Graphene–gold nanostructure composites fabricated by electrodeposition and their electrocatalytic activity toward the oxygen reduction and glucose oxidation

Yao, Hang; Jin, Juan; Wu, Ping; Zhang, Hui; Cai, Chenxin

doi:10.1016/j.electacta.2010.09.021

Cited by 176 publications

(92 citation statements)

References 66 publications

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“…While Fleischmann et al [28,43] assumed catalytic/intermediate role for NiOOH, others [44,45] reported that methanol oxidation takes place after complete conversion of Ni(OH) 2 to NiOOH in the course of an anodic potential sweep. Vertes and Horanyi [46] criticized the Fleischmann mechanism and raised doubts on the role of NiOOH as an electrocatalyst.…”

Section: Resultsmentioning

confidence: 96%

Kinetic studies of glucose electrocatalytic oxidation on GC/Ni electrode

Danaee

Jafarian

Forouzandeh

et al. 2012

Int J of Chemical Kinetics

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Nickel-modified glassy carbon electrode (GC/Ni) prepared by galvanostatic deposition was used for the electrocatalytic oxidation of glucose in alkaline solutions where different electrochemical methods were employed. In cyclic voltammetry studies, in the presence of glucose an increase in the peak current of the oxidation of nickel hydroxide is followed by a decrease in the corresponding cathodic current. This suggests that the oxidation of glucose is being catalyzed through mediated electron transfer across the nickel hydroxide layer comprising nickel ions of various valence states. Under the chronoamperometric regime, the reaction followed a Cottrellian behavior and the diffusion coefficient of glucose was found to be 8 × 10 −6 cm 2 s −1 . A mechanism based on the electrochemical generation of Ni 3+ -active sites and their subsequent consumptions by glucose has been discussed, and kinetic parameters have been derived. The heterogeneous rate constants for the oxidation of glucose at the surface of modified electrodes were determined by rotating disk electrode using the Koutecky-Levich plots, which are in agreement with the data obtained by chronoamperometry. C 2012 Wiley Periodicals, Inc. Int J Chem

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Section: Resultsmentioning

confidence: 96%

Kinetic studies of glucose electrocatalytic oxidation on GC/Ni electrode

Danaee

Jafarian

Forouzandeh

et al. 2012

Int J of Chemical Kinetics

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“…Thus, AuNPs supported on high-area carbon materials such as carbon nanotubes or carbon black and, more recently, on graphene, have been used as electrocatalysts for O 2 reduction. [41][42][43][44][45][46][47][48][49][50][51][52][53][54] Tang et al investigated how Au particle size affects the ORR activity in a basic electrolyte. [41] They found that 3 nm Au clusters on a carbon support exhibited higher ORR activity, and also a four-electron reduction of O 2 occurred on these particles, whereas on 7 nm AuNPs the two-electron reduction to HO 2 À predominates.…”

Section: Introductionmentioning

confidence: 99%

Shape‐Dependent Electrocatalysis: Oxygen Reduction on Carbon‐Supported Gold Nanoparticles

et al. 2014

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Cubic, octahedral and quasi‐spherical (two different particle sizes) Au nanoparticles are synthesised and dispersed in a carbon‐black powder. The size and morphology of the Au nanocatalysts is confirmed by transmission electron microscopy and X‐ray diffraction. Au nanospheres are approximately 5 and 30 nm in diameter, whereas the size of Au octahedra and nanocubes is approximately 40–45 nm. The electrocatalytic activity of these carbon‐supported particles towards the oxygen reduction reaction (ORR) is studied in 0.5 M H2SO4 and 0.1 M KOH solutions by using the rotating‐disk‐electrode method. The specific activity (SA) for O2 reduction is measured, and the highest SA is observed for Au nanocubes supported on carbon. The highest mass activities are found for the smallest Au nanoparticles. Tafel analysis suggests that the mechanism of the ORR on shape‐controlled Au/C catalysts is the same as on bulk Au.

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“…The diffraction peaks at 25.48 and 43.48 were the pattern of carbon (002) and (100) from graphene [28]. Previous literature had reported that the characteristic diffraction peak of GO was at about 10.58 [29].…”

Section: Electrodeposition Of Aunps-rgo Composite and Characterizationmentioning

confidence: 96%

A Self‐assembled L‐Cysteine and Electrodeposited Gold Nanoparticles‐reduced Graphene Oxide Modified Electrode for Adsorptive Stripping Determination of Copper

Zhang

Huang

et al. 2017

Electroanalysis

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Glassy carbon electrode (GCE) modified with L-cysteine and gold nanoparticles-reduced graphene oxide (AuNPs-RGO) composite was fabricated as a novel electrochemical sensor for the determination of Cu 2 + . The AuNPs-RGO composite was formed on GCE surface by electrodeposition. The L-cysteine was decorated on AuNPs by self-assembly. Physicochemical and electrochemical properties of L-cysteine/AuNPs-RGO/GCE were characterized by scanning electron microscopy, atomic force microscopy, energy dispersive spectroscopy, Raman spectroscopy, X-ray diffraction, cyclic voltammetry and adsorptive stripping voltammetry. The results validated that the prepared electrode had many attractive features, such as large electroactive area, good electrical conductivity and high sensitivity. Experimental conditions, including electrodeposition cycle, self-assembly time, electrolyte pH and preconcentration time were studied and optimized. Stripping signals obtained from L-cysteine/ AuNPs-RGO/GCE exhibited good linear relationship with Cu 2 + concentrations in the range from 2 to 60 mg L À1 , with a detection limit of 0.037 mg L À1 . Finally, the prepared electrode was applied for the determination of Cu 2 + in soil samples, and the results were in agreement with those obtained by inductively coupled plasma mass spectrometry.

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Graphene–gold nanostructure composites fabricated by electrodeposition and their electrocatalytic activity toward the oxygen reduction and glucose oxidation

Cited by 176 publications

References 66 publications

Kinetic studies of glucose electrocatalytic oxidation on GC/Ni electrode

Kinetic studies of glucose electrocatalytic oxidation on GC/Ni electrode

Shape‐Dependent Electrocatalysis: Oxygen Reduction on Carbon‐Supported Gold Nanoparticles

A Self‐assembled L‐Cysteine and Electrodeposited Gold Nanoparticles‐reduced Graphene Oxide Modified Electrode for Adsorptive Stripping Determination of Copper

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