𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Oxygen overvoltage on bright gold—I

✍ Scribed by J.P. Hoare

Publisher
Elsevier Science
Year
1966
Tongue
English
Weight
609 KB
Volume
11
Category
Article
ISSN
0013-4686

No coin nor oath required. For personal study only.

✦ Synopsis

Oxygen overvoltage measurements have been made on Au/Au-O and Au/Au,08 electrodes in oxygen-saturated 2 N sulphuric acid solution. The rate-determining step in the reduction of oxygen on an Au/Au-O electrode is O,(ads) + e + O,-(ads), with an i,, of I.3 x lo-l1 A/cm*. An Au/Au-O electrode is a poly-electrode system, and the opencircuit corrosion current is 3.6 x 1O-8 A/cm%. Oxygen evolution could not be studied on an Au/Au-0 electode because the anodization process converts the electrode to an Au/Au,O, electrode. The Au/Au,Oll electrode is a single electrode system with an E0 of + 1.360 V, and the electrode process is the formation and reduction of Au,Os, AttaOs + 6H+ -I-6e z= 2Au + 3H80.

📜 SIMILAR VOLUMES

Oxygen overvoltage on bright gold—II. Br
Oxygen overvoltage on bright gold—II. Bright gold in H2O2-stabilized acid solutions
✍ J.P. Hoare 📂 Article 📅 1966 🏛 Elsevier Science 🌐 English ⚖ 436 KB

Oxygen overvoltage measurements were made on bright gold electrodes in oxygen saturated 2 N H,SO, solutions to which H,O, was added until the HsOp concentration was O-1 M. It was found that the H,O&abilired systems produced a much more 'reversible' electrode, most likely because steps involving the

Oxygen overvoltage on PtRh alloy electr
Oxygen overvoltage on PtRh alloy electrodes
✍ J.P. Hoare 📂 Article 📅 1969 🏛 Elsevier Science 🌐 English ⚖ 822 KB

Ahstraet-Oxygen overvoltage measurements were carried out on a series of Pt-Rb alloy electrodes in 2 N H,SO, solutions under conditions of both constant current and constant potential. The effect of electronic structure of the electrode material was detected on the rest potential and the kinetics of

On the cathodic overvoltage on aluminium
On the cathodic overvoltage on aluminium in cryolite-alumina melts—I
✍ Jomar Thonstad; Sverre Rolseth 📂 Article 📅 1978 🏛 Elsevier Science 🌐 English ⚖ 798 KB

When a constant cathodic current is applied to an aluminium electrode in a Na3A1F6-AlaO, melt at lOlO"C, the potential decreases gradually and linearly with the square root of time to more negative values. Pronounced potential oscillations occurred at cds above 2A/cm2 and the evolution of sodium gas

Electroreduction of oxygen on carbon-sup
Electroreduction of oxygen on carbon-supported gold catalysts
✍ Heiki Erikson; Gea Jürmann; Ave Sarapuu; Robert J. Potter; Kaido Tammeveski 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 493 KB

The electrochemical reduction of oxygen was studied on Au/C catalysts (20 and 30 wt%) in 0.5 M H 2 SO 4 and 0.1 M KOH solutions using the rotating disk electrode (RDE) method. The thickness of the Au/C-Nafion layers was varied between 1.5 and 10 m. The specific activity of Au was independent of cata