Specificity of the kinetics of H2 evolution to the structure of single-crystal Pt surfaces, and the relation between opd and upd H

Barber, J.; Morin, Sylvie; Conway, B. E.

doi:10.1016/s0022-0728(97)00652-9

Cited by 184 publications

(76 citation statements)

References 29 publications

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“…For the reaction in which the Heyrovsky or Volmer step is the reaction step, the Tafel slope is 2F/RT (120 mV dec −1 ). When the Tafel reaction is the rate determining step, the Tafel slope is F/2RT (30 mV dec −1 ) [26]. Thus, it is possible to identify the reaction mechanism of the Tafel step from the Tafel slope.…”

Section: Mechanism Of the Catalytic Processmentioning

confidence: 99%

Electrocatalysts for hydrogen oxidation and evolution reactions

Zhuang

2016

Sci. China Mater.

150

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Section: Mechanism Of the Catalytic Processmentioning

confidence: 99%

Electrocatalysts for hydrogen oxidation and evolution reactions

Zhuang

2016

Sci. China Mater.

150

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“…[38][39][40][42][43][44][45] Hydrogen reactions were intensively investigated on polycrystalline Pt as well as on single-crystal surfaces. Markovic et al [22,23] and Barber et al [21,24] found that the reactivity of different Pt(hkl) surfaces towards hydrogen reactions is strongly influenced by surface orientation. It was clearly shown that in alkaline as well as acidic electrolytes the reactivity increases in the following order: (111) < (100) < (110) and that the activation energy decreases in the sequence DH (111) > DH (100) > DH (110) .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Reactivity for Hydrogen Reactions at Pt Nanoislands on Au(111)

2010

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We report high exchange current densities exceeding 1 A cm(-2) at Pt nanostructures on Au(111) for hydrogen-related reactions. Such activity is found at Pt nanoparticles with a coverage of less than 10 % of a monolayer on Au(111) and on single Pt particles deposited on Au(111). Potential pulse technique as well as micropolarization curves with overpotentials of +/-10 mV were used in the case of extended nanostructured surfaces to determine the activity. Single Pt particles were investigated in an in situ electrochemical scanning tunneling microscope setup using the STM tip as local sensor. The reactivity obtained on Pt nanostructured Au(111) towards hydrogen reactions were subsidized by single particle reactivity measurements. The specific activity of platinum is enhanced by more than a factor of 1000 as compared to a Pt(111) single crystal. Aspects that may explain this enhancement such as an involvement of the substrate, highly reactive defect sites and enhanced mass transport are discussed.

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“…For this reason, the kinetic aspects of hydrogen electrode reactions widely discussed in several papers and monographs, can be ignored when this electrode is used as a reference electrode [4,8,9,13,[47][48][49][50][51][52].…”

Section: Use Of the Hydrogen Electrodementioning

confidence: 99%

Reference Electrodes in Metal Corrosion

Szabó

Bakos

2010

International Journal of Corrosion

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With especial regard to hydrogen electrode, the theoretical fundamentals of electrode potential, the most important reference electrodes and the electrode potential measurement have been discussed. In the case of the hydrogen electrode, it have been emphasised that there is no equilibrium between the hydrogen molecule (H 2 ) and the hydrogen (H + ), hydronium (H 3 O + ) ion in the absence of a suitable catalyst. Taking into account the practical aspects as well, the theorectical basis of working of hydrogen, copper-copper sulphate, mercury-mercurous halide, silver-silver halide, metal-metal oxide, metal-metal sulphate and "Thalamid" electrodes, has been discussed.

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Specificity of the kinetics of H2 evolution to the structure of single-crystal Pt surfaces, and the relation between opd and upd H

Cited by 184 publications

References 29 publications

Electrocatalysts for hydrogen oxidation and evolution reactions

Electrocatalysts for hydrogen oxidation and evolution reactions

Enhanced Reactivity for Hydrogen Reactions at Pt Nanoislands on Au(111)

Reference Electrodes in Metal Corrosion

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