Über den elektrochemischen aufbau und abbau von sauerstoff- und wasserstoff-belegungen auf platin in wässriger lösung

Dietz, H.; Göhr, H

doi:10.1016/0013-4686(63)80064-x

Cited by 36 publications

(5 citation statements)

References 9 publications

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“…(1) or (4) is for cathodic O 2 electroreduction on a Pt/PtO surface. A surface cyclic voltammogram (not shown here) of the cathode showed that when the cathode potential is >∼0.8 V (versusNHE) (low fuel cell current density range), the Pt catalyst surface will be covered partially by a PtO layer with surface coverage of ∼0.3 [33][34][35]. Only when the cathode potential is lower than 0.8 V (high current density range), will the catalyst surface be pure Pt.…”

Section: Kinetic Parametersmentioning

confidence: 98%

PEM fuel cell open circuit voltage (OCV) in the temperature range of 23°C to 120°C

Zhang

Tang

Song

et al. 2006

Journal of Power Sources

211

116

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Section: Kinetic Parametersmentioning

confidence: 98%

PEM fuel cell open circuit voltage (OCV) in the temperature range of 23°C to 120°C

Zhang

Tang

Song

et al. 2006

Journal of Power Sources

211

116

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“…7). In this potential region (0.2-0.0v) hydrogen is adsorbed at the electrode (45)(46)(47)(48)(49)(50). At 0.1v hydrogen adsorption already amounts (46) to ~180 ~coul/cm 2.…”

Section: May I967mentioning

confidence: 99%

The Role of Hydrogen Peroxide in Oxygen Reduction at Platinum in H[sub 2]SO[sub 4] Solution

Damjanović

Genshaw

Bockris

1967

J. Electrochem. Soc.

159

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The rotating disk electrode with a concentric ring is used to analyze the role of H2O2 in the reduction of O2 to H2O in acid solutions. No H2O2 is formed as an intermediate in the reaction path of oxygen reduction to water. Only when the residual impurities from the not sufficiently purified solutions are adsorbed at the electrode does a parallel reaction path appear in which H2O2 is formed as an intermediate that does not reduce further to H2O with any significant rate. The mechanism of O2 reduction to H2O involves a first charge transfer step as rate‐controlling under Temkin conditions of adsorption.

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“…Results are interpreted in terms of surface modification due to partial reduction of the oxide layer, with the formation of a strained lattice containing dissolved oxygen and with a high density of surface defects (16).…”

mentioning

confidence: 99%

Oxygen Reduction on Active Platinum in 85% Orthophosphoric Acid

Appleby

1970

J. Electrochem. Soc.

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The oxygen reduction reaction on platinum that has been anodized, followed by reduction at 500 mV, has been studied in 85% orthophosphoric acid over a wide temperature range. This anodized platinum surface is more active for oxygen reduction than annealed reduced platinum in the 850–950 mV potential range and has a higher Tafel slope (1.79 RT/F at 25°C, compared to 1.04 RT/F for the annealed surface). Activation energy at the reversible potential is 14.9±1.5 normalkcal . It is suggested that the rate‐determining step on this surface is S+O2+H++e−→SO2H under conditions in which the adsorption of the product is close to Langmuirian. Hydrogen peroxide is not appreciably involved in the reduction mechanism. These results are interpreted in terms of the surface structure of the electrode after oxide reduction.

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Über den elektrochemischen aufbau und abbau von sauerstoff- und wasserstoff-belegungen auf platin in wässriger lösung

Cited by 36 publications

References 9 publications

PEM fuel cell open circuit voltage (OCV) in the temperature range of 23°C to 120°C

PEM fuel cell open circuit voltage (OCV) in the temperature range of 23°C to 120°C

The Role of Hydrogen Peroxide in Oxygen Reduction at Platinum in H[sub 2]SO[sub 4] Solution

Oxygen Reduction on Active Platinum in 85% Orthophosphoric Acid

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