An investigation of the oxidation of formaldehyde on noble metal electrodes in alkaline solutions by electrochemically modulated infrared spectroscopy (emirs)

Avramov-Ivić, M.; Adzic, R. R.; Bewick, A.; Razaq, M.

doi:10.1016/0022-0728(88)80320-6

Cited by 46 publications

(34 citation statements)

References 11 publications

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“…Even thought he differences are subtle, it is important to note that the octahedral nanoparticles present slightly higher current densities between 0.75 and 0.9 V, whereas, at higher potentials, the cubic nanoparticles present ah igher catalytic activity.I ti sw idely accepted that the most important reactive intermediate species during the oxidation of methanoli sf ormaldehyde. [29] In this regard, Figure 3B reports the voltammetric responses obtained on both types of Au nanoparticles towards the direct oxidation of this intermediate (formaldehyde). Clear similarities can be found between methanol and formaldehyde electrochemical oxidations.…”

Section: Electrochemical Oxidation Of Carbonm Onoxide Methanol and mentioning

confidence: 99%

“…0.3 Vv s. RHE), the current densities obtained on the (111)p referentially oriented nanoparticles are, in both cases, highera t low potentials( up to 0.95 V), whereas the Au cubic nanoparticles are more active at potentials higher than 1.0 V. Previous FTIR measurements have indicatedt hat formate is the final product of the oxidation of formaldehyde when the potential is limited to 1.5Vand cannot be furtheroxidized. [29,31,54,55] …”

Section: Electrochemical Oxidation Of Carbonm Onoxide Methanol and mentioning

confidence: 99%

“…As the adsorption and oxidation of small organic molecules have shown surface-structure sensitivity, [22,[24][25][26][27][28][29][30] it is expected that the adsorption of C2 and C3 molecules might also be affected by the surfaceorientation of the electrocatalyst.…”

Section: Electrochemical Oxidation Of Ethanol and Glycerolmentioning

confidence: 99%

“…[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: Electrochemical Oxidation Of Carbonm Onoxide Methanol and mentioning

confidence: 99%

Section: Electrochemical Oxidation Of Carbonm Onoxide Methanol and mentioning

confidence: 99%

Section: Electrochemical Oxidation Of Ethanol and Glycerolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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Nanoporous Pt Catalyst Modified by Sn Electrodeposition for Electrochemical Oxidation of Formaldehyde

Zuo

2012

Chin. J. Chem.

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A nanoporous Pt particles-modified Ti (nanoPt/Ti) electrode was prepared through a simple hydrothermal method using aqueous H 2 PtCl 6 as a precursor and formaldehyde as a reduction agent. The nanoPt/Ti electrode was then modified with limited amounts of tin particles generated by cyclic potential scans in the range of formaldehyde oxidation can be illustrated by a so-called bifunctional mechanism which is involved in the oxidation of poisoning adsorbed CO species via the surface reaction with OH adsorbed on neighboring Sn sites.

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Comparative Study of the Synthesis of sub‐10 nm Carbon‐Supported Gold Nanoparticles and their Suitability for Methanol Electrooxidation in Alkaline Media

2022

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Gold nanoparticles where synthesized and supported on carbon, or directly synthesized on carbon according to five different methods reported in literature, aiming at particles<10 nm. Characterization was done with transmission electron microscopy and thermogravimetric analysis. Although all syntheses yielded particles with an average diameter<10 nm, the formation of few very large particles, where a relatively large amount of Au is buried, as well as loss during the supporting procedure led to the exclusion of four of the five tested methods for further studies. The most promising AuNPs supported on carbon where tested for the methanol electrooxidation (MEO) in alkaline media. Four different Au‐loadings where realized, and supporting led to moderate particle growth depending on the loading. To compare MEO activity of the samples with different Au‐loadings a conversion factor was developed where the MEO activity can be compared in terms of NP size and Au‐loading.

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An investigation of the oxidation of formaldehyde on noble metal electrodes in alkaline solutions by electrochemically modulated infrared spectroscopy (emirs)

Cited by 46 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

Nanoporous Pt Catalyst Modified by Sn Electrodeposition for Electrochemical Oxidation of Formaldehyde

Comparative Study of the Synthesis of sub‐10 nm Carbon‐Supported Gold Nanoparticles and their Suitability for Methanol Electrooxidation in Alkaline Media

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