Hydrogen Overvoltage on Bright Platinum

Schuldiner, Sigmund

doi:10.1149/1.2427170

Cited by 77 publications

(44 citation statements)

References 8 publications

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“…On the other hand, Tafel reaction is also considered the rds for HER in acid media on smooth polycristalline Pt [15][16][17][18][19] and in porous Pt black [16].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen reaction at open circuit in alkaline media on Pt in a gas-diffusion electrode

Cabot

Alcaide

Brillas

2009

Journal of Electroanalytical Chemistry

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“…On the other hand, Tafel reaction is also considered the rds for HER in acid media on smooth polycristalline Pt [15][16][17][18][19] and in porous Pt black [16].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen reaction at open circuit in alkaline media on Pt in a gas-diffusion electrode

Cabot

Alcaide

Brillas

2009

Journal of Electroanalytical Chemistry

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“…The closeness of this curve with the Pt and Rh values at the higher current densities confirms that the surface coverage with active hydrogen is largely independent of the hydrogen partial pressure. The difference in slope between the values at 1 atm and at zero hydrogen partial pressure is due to the effects of both the electrochemical desorption in the hydrogen-free solution and the presence of some back reaction in the hydrogensaturated solution (3).…”

Section: Discussionmentioning

confidence: 98%

“…Hence the (1-Oo) term in Eq. [3] and [5] will reduce to unity and Eq. The measured polarization values for Rh shown in Fig.…”

Section: April 1961mentioning

confidence: 99%

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Kinetics of Hydrogen Evolution at Zero Hydrogen Partial Pressure

Schuldiner¹

1961

J. Electrochem. Soc.

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Polarization curves for the hydrogen evolution reaction on platinum and rhodium were determined in 1M H2SO4 solution stirred rapidly with helium.Here the partial pressure of hydrogen gas above the solution was virtually equal to zero. Experimental results indicated that for both metals the ratedetermining step in the lowest current density range was primarily the electrochemical desorption of hydrogen atoms. As the current density increased the rate-determining step changed to one that was primarily controlled by atomic combination. Kinetic equations were derived and the calculated relationships compared favorably with the experimental results.When the partial pressure of hydrogen on an inert hydrogen electrode, e.g., Pt/H~, is dropped to zero, the reversible 2H++ 2e-= H~ reaction no longer occurs on the metal surface. If under these conditions the noble metal electrode is cathodized, hydrogen will be evolved, and if the hydrogen partial pressure above the solution is maintained virtually equal to zero, by sweeping out the evolved hydrogen with an inert gas, as fast as it is formed, the rate of the reverse ionization reaction will effectively be equal to zero. Breiter and Clamroth (1) used this fact to study the hydrogen evolution rate-determining steps on Pt and Au electrodes. In this investigation this technique, with rigorous control of electrode cleanliness and precision of potential measurements, was used to determine the rate-controlling steps on Pt and Rh electrodes.

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“…Evidence that not all of the (H) is critical for the exchange has been shown for Hi evolution on Rh (11) and Pt (12) and for H accumulation on Pt (8). In these cases, less than 10% of the total (H) present at 0V was shown to be responsible for the exchange reaction, even though six H oxidation regions were found and coverage was slightly greater than one monolayer.…”

Section: Initial ] Estimatesmentioning

confidence: 99%

Tafel Constants and Changes in Hydrogen Coverage during Corrosion of Fe18Cr

Rosen¹,

Harris²

1983

J. Electrochem. Soc.

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Cathodic Tafel constants associated with the hydrogen reaction at Fel8Cr in H2-saturated 1N H.~SO4 were determined by computer analysis of the potential decay following current interruption at fixed starting potentials positive to the corrosion potential. The values of b = -2.3 RT/aF were evaluated from the general current-interruptive equation, E = Ei + b 9 log [1 + t/v], from its linear log form. and from a modification of the general equation that was derived to analyze multiple TafelElectrochemical Society Active Member.

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Hydrogen Overvoltage on Bright Platinum

Cited by 77 publications

References 8 publications

Hydrogen reaction at open circuit in alkaline media on Pt in a gas-diffusion electrode

Hydrogen reaction at open circuit in alkaline media on Pt in a gas-diffusion electrode

Kinetics of Hydrogen Evolution at Zero Hydrogen Partial Pressure

Tafel Constants and Changes in Hydrogen Coverage during Corrosion of Fe18Cr

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