Surface electrochemistry of CO on Pt(110)-(1 × 2) and Pt(110)-(1 × 1) surfaces

Markovic, N. M.; Grgur, Branimir N.; Lucas, C. A.; Ross, Philip N.

doi:10.1016/s0039-6028(97)00252-5

Cited by 127 publications

(124 citation statements)

References 35 publications

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“…In electrochemical environments, the effect of the cooling step was highlighted using synchrotron radiation [46]. It was found that the surface structure was dependent of the cooling rate under reductive conditions: fast cooling would lead to the (1×1) structure and sharp voltammetric peaks in the hydrogen region, whereas slow cooling would result in the (2×1) reconstruction and broader peaks, but appearing in the same potential region [52]. This constant value of the peak potential is makes difficult to electrochemically discriminate one of the two structures in an absolute way.…”

Section: Oxidation Of Formic Acid On Pt(110) Modified Electrodesmentioning

confidence: 99%

Fundamental aspects of HCOOH oxidation at platinum single crystal surfaces with basal orientations and modified by irreversibly adsorbed adatoms

Boronat-González

Herrero

Feliu

2013

J Solid State Electrochem

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Abstract.Oxidation of formic acid at Pt(hkl) electrodes with basal orientations and modified by irreversibly adsorbed adatoms is revisited. It was shown that the adatoms of the nitrogen group could enhance the electrocatalytic activity through long range electronic effects in the case of Pt (111) substrates or through shorter third body effects when adsorbed at Pt(100) electrodes. In both cases it appears that free platinum sites were required. Special attention is given here to the reactivity at Pt(110) substrates. It is found that maximum electrocatalysis is observed at fully blocked surfaces. This result points out again structure sensitivity effects for this characteristic reaction. Unlike the more compact planes, in which the enhancement of the oxidation rate was explained through essentially rigid models for the adlayer, it is suggested that the resulting enhancement observed at Pt(110) substrates could be explained if some adatom mobility is considered.

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Section: Oxidation Of Formic Acid On Pt(110) Modified Electrodesmentioning

confidence: 99%

Fundamental aspects of HCOOH oxidation at platinum single crystal surfaces with basal orientations and modified by irreversibly adsorbed adatoms

Boronat-González

Herrero

Feliu

2013

J Solid State Electrochem

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“…This is because the values of E onset of CO ad oxidation on Pt are lower than those on Pd. [23][24][25] The MOR activity of Pd, which is estimated by j P , is lower than that of Pt except the case of Ref. 5 where 1 M HClO 4 is used.…”

Section: Resultsmentioning

confidence: 96%

Structural Effects on Methanol Oxidation on Single Crystal Electrodes of Palladium

2017

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Methanol oxidation reaction (MOR) has been studied on the low index planes of Pd (Pd(111), Pd(100) and Pd (110)) in 0.1 M HClO 4 using voltammogram. Onset potential of methanol oxidation increases as Pd (110)~Pd(100) < Pd(111). The activity for the MOR is estimated using anodic peak current density of the voltammograms. The order of the activity is Pd(111)~Pd(110) B Pd(100): (100) surface enhances the activity for the MOR on Pd electrodes.

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“…Pt(110) has (1 © 1) or (1 © 2) structures depending on the annealing and cooling conditions. [19][20][21] The interlayer spacing between the first and the second layer d 12 is expanded in the adsorbed hydrogen region on all the low index planes of Pt, however the values of d 12 are identical with those in the bulk single crystal electrodes in the double layer region. [17][18][19] The study was extended to the high index planes of Pt.…”

Section: Introductionmentioning

confidence: 99%