Progress in the use of electrodes modified with coordination compounds for methanol electro-oxidation

Cruz-Navarro, Jesús Antonio; Mendoza-Huízar, Luis Humberto; Salazar‐Pereda, Verónica; Cobos-Murcia, J.A.; Colorado‐Peralta, Raúl; Álvarez-Romero, Giaan Arturo

doi:10.1016/j.ica.2021.120293

Cited by 15 publications

(20 citation statements)

References 88 publications

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“…This reaction can only occur in high strong alkaline solutions, so when pH reaches below 10, a sharp decrease in the peak current can be observed. Such observations for the modified CPE or other electrodes with metal oxides such NiO, CuO etc, have been reported [26,28,46,72,73,76–97] …”

Section: Resultsmentioning

confidence: 57%

“…Among the modifiers used, some ligands and novel compounds can be considered potent modifiers recommended to researchers in the future [20–24] . Electrochemical techniques with high sensitivity, low cost, ease of modification of the electrode surface in more cases, and relatively short analysis time characteristics have been commonly referred to as other analytical techniques and used in the detection/determination of different organic and inorganic chemicals [25–47] . Among the chemical compounds, anticancer drugs are highly electroactive due to their structural OH and NH2 functional groups.…”

Section: Introductionmentioning

confidence: 99%

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The Experimental Design Approach in Square‐Wave Voltammetric Determination of Tamoxifen by NiO‐CPE**

Raeisi‐Kheirabadi

Nezamzadeh‐Ejhieh

2022

ChemistrySelect

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Due to the explosive global increase of various cancers, the need to introduce/develop novel catalysts/sensors for quantitative determination of cancer drugs is emphasized. Nickel oxide nanoparticles (NiO‐NPs) calcined at 200 °C were used as a modifier of carbon paste electrode (CPE) to quantify tamoxifen (TAM) in an aqueous solution. The square wave voltammetry (SqW) was used due to its high sensitivity. The modified NiO‐CPE showed an SqW anodic peak current with a peak potential of about 420 mV in the NaOH‐supporting electrolyte. This peak current was decreased when TAM analyte was added to the test solution. Thus, this reduced peak current (Δi) was used to quantify TAM in solution. The experimental design used the response surface methodology (RSM) approach to study the simultaneous interaction effects between the influencing variables. The optimized run was associated with a 10 % NiO ingredient in the CPE, 0.3 M NaOH, an amplitude of 200 mV, a step potential of 3 mV, and a frequency of 25 Hz. A proportional behavior was obtained between the mentioned Δi and TAM concentration in the range of 10–60 nM. The detection (LOD) and quantification (LOQ) limits were 1.81±0.35 and 6.05±0.24 nM, respectively. Interfering and recovery results confirmed the applicability of the proposed NiO‐CPE electrode for TAM determination in complex matrixes and the direct assay of the drug in human serum.

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Section: Resultsmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

The Experimental Design Approach in Square‐Wave Voltammetric Determination of Tamoxifen by NiO‐CPE**

Raeisi‐Kheirabadi

Nezamzadeh‐Ejhieh

2022

ChemistrySelect

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“…The process is carried out by using cyclic voltammetry (CV), and during the electropolymerization, the voltammogram displays a progressive increase of the current density initiated by the conductive properties of the polymerized species on the electrode's surface. In this process, it is important to control the surface coverage concentration (Γ), which may disturb the diffusion of analytes into the electrode and affects the electrocatalytic activity [10].…”

Section: Electrodes Modification With Mp and Mpcmentioning

confidence: 99%

“…Depending on the redox process (oxidation or reduction), the current density of these peaks tends to increase or decrease when the modifier has an electro-catalytic activity toward the analyte. Usually, a linear behavior is observed between the peak current density and the square root of the scan rate, indicating a diffusion-controlled process [10]. Chronoamperometry (CA) is useful to explore the kinetical parameters of redox catalytical processes on the electrode's surface and is the most used electroanalytical technique for quantitative analysis.…”

Section: Characterization Of Modified Electrodesmentioning

confidence: 99%

“…Regarding metal porphyrins, films of diverse types of nickel and cobalt porphyrins have been explored on glucose electro-oxidation in alkaline media, and they have displayed high stability in aqueous solutions, low detection limits, low oxidative potentials, and wide linear response. To explain the mechanism of glucose electro-oxidation, the most accepted hypothesis suggests that M 3+ OOH species obtained in alkaline media from M 2+ complexes act as a redox mediator for the electro-oxidation of glucose to obtain gluconolactone as former oxidation product [8,10,13,16,48], according to the following mechanism: LSV = linear sweep voltammetry.…”

Section: Electrochemical Sensing Of Dopaminementioning

confidence: 99%

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Recent Advances in the Use of Transition-Metal Porphyrin and Phthalocyanine Complexes as Electro-Catalyst Materials on Modified Electrodes for Electroanalytical Sensing Applications

Cruz-Navarro

Hernández-García

Mendoza-Huízar

et al. 2021

Solids

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Metalloporphyrins (MP) and metallophtalocyanines (MPc) are innovative materials with catalytic properties that have attracted attention for their application for diverse electrochemical purposes. The presence of metallic centers in their structure offers a redox-active behavior that is being applied in the design of solid electrodes for the quantification of biomolecules, water contaminants, and pharmaceuticals, among others. Herein, we collect the recent information about porphyrin and phthalocyanine complexes as modifiers of electrodes, and the important aspects of the design, characterization, and application of these electrodes.

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Binary NiCu oxide nanoparticles onto graphite as promoting nanocatalysts for ethanol electro‐oxidation process

Afify,

Hameed,

Ghayad

2024

Applied Organom Chemis

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A facile and reduced cost fabrication protocol was followed to have a series of nickel oxide nanospecies onto graphite support with introducing varied copper oxide wt.% values (NiCuO/T). The co‐precipitation of metallic hydroxide particles onto carbonaceous surfaces and their subsequent burning at 400°C were sufficient to prepare mixed transition metal oxides. Suitable analysis tools were exploited to fully characterize the obtained nanopowders using scanning electron microscopy, transmission electron microscopy, X‐ray diffraction spectroscopy, X‐ray photoelectron spectroscopy, and energy dispersive X‐ray analysis. Outstanding performances of the formed nanocatalysts for catalyzing ethanol electro‐oxidation reaction were measured especially in presence of 15 wt.% copper oxide content. The onset potential (Eonset) value of alcohol oxidation process was negatively shifted at dispersed NiO nanoparticles onto graphite after doping with copper oxide nanospecies. This promoted activity of prepared nanomaterials could be explained by their increased active sites when binary metallic oxides were incorporated. Electrochemical impedance spectroscopy studies demonstrated much lowered resistances in alkaline solution containing ethanol molecules to ascertain the enhanced behavior of NiCuO/T nanocatalysts. Moreover, their good stability attitude encouraged the application of doped nanomaterials with copper oxide for fuel cells application.

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Progress in the use of electrodes modified with coordination compounds for methanol electro-oxidation

Cited by 15 publications

References 88 publications

The Experimental Design Approach in Square‐Wave Voltammetric Determination of Tamoxifen by NiO‐CPE**

The Experimental Design Approach in Square‐Wave Voltammetric Determination of Tamoxifen by NiO‐CPE**

Recent Advances in the Use of Transition-Metal Porphyrin and Phthalocyanine Complexes as Electro-Catalyst Materials on Modified Electrodes for Electroanalytical Sensing Applications

Binary NiCu oxide nanoparticles onto graphite as promoting nanocatalysts for ethanol electro‐oxidation process

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