Study of the electrochemical behaviour of gold (111) vicinal faces situated on the [01] zone in aqueous solutions

Lecoeur, J.; Bellier, J.P.; Koehler, C.

doi:10.1016/0022-0728(92)80538-f

Cited by 29 publications

(12 citation statements)

References 20 publications

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“…In the case of gold, particular care should be taken to control the nature of the surface structure since this can be easily altered by the surface reconstruction phenomena [7,17]. For gold and silver, a lot of information has been gathered about the influence of the surface structure [17][18][19][20][21], specific adsorption and temperature [22][23][24][25][26][27] on the potential of zero charge.…”

Section: Introductionmentioning

confidence: 99%

Towards the understanding of the interfacial pH scale at Pt(1 1 1) electrodes

Rizo

Sitta

Herrero

et al. 2015

Electrochimica Acta

139

199

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Abstract.The determination of the potentials of zero total and free charge, pztc and pzfc respectively, were made in a wide pH range by using the CO displacement method and the same calculation assumptions used previously for Pt(111) electrodes in contact with nonspecifically adsorbing anions. Calculation of the pzfc involves, in occasions, long extrapolations that lead us to the introduction of the concept of potential of zero extrapolated charge (pzec). It was observed that the pztc changes with pH but the pzec is independent of this parameter. It was observed that the pztc>pzec at pH > 3.4 but the opposite is true for pH>3.4. At the latter pH both pzec and pztc coincide. This defines two different pH regions and means that adsorbed hydrogen has to be corrected in the "acidic" solutions at the pztc while adsorbed OH is the species to be corrected in the "alkaline" range. The comparison of the overall picture suggests that neutral conditions at the interface are attained at significantly acidic solutions than those at the bulk.

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Section: Introductionmentioning

confidence: 99%

Towards the understanding of the interfacial pH scale at Pt(1 1 1) electrodes

Rizo

Sitta

Herrero

et al. 2015

Electrochimica Acta

139

199

View full text Add to dashboard Cite

show abstract

“…The influence of the structure of the electrode surface on the pzc has been addressed numerous times in the past [4][5][6][7][8][9][10][11][12][13]. This was done first for gold and silver electrodes where the pzc can be easily determined by identifying the position of the minimum in the differential capacity curve, according to the Gouy-ChapmanStern model of the double layer [4,5,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Coulostatic potential transients induced by laser heating of platinum stepped electrodes: influence of steps on the entropy of double layer formation

Climent

Coles

Compton

et al. 2004

Journal of Electroanalytical Chemistry

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“…On the other hand, the work function of a metal surface varies linearly with the step density due to the Schmoluchowski effect [22]. The difference of the work functions of the (1,1,1) and the (7,5,5) orientations is of 115 mV [15]. This model permits to qualitatively explain that the surface is unstable towards the formation of domains.…”

mentioning

confidence: 70%

“…Succession of close-packed terraces and regular step bunches are clearly seen in figure 3. The structure of step bunches is expected to be (7,5,5) orientation from previous low energy electron diffraction (LEED) studies [15]. The (7,5,5) surface is also vicinal to (1,1,1) in the same zone axis.…”

mentioning

confidence: 97%

Periodic faceting of Au(4,3,3) observed by scanning tunneling microscopy

Pourmir

Rousset

Gauthier

et al. 1994

Microsc. Microanal. Microstruct.

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Résumé. 2014 Une surface vicinale de l'or (1,1,1), Au(4,3,3), a été étudiée par microscopie à effet tunnel dans l'ultra vide. Elle est thermiquement instable et facette pour des températures de recuit allant de 700 K à 1000 K. La surface facettée présente un état stable constitué d'une succession périodique de facettes ayant des orientations (1,1,1) et (7,5,5). La superpériode observée est d'environ 110 A avec une longueur de 40 Å pour la facette dense et ne varie pas dans la gamme de température utilisée. Plusieurs origines pouvant rendre compte de la stabilité particulière de la surface (7,5,5) et de la superpériode sont discutées.Abstract. 2014 The Au(4,3,3) surface, vicinal to Au(1,1,1), has been studied by scanning tunneling microscopy in ultra high vacuum. It is thermally unstable towards faceting. For annealing temperatures ranging from 700 K to 1000 K, the stable state of the faceted surface is found to be a periodic succession of (1,1,1) and (7,5,5) facets. The superperiod is about 110 Å and the length of the close-packed facet is about 40 Å. The occurence of the (7,5,5) facet is discussed in correlation with previous equilibrium shape observations. A model to qualitatively account for the periodic formation of facets is proposed.

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Study of the electrochemical behaviour of gold (111) vicinal faces situated on the [01] zone in aqueous solutions

Cited by 29 publications

References 20 publications

Towards the understanding of the interfacial pH scale at Pt(1 1 1) electrodes

Towards the understanding of the interfacial pH scale at Pt(1 1 1) electrodes

Coulostatic potential transients induced by laser heating of platinum stepped electrodes: influence of steps on the entropy of double layer formation

Periodic faceting of Au(4,3,3) observed by scanning tunneling microscopy

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