Journal of electroanalytical chemistry (J ELECTROANAL CHEM )

Publisher: Elsevier

Description

Impact factor 2.87

  • Hide impact factor history
     
    Impact factor
  • 5-year impact
    2.68
  • Cited half-life
    0.00
  • Immediacy index
    0.55
  • Eigenfactor
    0.02
  • Article influence
    0.65
  • ISSN
    1572-6657

Publisher details

Elsevier

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Pre-print allowed on any website or open access repository
    • Voluntary deposit by author of authors post-print allowed on authors' personal website, arXiv.org or institutions open scholarly website including Institutional Repository, without embargo, where there is not a policy or mandate
    • Deposit due to Funding Body, Institutional and Governmental policy or mandate only allowed where separate agreement between repository and the publisher exists.
    • Permitted deposit due to Funding Body, Institutional and Governmental policy or mandate, may be required to comply with embargo periods of 12 months to 48 months .
    • Set statement to accompany deposit
    • Published source must be acknowledged
    • Must link to journal home page or articles' DOI
    • Publisher's version/PDF cannot be used
    • Articles in some journals can be made Open Access on payment of additional charge
    • NIH Authors articles will be submitted to PubMed Central after 12 months
    • Publisher last contacted on 18/10/2013
  • Classification
    ​ green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Nitrogen-doped hollow activated carbon nanofibers (HACNFs) have been prepared by the concentric electrospinning and the following NH3 activation. The as-obtained samples were directly used as supercapacitor electrode without binders and conductive additives. Owing to the unique hollow architecture and high N-doping level (8.2%), the HACNFs exhibit a high specific capacitance of 197 F g−1 at 0.2 A g−1, which is 1.33 times than that of the solid electrospun nanofibers activated in the same condition. The samples also possess a superior rate capability of 72.1% (143 F g−1) at 20 A g−1 and long-term cycling stability with a retention of 98.6% after 1000 cycles at 5 A g−1 in 6 M KOH.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this article, interconnected and staggered nickel sulfide nanosheets grown on nickel foam have been successfully prepared by an ultrasound-assisted soaking method using nickel hydroxide nanosheets as precursor. As electrode material for supercapacitor, the nickel sulfide nanosheets are characterized by cyclic voltammetry (CV), galvanostatic charge–discharge and electrochemical impedance spectroscopy (EIS) measurements. Owing to the unique structure, the nickel sulfide nanosheets exhibit excellent electrochemical performance, including high area capacitances (2.64 F cm−2) and remarkable cycling stability (90% retaining after 2000 cycling). Therefore, such a novel and facile synthetic route to synthesis the high-performance nickel sulfide nanosheets may open a new pathway to prepare sulfide materials with distinctive nanostructures and outstanding electrochemical performance. At the same time, asymmetric supercapacitor is fabricated with NiS-NF as positive material and active carbon as negative material. The asymmetric supercapacitor shows excellent long-term electrochemical stability and high energy density. All these results illustrate that the NiS-NF electrode is promising for potential application in supercapacitors and other fields.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Electrodeposition of lead from the concentrated nitrate electrolyte in the potentiostatic regime of electrolysis has been investigated by the analysis of the potentiostatic current transients and scanning electron microscope (SEM). It was found that the process of Pb nucleation from the concentrated electrolyte follows Scharifker model based on the 3D (three-dimensional) instantaneous nucleation with diffusion-controlled growth. The deviations of the obtained dependencies from the theoretical prediction for this model have been also discussed. Needle-like and fern-like dendrites, as well as crystals of irregular shape (precursors of dendrites) were formed in the diffusion controlled electrodeposition. The SEM analysis of these dendritic forms revealed their 2D (two-dimensional) growth. The size of needle-like dendrites was considerably larger than the size of both the fern-like dendrites and the irregular crystals. Although the electrodeposition process occurred inside the linear diffusion layer of the macroelectrode, the shape and size of dendrites were determined by the effect of local diffusion fields formed around tips (spherical diffusion) and top edges (cylindrical diffusion) of protrusions formed in the initial stage of the electrodeposition. The growth rates under the conditions of spherical and cylindrical diffusion control were mutually compared and a faster growth under the conditions of the spherical, in relation to the cylindrical diffusion, was proved. The effect of the current density distribution on formation of the final forms of Pb dendrites was also discussed.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Three different morphologies of MnO2 nanocrystals (i.e., nanoparticles, nanobowls and nanotubes) were successfully synthesized. This work focused on the interference in electroanalysis of heavy metal ions on the three different MnO2 nanocrystals modified electrodes. Some interesting phenomena on the mutual interferences were observed. That is, on MnO2 nanoparticles, the mutual interference was different from that on MnO2 nanobowls (and nanotubes) when it was measured between Cd(II) and Zn(II). For studying the mutual interference between Pb(II) and Cd(II), the interference on MnO2 nanotubes was different from that on MnO2 nanoparticles (and nanobowls). This study further indicated the interference evidences from electrochemical detection of Zn(II), Cd(II) and Pb(II) on three different morphologies of MnO2 nanocrystals.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study discusses a simple and feasible method that involves in-situ polymerization of aniline in the presence of zinc acetate dihydrate [Zn(CH3COO)2·2H2O] and graphene nanoplatelets (GNP) for the preparation of high performance electrode material (PZG composite) for supercapacitor application. In the presence of metal salt [Zn(CH3COO)2·2H2O], the capacitance value is changed and increased enormously compared to the capacitance value of PANI/GNP (PG) composite. Thus, the proposed method gives specific capacitance value for the PZG composite is ∼688 F/g at a 10 mV/s scan rate which is very high compared to the specific capacitance value (∼340 F/g) of PG composite at the same scan rate. In the PZG composite, zinc acetate and GNP are successfully coated by PANI, which provides more active sites for nucleation and electron transfer path. In addition, the inter- and intra-molecular interactions among them facilitate the electron transfer path which plays an important role to enhance the capacitance value of the composite. Moreover, the prepared composite is electrically conducting in nature and shows electrical conductivity in the order of ≈4.67 × 10−2 S cm−1. In addition, PZG composite shows semi-conducting behavior. Field Emission Scanning Electron Microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM) have been studied for the morphological analysis of the PZG composite.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Here, polydopamine derivative monolayer was generated by electro-polymerization of thiol dopamine derivatives modified on gold electrode, and the adhesion of polydopamine made it being a platform for secondary reaction. The influence of pH on the formation of polydopamine derivative was investigated. Horseradish peroxidase (HRP) was adhered on the polydopamine derivative monolayer electrode catalyzing the oxidation of H2O2. Cyclic voltammetry (CV) was used to detect the polydopamine monolayer as well as electrochemical catalysis of H2O2. Besides, electrochemical impedance spectroscopy (EIS) and atomic force microscope (AFM) were also employed to characterize the polymeric monolayer.
    Journal of electroanalytical chemistry 02/2015; 79:197-201.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Industrial iron sludge was used for the production of bulk Fe2O3, Fe2O3 nanoparticles and Fe2O3–carbon nanotube composite (Fe2O3–CNT) by using hydrothermal method. The structure and morphology of the catalysts were studied by X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) methods. Iron compounds were used as catalysts to modify the carbon paste electrode (CPE). The electro catalytic performance, kinetic parameters and mechanistic studies for hydrogen evolution reaction (HER) on the modified electrodes were investigated by linear sweep voltammetry (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) electrochemical techniques. For each of the catalysts, the effect of important parameters such as catalyst and binder amounts in the electrode composition and pH were examined. For all of the modified electrodes, H2SO4 (2 M) solution had the best efficiency. The electrocatalytic activity at the optimum conditions of all the modified electrodes was in the order of Fe2O3–CNT > nano-Fe2O3 > bulk Fe2O3. The modified electrodes were resistive to passivation, and applying successive potential cycles on these electrodes improves the HER performance. Due to the low cost, simplicity, ease of preparation in a large scale and high performance, the electrodes could be promising cathodes for HER in acidic media.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: A simple and cost-effective method for the synthesis and stabilization of palladium nanospheres is proposed to fabricate an effective sensor for electroanalytical determination of hydrogen peroxide (H2O2). UV–visible spectroscopy and X-ray diffraction confirm the presence of palladium nanoparticles (Pd NPs), and Fourier transform infrared (FTIR) spectrometry validates the protective action of polyvinylpyrrolidone (PVP) towards the NPs. The size and morphology of the Pd NPs were investigated using transmission electron microscopy (TEM). The electrochemical characteristics of the electrode that is modified using PVP stabilized palladium nanospheres are evaluated using cyclic voltammetry (CV), chronoamperometry and electrochemical impedance spectroscopy (EIS). The optimized sensor exhibits unique sensing performance towards hydrogen peroxide detection. The versatility of the sensor is demonstrated by the detection limit down to 8 nM with a quick response time of 3 s and a good linear range of 0.01–1 μM. In addition, the sensor also displayed good selectivity against interfering electroactive species such as ascorbic acid (AA), uric acid (UA) and acetaminophen (AP). The simplicity in the synthesis methodology and substrate fabrication along with attractive features such as lower limit of detection (LOD), wide linear range, good reproducibility and long-term stability make the proposed sensor a promising candidate for potential applications in H2O2 analysis.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Hierarchical WO3–TiO2 nanotube (WTNs) composite structures were obtained by anodization of titanium in a single-step process using sodium tungstate as the tungsten source. The resulting WTNs showed tubes with diameters in rang of 80–110 nm, wall thickness of 20–40 nm and tube lengths in the range of 7–8 μm. Diffuse reflectance spectra showed an increase in the visible absorption relative to pure TiO2 nanotubes (TNs). The photo-electrochemical performance was examined under simulated sunlight irradiation in 1 M NaOH electrolyte. Photo-electrochemical characterization shows that tungsten doping efficiently enhances the photo-catalytic water splitting performance of WTNs composite. The sample (WTNs-2) exhibited better photo-catalytic activity than the TNs and WTNs fabricated using other W concentrations. This can mainly be attributed to better charge carrier separation and transportation in photoelectrochemical water splitting by providing an effective way to address recombination losses in these composite materials.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Ruthenium oxide/titanium oxide, with a Ru:Ti atomic ratio of 7:3 was synthesized by modified sol–gel procedure and used as a support for platinum nanocatalyst for oxygen reduction reaction. The synthesized materials were characterized in terms of morphology, particle size distribution, chemical and phase composition by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high angle annular dark filed scanning transmission electron microscopy (HAADF, STEM) and electron energy loss spectroscopy (EELS). XPS spectra revealed that Ru atoms were in mainly in Ru(4+) oxidation state, the Ti atoms in Ti(4+) oxidation state, whereas the Pt-atoms were in metallic state. TEM analysis proved that platinum nanoparticles nucleated at both oxide species and homogeneous distribution was observed. The average platinum nanoparticle size was 3.05 nm.
    Journal of electroanalytical chemistry 02/2015; 739.
  • [Show abstract] [Hide abstract]
    ABSTRACT: A new, simple, and highly sensitive voltammetric method for the determination of low concentrations of a novel fungicide, fenoxanil (Fen), was developed using square wave voltammetry (SWV) and square wave adsorptive stripping voltammetry (SWAdSV) on a renewable silver amalgam film electrode (Hg(Ag)FE). The electrochemical reduction of Fen at the Hg(Ag)FE in Britton-Robinson (B-R) buffer at pH 6.8 was studied for the first time. The effect of the supporting electrolyte, pH, conditioning potential and conditioning time, frequency, amplitude, step potential, and accumulation potential and accumulation time were studied to select the optimum experimental conditions. The developed method can determine Fen in the concentration range of 5×10-7-4×10-6 mol L-1 for SWV and 1×10-10-9×10-10 mol L-1 for SWAdSV. Validation of the method was carried out. The method was successfully applied for trace level determination of Fen in spiked Warta River water and spiked rice samples by the standard addition method. The interference of common agents and metal ions was also examined. Fen adsorption at the mercury electrode was studied.
    Journal of electroanalytical chemistry 02/2015; 738:69-76.
  • Journal of electroanalytical chemistry 02/2015; 738:162-169.
  • [Show abstract] [Hide abstract]
    ABSTRACT: A novel approach to the synthesis of mono-dispersed platinum nanoparticles (Pt NPs) on multiwalled carbon nanotubes (MWNTs) has been proposed. With this method, we successfully assembled mono-dispersed Pt NPs on MWNTs. The method involved the in situ high-temperature decomposition of the precursor, platinum (II) acetylacetonate (Pt(acac)2), in liquid polyols. We used X-ray diffraction, scanning electron microscopy, and transmission electron microscopy to characterize the resulting MWNTs covered with Pt NPs (Pt@MWNTs). We found that the size of the Pt NPs and the coverage density on MWNTs could be tuned easily by changing the reaction temperature and the initial mass ratio of Pt(acac)2 to MWNTs. Electrocatalytic measurements showed that the Pt@MWNTs had excellent catalytic activities in the electrooxidation of methanol and in the oxygen reduction reaction. These Pt@MWNTs have potential applications in fuel cells and biosensors.KeywordsCarbon nanotubesPlatinum nanoparticlesMethanol oxidationOxygen reductionElectrocatalysis
    Journal of electroanalytical chemistry 02/2015; 738.
  • [Show abstract] [Hide abstract]
    ABSTRACT: This work described a sensitive electrochemical biosensor for the detection of carbaryl pesticide based on covalent immobilization of acetylcholinesterase (AChE) on the multiwall carbon nanotubes/graphene oxide nanoribbons (MWCNTs/GONRs) nanostructure. The catalytic activity of AChE immobilized on the MWCNTs/GONRs film was superior to that of MWCNTs due to the covalent binding technique, and the biosensor showed high affinity to acetylthiocholine with a Michaelis–Menten constant value of 0.25 mM. Based on the inhibition of carbaryl on the enzymatic activity of the immobilized AChE, the resulting biosensor exhibited superior performance for carbaryl detection including good reproducibility, acceptable stability, and wide linear range from 5 nM up to 5000 nM with a low detection limit of 1.7 nM. The biosensor was successfully challenged with real sample demonstrating to be a useful analytical tool for insecticide detection.
    Journal of electroanalytical chemistry 01/2015;
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this work, the determination of sulfamethoxazole (SMX) and sulfamethizole (SMT) as important sulfa drugs by differential pulse voltammetry and chemometric resolution methods is proposed. Modified carbon paste electrode (CPE) with Fe doped ZnO (FeZnO) nanorods was used as an efficient electrochemical sensor. Operating conditions and influencing parameters (involving several chemical and instrumental parameters) were optimized with central composite rotatable design (CCRD) and response surface methodology (RSM). To determine SMX and SMT with a high degree of overlapping, second-order electrochemical data was generated by changing the pulse height as an instrumental parameter. Under the optimized conditions, the dynamic range for SMX and SMT were from 2.0 to 160.0 and 2.5 to 170.0 μM and it was found that the detection limits were 30.0 and 25.0 nM, respectively. The modified electrode showed an improvement in anodic oxidation activity of SMX and SMT as well as an obvious enhancement in the current response compared with the bare CPE in phosphate buffer solution. Also, the modified electrode shows good sensitivity, selectivity and stability. The proposed method was applied for simultaneous determination of SMX and SMT in spiked human serum and urine samples.
    Journal of electroanalytical chemistry 12/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Hierarchical nanocomposites of poly(3,4-ethylenedioxythiophene) nanorods array on graphene oxide nanosheets (PEDOT/GO) were synthesized via a liquid-liquid interfacial polymerization method. The synthesized composites were characterized by using Fourier transform infrared (FTIR) and Raman spectroscopic studies, and their morphology was analyzed by transmission electron microscopy (TEM). Characterization and surface morphology results indicated that PEDOT with a nanorods-like structure successfully anchored on the surface of GO sheets, which could enhance the electro-active sites of the nanocomposites. Then the obtained PEDOT/GO nanocomposites were utilized to modify glassy carbon electrode and designed for the trace level sensing of rutin. Electrochemical results revealed that the PEDOT/GO nanocomposites modified electrode exhibited larger oxidation peak currents of rutin than pure PEDOT and GO owing to the synergistic effect of GO and PEDOT nanorods. Under optimized conditions, the anodic peak current was linear to the concentration of rutin in the range from 0.004 to 60 μM with the detection limit of 0.00125 μM. To further validate its possible application, the proposed method was successfully used for the determination of rutin in pharmaceutical formulations with satisfactory results.
    Journal of electroanalytical chemistry 12/2014;