The Electrochemical Behavior of Au/AuNPs/PNA/ZnSe-QD/ACA Electrode Towards CySH Oxidation

Azadbakht, Azadeh; Abbasi, Amir Reza; Derikvand, Zohreh; Karimi, Ziba

doi:10.1007/s40820-014-0028-y

Cited by 12 publications

(7 citation statements)

References 56 publications

(73 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The detection limit, linear calibration range, and applied potential for CySH and iodate detection are listed in Table 1 . These analytical parameters for the proposed modified electrode are comparable or better than the results reported for CySH and iodate determinated at the surface of recently fabricated modified electrodes [ 33 , 35 – 44 ].…”

Section: Resultssupporting

confidence: 78%

“…8 a), when the concentration of CySH is enhanced, the anodic peak current of the modified electrode increases, whereas its cathodic peak current diminishes, indicating a typical electrocatalytic oxidation process (EC′). Hence, a possible mechanism of CySH electrooxidation on AgNPs/CNT/rGO/MoO 2 /Sal-His electrode might be given as follows: This is similar to the mechanism reported previously for CySH oxidation on solid electrodes [ 33 , 34 ]. A possible mechanism for CySH oxidation at the surface of AgNPs/CNT/rGO/MoO 2 /Sal-His might be given as follows: The EIS results obtained in the presence of increasing concentration of CySH at the surface of the modified AgNPs/CNT/rGO/MoO 2 /Sal-His electrode are shown in Fig.…”

Section: Resultssupporting

confidence: 76%

See 1 more Smart Citation

Surface-Renewable AgNPs/CNT/rGO Nanocomposites as Bifunctional Impedimetric Sensors

et al. 2016

Self Cite

View full text Add to dashboard Cite

In this study, glassy carbon electrode modified by silver nanoparticles/carbon nanotube/reduced graphene oxide (AgNPs/CNT/rGO) composite has been utilized as a platform to immobilize cis-dioxomolybdenum (VI)–salicylaldehyde-histidine (MoO2/Sal-His). The modified electrode shows two reversible redox couples for MoO2/Sal-His. Electrocatalytic oxidation of cysteine (CySH) and electrocatalytic reduction of iodate on the surface of the modified electrode were investigated with cyclic voltammetry and electrochemical impedance spectroscopy methods. The presence of MoO2/Sal-His on AgNPs/CNT/rGO shifted the catalytic current of iodate reduction to a more positive potential and the catalytic current of cysteine oxidation to a more negative potential. The change of interfacial charge transfer resistance (R ct) recorded by the modified electrode was monitored for sensitive quantitative detection of CySH and iodate. Moreover, the sensor has a good stability, and it can be renewed easily and repeatedly through a mechanical or electrochemical process.Graphical Abstract

show abstract

Section: Resultssupporting

confidence: 78%

Section: Resultssupporting

confidence: 76%

Surface-Renewable AgNPs/CNT/rGO Nanocomposites as Bifunctional Impedimetric Sensors

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Gold nanoparticles are remarkable examples of nanoscaled electrocatalysts with new properties that have been used in fuel cells [ 20 – 23 ], sensors [ 24 – 26 ], as well as many other applications due to their small dimensional size, good stability, and excellent catalytic activity. Silver nanoparticles are also widely used in electrochemistry as electrode materials due to their high catalytic activity, novel optical property, and low cost compared to other noble metals [ 27 – 31 ].…”

Section: Introductionmentioning

confidence: 99%

Polymer Film Supported Bimetallic Au–Ag Catalysts for Electrocatalytic Oxidation of Ammonia Borane in Alkaline Media

Karabiberoğlu

Koçak

et al. 2016

Nano-Micro Lett.

View full text Add to dashboard Cite

Ammonia borane is widely used in most areas including fuel cell applications. The present paper describes electrochemical behavior of ammonia borane in alkaline media on the poly(p-aminophenol) film modified with Au and Ag bimetallic nanoparticles. The glassy carbon electrode was firstly covered with polymeric film electrochemically and then, Au, Ag, and Au–Ag nanoparticles were deposited on the polymeric film, respectively. The surface morphology and chemical composition of these electrodes were examined by scanning electron microscopy, transmission electron microscopy, electrochemical impedance spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. It was found that alloyed Au–Ag bimetallic nanoparticles are formed. Electrochemical measurements indicate that the developed electrode modified by Au–Ag bimetallic nanoparticles exhibit the highest electrocatalytic activity for ammonia borane oxidation in alkaline media. The rotating disk electrode voltammetry demonstrates that the developed electrode can catalyze almost six-electron oxidation pathway of ammonia borane. Our results may be attractive for anode materials of ammonia borane fuel cells under alkaline conditions.Graphical Abstract

show abstract

“…4 Therefore, it is critically important to develop novel electrode materials for sensitive determination of the trace amounts of different biomolecules, such as L-CySH in biological samples for clinical and pharmaceutical industrial applications. [5][6][7] Various methods have been used for the determination of L-CySH, such as high performance liquid chromatography (HPLC), 8 capillary electrophoresis, 9 chemiluminescene, 10 spectrofluorimetry 11,12 and fluorimetry. 13,14 However, some of these methods take the disadvantages of expensive apparatus, time-consuming and complicated preconcentration process, multisolvent extraction and trained technicians.…”

mentioning

confidence: 99%

Synthesis of Zinc Bismuthate Nanorods and Electrochemical Performance for Sensitive Determination of L-Cysteine

Tian

Lin

et al. 2015

J. Electrochem. Soc.

View full text Add to dashboard Cite

Zinc bismuthate nanorods with single crystalline cubic ZnBi38O58 phase have been synthesized by a simple hydrothermal process using zinc acetate and sodium bismuthate without any additives. Electron microscopy images show the nanorods have the length and diameter of 2–10 μm and 40–250 nm, respectively. The growth of the zinc bismuthate nanorods has been proposed as a nucleation and crystalline growth process based on the structure and morphology of the products obtained from different hydrothermal conditions. Zinc bismuthate nanorods modified glassy carbon electrode (GCE) has been prepared and used for the electrochemical determination of L-cysteine. A pair of semi-reversible redox peaks located at −0.07 V and −0.52 V are observed at the nanorods modified GCE in KCl solution and the electrode process is diffusion controlled. The intensities of the CV peaks increase obviously with increasing L-cysteine concentration and scan rate. There is a linear relationship between the peak current and concentration of 0.0001–2 mM. The detection limit is 0.074 μM (based on the signal-to-noise ratio of 3) with a correlation coefficient of 0.996. The nanorods modified GCE shows good stability and reproducibility.

show abstract

The Electrochemical Behavior of Au/AuNPs/PNA/ZnSe-QD/ACA Electrode Towards CySH Oxidation

Cited by 12 publications

References 56 publications

Surface-Renewable AgNPs/CNT/rGO Nanocomposites as Bifunctional Impedimetric Sensors

Surface-Renewable AgNPs/CNT/rGO Nanocomposites as Bifunctional Impedimetric Sensors

Polymer Film Supported Bimetallic Au–Ag Catalysts for Electrocatalytic Oxidation of Ammonia Borane in Alkaline Media

Synthesis of Zinc Bismuthate Nanorods and Electrochemical Performance for Sensitive Determination of L-Cysteine

Contact Info

Product

Resources

About