Electrocatalytic oxidation of glucose at gold nanoparticle-modified carbon electrodes in alkaline and neutral solutions

Tominaga, Masato; Shimazoe, Toshihiro; Nagashima, Makoto; Taniguchi, Ikuo

doi:10.1016/j.elecom.2004.12.006

Cited by 240 publications

(159 citation statements)

References 15 publications

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“…In the literature, the electrocatalytic oxidation of glucose in alkaline medium was studied on Cu, Ag-Au, Au-Pt, Ag, Pt and Au materials [21][22][23][24][25][26][27][28][29][30][31]. In alkaline and neutral media, gold appeared as an excellent electrocatalyst for several saturated oxygenated organic compounds due to its catalytic activity at low potentials compared to the other catalysts in the same conditions [22,25,30]. In addition, Vuyyuru et al [32] showed that Au has a better catalytic activity than Pt, Pd, Ru and Rh for biomassderived 5-hydroxymethylfurfural at pH 13.…”

Section: Introductionmentioning

confidence: 99%

Shape-dependent electrocatalytic activity of free gold nanoparticles toward glucose oxidation

et al. 2013

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The synthesis of shape and size-controlled free gold nanoparticles (AuNPs) was achieved by wet chemical methods. The UV-vis spectroscopy measurements and transmission electron microscopy characterizations confirmed the fine distribution in size and shape of the AuNPs. The zeta potential measurements permitted the evaluation of the stability of the AuNPs suspension. For the first time, the shape dependence on the electrocatalytic activity of these NPs is thoroughly investigated. The underpotential deposition (UPD) of lead reveals that their crystallographic facets are affected by their shape and growth process. Moreover, the glucose oxidation reaction strongly depends on the shape of AuNPs. Indeed, the gold nanocuboids (GNCs) and the spherical gold nanoparticles (GNSs) are significantly more active than the gold nanorods (GNRs) followed by the polyhedrons (GNPs). The oxidation process occurs at low potential for GNCs whereas the current densities are slightly higher for GNSs electrodes. Most importantly, the control of the shape and structure of nanomaterials is of high technological interest because of the strong correlation between these parameters and their optical, electrical and electrocatalytic properties.

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Section: Introductionmentioning

confidence: 99%

Shape-dependent electrocatalytic activity of free gold nanoparticles toward glucose oxidation

et al. 2013

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“…Although the direct oxidation has several advantages, such as easy electrode preparation, long device lifetime and high thermodynamic efficiency in fuel cell applications, it has not been well investigated, and only a few significant works address this subject [3,4].…”

Section: Introductionmentioning

confidence: 99%

Alkaline glucose oxidation on nanostructured gold electrodes

et al. 2010

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The electrocatalytic properties of nanostructured gold electrodes for glucose electro-oxidation in KOH were investigated by cyclic voltammetry and compared with a commercially available polycrystalline gold electrode. These electrodes were prepared by depositing gold nanoparticles from a sol onto different carbonaceous conductive supports: glassy carbon, carbon cloth and graphite paper. The gold sol was prepared reducing an aqueous solution of tetrachloroauric acid with sodium borohydride. In order to improve gold nanoparticle adhesion, the substrate surfaces were treated with warm concentrated nitric acid. Gold on treated carbon cloth turned out to be a very promising anode for glucose electro-oxidation. In order to better understand the glucose oxidation its pH dependence as well as sorbitol (the glucose reduction product) electroxidation were investigated.

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“…Therefore, the active site and the electrode form a complex, which is capable of strip ping electrons from glucose (Kokoh et al, 1992;Park et al, 2003). Previous observation shows that 18 electrons can be extracted (Tominaga et al, 2005). In this case, the GOx acts as a bridge (Tominaga et al, 2005) between glucose and the electrode.…”

Section: Resultsmentioning

confidence: 93%

“…Previous observation shows that 18 electrons can be extracted (Tominaga et al, 2005). In this case, the GOx acts as a bridge (Tominaga et al, 2005) between glucose and the electrode. These two possible processes may individually or collectively contribute the observed enhanced oxidation current.…”

Section: Resultsmentioning

confidence: 98%