The electro-oxidation of glycerol on the gold(100)-oriented single-crystal surface and poly crystalline surface in 0.1 M NaOH

Avramov-Ivić, M.; Léger, Jean‐Michel; Lamy, C.; Jović, V.D.; Petrović, Slobodan

doi:10.1016/0022-0728(91)85075-z

Cited by 64 publications

(54 citation statements)

References 11 publications

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“…[25,26] The main reason for the high catalytic activity of gold is the lower propensity of gold to form surface oxides, which inhibitt he alcohol oxidation activity. [27][28][29] Therefore, the highc atalytic activity of gold for the electrochemical oxidationo fa lcohols in alkaline media has little to do with special catalytic properties of gold, but rather with the favorable reaction conditions in solution (i.e. effect of the pH in decoupled proton-electron transfer steps) [7] combined with the low tendency of gold to become poisoned by either CO or surface oxides( i.e.…”

Section: Introductionmentioning

confidence: 99%

“…[24] In particular,t he role of the surface structure of gold towards the oxidation of methanol, ethanol and glycerol has been underlooked and scarce contributions can be found in the literature [22,[27][28][29][30][31][32][33] Additionally,e ven fewer contributions have been published dealing with the alcohol oxidation on nanoparticulated systems. [34][35][36] Consequently,t he aim of this work is to explore the electrocatalytic properties of two shape-controlledA un anoparticles towards the oxidation of formaldehydea nd some alcohols, including methanol, ethanol, and glycerol, in alkaline solution.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Oxidation of Small Organic Molecules on Au Nanoparticles with Preferential Surface Orientation

et al. 2015

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The surface orientation effect on the oxidation of small organic molecules such as methanol, formaldehyde, ethanol, and glycerol has been studied on Au nanoparticles in alkaline medium. Two sets of Au nanoparticles enriched in (100) and (111) facets were synthetized by using colloidal methods in presence of cetyltrimethylammonium bromide. The nanoparticles were physically characterized by using TEM and XRD and electrochemically characterized by using Pb underpotential deposition as a surface‐structure probe. It is reported that, although methanol oxidation was similar in both types of nanoparticles, the oxidation of formaldehyde presented a clear surface orientation effect. For this reaction, nanoparticles with (111) preferential orientation presented higher current densities at low potentials, whereas Au(100) nanoparticles exhibited higher activity at potentials more positive than 1.0 V versus RHE. On the other hand, for glycerol and ethanol oxidations, the onset of the reaction was similar in both types of particles, although Au(111) nanoparticles showed higher current densities than the Au(100) ones.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Oxidation of Small Organic Molecules on Au Nanoparticles with Preferential Surface Orientation

et al. 2015

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“…Also, with the increase of the scan rate the potential was negatively shifted. The varied potential may represent an alteration in the gold surface due to the interaction with glycerol and OH ions [34]. However, no clear evidence was observed in the voltammogram for the formation of oxidase compounds.…”

Section: Trends In Green Chemistry Issn 2471-9889mentioning

confidence: 97%

“…Also, with the increase of scan rate the potential is negatively shifted. The varied potential may represent both an alteration in the Zn-Au surface due to the interaction with glycerol and OH -ions [34], and the interaction between gold and zinc that shifted the potential to negative values, this possibly related to the negative electrochemical potential of zinc and possible side reaction of zinc in alkaline media forming zinc oxide and zinc hydroxide both with larger negative potential than zinc as shown in Equation 2. However, the actual presence of these reactions was not characterized in detail in this study.…”

Section: Figurementioning

confidence: 99%

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A Practical Approach in Glycerol Oxidation for the Development of A Glycerol Fuel Cell

Pulido¹,

Kortenaar²,

Hurink³

et al. 2017

Trends in Green chem

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Mechanism of the Catalytic Oxidation of Glycerol on Polycrystalline Gold and Platinum Electrodes

2011

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This paper addresses the oxidation mechanism of glycerol on Au and Pt electrodes under different pH conditions. Intermediates and/or reaction products were detected by using an online high‐performance liquid chromatography technique (for soluble products) and online electrochemical mass spectrometry (for CO2). In alkaline media, the main product of glycerol oxidation on the Pt electrode is glyceric acid produced via glyceraldehyde. Glyceric acid is the primary oxidation product on the Au electrode, which is further oxidized to glycolic acid and formic acid at high potentials (≥0.8 V), yielding high current densities. As the pH of the solution is lowered, the glycerol oxidation becomes significantly more sluggish on both Au and Pt electrodes, which results in glyceraldehyde being the main oxidation product under neutral conditions, especially on gold. In acidic solutions, only the Pt electrode shows catalytic activity with a relatively low conversion rate, mainly to glyceraldehyde. At positive potentials corresponding to the formation of a Pt surface oxide, the PtOx surface oxide catalyzes the conversion of glyceraldehyde finally to formic acid and CO2, but only under acidic conditions. Gold catalyzes glycerol oxidation only under alkaline conditions, in contrast to a “real catalyst,” that is, platinum, which catalyzes glycerol oxidation over the entire pH range.

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The electro-oxidation of glycerol on the gold(100)-oriented single-crystal surface and poly crystalline surface in 0.1 M NaOH

Cited by 64 publications

References 11 publications

Electrochemical Oxidation of Small Organic Molecules on Au Nanoparticles with Preferential Surface Orientation

Electrochemical Oxidation of Small Organic Molecules on Au Nanoparticles with Preferential Surface Orientation

A Practical Approach in Glycerol Oxidation for the Development of A Glycerol Fuel Cell

Mechanism of the Catalytic Oxidation of Glycerol on Polycrystalline Gold and Platinum Electrodes

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