The oxidation of allyl alcohol on Au-electrode in acidic electrolytes

Celdrán, R.; González‐Velasco, J.

doi:10.1016/0013-4686(81)90035-9

Cited by 12 publications

(12 citation statements)

References 18 publications

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“…In alkaline medium, at t = r the potential drops sharply to values close to that for H2 evolution and then increases. Similar behavior is observed for allyl alcohol on other metals (1).…”

Section: Methodssupporting

confidence: 80%

“…Procedures.--Cell, electrodes, apparatus, and activation method have been described elsewhere (1,2). The reactants were NaOH, K2SO4, H2SO4 (Merck, P.A.).…”

Section: Methodsmentioning

confidence: 99%

“…The circuit was then opened and the E-t curve recorded. The electrode was then activated (1) in the bulk solution and the I/E curve was recorded and compared with a standard I/E curve in order to check its catalytic activity. Thereafter, the electrode was polarized at Ea and allyl alcohol was added in N2 atmosphere, immediately prior to opening the circuit.…”

Section: Methodsmentioning

confidence: 99%

“…For this series, the allyl alcohol concentration, c, was varied from 10 -3 to 10-'M, and ta was varied from 4 to 45s. The catalytic activity of the WE was checked after each experiment as described (1). All potential values are expressed vs. SCE.…”

Section: Methodsmentioning

confidence: 99%

“…1) or as the time at which characteristic potential is reached. This po- October 1985 tential, which corresponds to zero oxygen coverage is given by E = 0.62 VscE for Au in acidic medium (1,18,26).…”

Section: Methodsmentioning

confidence: 99%

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Open‐Circuit Reduction of Oxygen Coverage on Au by Allyl Alcohol in Aqueous Electrolytes

Celdrán

González‐Velasco

1985

J. Electrochem. Soc.

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An open-circuit study of the reduction of oxygen coverage on Au by aUyl alcohol was made. The experimental results have been interpreted using Christov's scheme (15). The gold oxide coverage appears to be removed via a chemical, an electrochemical, or a mixed mechanism, depending on different potential values which characterize the diverse zones appearing in the E-t curves. Gold oxide reduction seems to take place through two steps in acidic electrolytes and through three in neutral ones. The first step appears to be the reduction of Au20:3 to AutO, the second a reduction of Au20 to Au, while the third has been interpreted as a reduction of an aged form of Au20.

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“…In alkaline medium, at t = r the potential drops sharply to values close to that for H2 evolution and then increases. Similar behavior is observed for allyl alcohol on other metals (1).…”

Section: Methodssupporting

confidence: 80%

“…Procedures.--Cell, electrodes, apparatus, and activation method have been described elsewhere (1,2). The reactants were NaOH, K2SO4, H2SO4 (Merck, P.A.).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Open‐Circuit Reduction of Oxygen Coverage on Au by Allyl Alcohol in Aqueous Electrolytes

Celdrán

González‐Velasco

1985

J. Electrochem. Soc.

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Electrooxidation mechanism of glyoxylic acid on Au polycrystalline electrodes in acidic medium

Ocón

Velasco

1998

Ber Bunsenges Phys Chem

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The electrooxidation mechanism of glyoxylic acid has been investigated on an Au polycrystalline electrode in acidic medium. The kinetic parameters deduced: Tafel slope, reaction order with respect to glyoxylic acid concentration, reaction order with respect to the pH, apparent activation enthalpy, entropy and Gibbs energy, and the final products detected after oxidation are in agreement with an electrooxidation mechanism beginning with an adsorption and a rate determining step in which the adsorbate becomes oxidized in a monoelectronic transfer reaction.

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The electrochemistry of gold: II the electrocatalytic behaviour of the metal in aqueous media

1998

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Although it is the noblest and most inert of metals, and is a very weak chemisorber, gold displays a very wide range of electrocatalytic activity -especially in base. Such unexpected behaviour is rationalized here in terms of the unusual properties of nanocluster, microparticles or quantum dots. Such species, present as defects at the metal surface, undergo oxidation at unusually low potentials (significantly lower than that of bulk gold) in a process known as premonolayer oxidation. The resulting low coverage (or incipient) oxide species are assumed to be the mediators for oxidation reactions while unoxidized active gold atoms, present at lower potentials, often act as the mediators for reduction. Electrocatalysis on noble metals is quite often confined to the double layer region and only low coverage metal atoms at active sites are involved. The enhanced activity of gold in base is readily rationalized in terms of a super-Nernstian E/pH effect. The unusual properties of metal nanoclusters may also be used to rationalize the surprisingly high level of catalytic activity of oxide-supported gold microparticles as reported recently by Haruta and co-workers.

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The oxidation of allyl alcohol on Au-electrode in acidic electrolytes

Cited by 12 publications

References 18 publications

Open‐Circuit Reduction of Oxygen Coverage on Au by Allyl Alcohol in Aqueous Electrolytes

Open‐Circuit Reduction of Oxygen Coverage on Au by Allyl Alcohol in Aqueous Electrolytes

Electrooxidation mechanism of glyoxylic acid on Au polycrystalline electrodes in acidic medium

The electrochemistry of gold: II the electrocatalytic behaviour of the metal in aqueous media

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