carbon electrode modified with hemin and new melamine compounds for H2O2 amperometric detection

Deac

Morar

Turdean

et al. 2016

J Solid State Electrochem

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“…Due to the aforementioned inherent peroxidase activity of the heme cofactor, hemin and other types of Fe-porphyrins have been widely used as catalysts for the electrochemical determination of the typical peroxidase substrates hydrogen peroxide [ 44 , 147 , 148 ] or phenolic compounds [ 149 ] as well as other substances like superoxide [ 150 ], and peroxynitrite [ 151 ]. In addition, the MP-11-based artemisinin sensor mentioned in Section 3.3 was initially developed using hemin as the peroxide reducing catalyst adsorbed on TiO 2 -modified silica [ 152 ].…”

Section: Peroxidase Reactions On Semiconductors For Electrochemicamentioning

confidence: 99%

Electrochemical Biosensors Employing Natural and Artificial Heme Peroxidases on Semiconductors

Neumann

Wollenberger

2020

Sensors

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Heme peroxidases are widely used as biological recognition elements in electrochemical biosensors for hydrogen peroxide and phenolic compounds. Various nature-derived and fully synthetic heme peroxidase mimics have been designed and their potential for replacing the natural enzymes in biosensors has been investigated. The use of semiconducting materials as transducers can thereby offer new opportunities with respect to catalyst immobilization, reaction stimulation, or read-out. This review focuses on approaches for the construction of electrochemical biosensors employing natural heme peroxidases as well as various mimics immobilized on semiconducting electrode surfaces. It will outline important advances made so far as well as the novel applications resulting thereof.

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“…It is also the active center of the heme-protein family, such as b-type cytochromes, peroxidase, myoglobin and hemoglobin. It has also been well recognized for its excellent electrocatalytic properties towards the detection of many important analytes such as oxygen [32], nitrite [33], nitric oxide [34], trichloroacetic acid [35], hydrogen peroxide [36][37][38][39][40], L-cysteine [41], superoxide [42] and tryptophan [43].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical incorporation of hemin in a ZnO–PPy nanocomposite on a Pt electrode as NOx sensor

Prakash¹,

Rajagopal²,

Singh³

et al. 2012

Analyst

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An electrochemical NO(x) sensor was fabricated based on the incorporation of hemin on a ZnO-PPy nanocomposite modified Pt electrode. Scanning electron microscopy, energy dispersive X-ray analysis and cyclic voltammetry were used to confirm the successful stepwise assembly procedure for the sensor. The electrocatalytical behavior of the sensor was investigated by cyclic voltammetry. The hemin-ZnO-PPy-Pt electrode exhibited characteristic hemin reversible redox peaks at 0.035 V and -0.11 V vs. Ag/AgCl respectively. The hemin-ZnO-PPy-Pt electrode exhibited 3-fold enhanced electrocatalytic activity towards NO(x) compared to the hemin-PPy-Pt electrode. The electrocatalytic response of the sensor was proportional to the NO(x) concentration in the range of 0.8 to 2000 μM (r(2) = 0.9974) with a sensitivity of 0.04 μA μM(-1) cm(-2) and detection limit of 0.8 μM for the hemin-ZnO-PPy-Pt electrode. The low detection limit, wide linear range and enhanced sensitivity of the present sensor make it valuable for potential applications. In addition, this sensor exhibited good reproducibility and stability.

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Kinetics of oxidation of hydrogen peroxide at hemin-modified electrodes in nonaqueous solvents

Cited by 14 publications

References 40 publications

Glassy carbon electrode modified with hemin and new melamine compounds for H2O2 amperometric detection

Glassy carbon electrode modified with hemin and new melamine compounds for H2O2 amperometric detection

Electrochemical Biosensors Employing Natural and Artificial Heme Peroxidases on Semiconductors

Electrochemical incorporation of hemin in a ZnO–PPy nanocomposite on a Pt electrode as NOx sensor

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