Electrocatalytic oxidation of monosaccharides on gold electrode in alkaline medium: Structure–reactivity relationship

Parpot, Píer; Nunes, Natércia; Bettencourt, Ana Paula

doi:10.1016/j.jelechem.2006.07.006

Cited by 46 publications

(43 citation statements)

References 19 publications

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“…3(f) shows a complicated CV curve, it is concluded that the catalytic oxidation of glucose at the Au-Ag alloy electrode is strongly dependent on individual oxidation and reduction states of Ag and Au components, especially when one compares the CV features of the undealloyed Au-Ag alloys in the presence and absence of glucose. The oxidation of glucose at the alloy electrode in the low potential region (−0.7 to −0.1 V) is ascribed to the electrocatalysis of Au component [20,21], while its oxidation in the high potential region (−0.1 to 0.8 V) to the electrocatalysis of Ag component [23].…”

Section: Electrocatalytic Activity Of Nanoporous Au and Au-ag Alloys mentioning

confidence: 99%

“…3(b) shows the CVs for the electrooxidation of glucose at the poly-Au electrode. During the anodic scan, two oxidation peaks were observed, the small one starting at ∼−0.7 V being attributed to the oxidation of the aldehyde hydrate (hemiacetal) at C1 carbon [20] and the large one centering around 0.18 V to the oxidation of primary alcohol group on a surface with higher OH − coverage [21]. During the cathodic scan, the glucose was re-oxidized on the partially oxidized Au surface followed by the partial reduction of surface gold oxides, giving an extended oxidation peak from 0.14 to −0.7 V.…”

Section: Electrocatalytic Activity Of Nanoporous Au and Au-ag Alloys mentioning

confidence: 99%

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Electrocatalytic oxidation of d-glucose at nanoporous Au and Au–Ag alloy electrodes in alkaline aqueous solutions

Liu

Huang

Zhang

et al. 2009

Electrochimica Acta

115

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Section: Electrocatalytic Activity Of Nanoporous Au and Au-ag Alloys mentioning

confidence: 99%

Section: Electrocatalytic Activity Of Nanoporous Au and Au-ag Alloys mentioning

confidence: 99%

Electrocatalytic oxidation of d-glucose at nanoporous Au and Au–Ag alloy electrodes in alkaline aqueous solutions

Liu

Huang

Zhang

et al. 2009

Electrochimica Acta

115

View full text Add to dashboard Cite

“…Ideally it is preferred that the oxidation products and electron balance be carried out at the same time to facilitate mechanistic studies. However, most researchers have focussed on one component, with Parpot et al reporting an impressive list of products after chromatographic analyses (see Table 1) [39][40][41]. From their studies of galactose oxidation on Au, they concluded that the process was catalysed by the presence of hydrous gold oxides as already described by others.…”

Section: Figmentioning

confidence: 84%

“…systematically investigated the oxidation of D-mannose, D-galactose, Dsorbitol, D-gluconic acid, D-glucose-6-phosphate, D-glucuronic acid, 1,6-anhydro-β-D-glucose, methyl-β-D-glucopyranoside and 2-deoxy-D-glucose in 0.1 M NaOH solution [39][40][41]. Their approach was based upon measuring the possible oxidation products rather than evaluate the number of electrons.…”

Section: Figmentioning

confidence: 99%

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Recent progress in electrochemical oxidation of saccharides at gold and copper electrodes in alkaline solutions

Torto

2009

Bioelectrochemistry

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Gold Nanoparticles on Layered Double Hydroxide Nanosheets and Its Electrocatalysis for Glucose Oxidation

Cho

Lee

Cho³

et al. 2016

Bulletin Korean Chem Soc

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The electrochemical oxidation reaction of glucose was extensively investigated for applications in glucose-oxygen fuel cells 1 and in glucose sensors. 2 The electrocatalytic oxidation of glucose in alkaline medium was studied using Cu, Ni, Fe, Pt, and Au electrodes.3 Among them, gold nanoparticles (Au NPs) have been intensively examined as the most attractive material for the electrocatalysis of glucose owing to their chemical stability, good biocompatibility, high catalytic activity, good antipoisoning property, and more negative oxidation potential compared to the other materials.2b-4 Although the high surface-to-volume ratio and high surface energy of Au NPs increase their catalytic performance, the fast aggregation of Au NPs during the catalytic process led the development of nanoscopic supporting materials to improve their practical applications. Recently, two-dimensional nanosheet of exfoliated layered double hydroxide (LDH) has emerged as a new type of solid support to immobilize the diverse metal NPs 5 because of the large metal hydroxide area, good biochemical stability, and highly charged positive potential of 1-to 2-nm thick LDH layers. LDHs consist of a continuous stack of positively charged metal hydroxide layers with counter anions and water molecules placed in interlayer spaces. The general formula of LDHs is expressed by2+ and M 3+ are divalent and trivalent metal ions, respectively, capable of occupying the octahedral holes of brucite-like layers. 6 The compositional flexibility and tunable layer charge have allowed LDHs to be useful in a wide variety of applications. Recently, sequentially assembled Au NPs/LDH nanosheet layers were used in glucose electrocatalysis, in which the catalyst was prepared by the layer-by-layer of Au NPs and LDH nanosheet.7 In this study, we synthesized a uniform nanocomposite of Au NPs and LDH nanosheet, denoted as Au/LDH nanosheet (inset photo in Figure 1(a)), by in situ chemical reduction with NaBH 4 , efficiently forming the spherical Au NPs in the diameter range of 2-10 nm on the entire surface of LDH nanosheet. The current method does not require additional organic stabilizers to prevent the aggregation of Au NPs and surface modifiers to immobilize the Au NPs on LDH surface. Importantly, the catalytic activity of Au/LDH nanosheet for the electrochemical oxidation reaction of glucose was also investigated. The Au/LDH nanosheet exhibited an excellent electrocatalytic activity, although very small amount of gold was used as an active material. Figure 1 shows the optical properties of the nanocomposite of Au NPs and LDH nanosheet. In general, the Au NPs exhibited a strong visible-light absorption ascribed to the surface plasmon resonance (SPR) effect, which directly corresponds to their size and shape, as well as the distribution on the supports. 8 For example, uniform and spherical Au NPs in aqueous solution exhibit a sharp and single extinction band at in the wavelength range of 520-530 nm, depending on the size. However, the large aggregates or nonspherical sha...

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Electrocatalytic oxidation of monosaccharides on gold electrode in alkaline medium: Structure–reactivity relationship

Cited by 46 publications

References 19 publications

Electrocatalytic oxidation of d-glucose at nanoporous Au and Au–Ag alloy electrodes in alkaline aqueous solutions

Electrocatalytic oxidation of d-glucose at nanoporous Au and Au–Ag alloy electrodes in alkaline aqueous solutions

Recent progress in electrochemical oxidation of saccharides at gold and copper electrodes in alkaline solutions

Gold Nanoparticles on Layered Double Hydroxide Nanosheets and Its Electrocatalysis for Glucose Oxidation

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