Anodic oxygen evolution reaction at high temperatures in acid solutions at platinum
โ Scribed by L.B. Kriksunov; L.V. Bunakova; S.E. Zabusova; L.I. Krishtalik
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 604 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0013-4686
No coin nor oath required. For personal study only.
โฆ Synopsis
Attstrae-The polarization curves of oxygen evolution and reduction at platinum electrode were obtained in diluted aqueous solutions of sulfuric and perchloric acids in the temperature range 2&325"C. The Tafel slopes of polarization curves of oxygen evolution are practically independent of the temperature in the whole investigated temperature range. The strong dependence of the transfer coeftlcient upon the temperature is discussed in terms of the influence of adsorption of intermediates on the reaction kinetics. At highest temperatures, a rest potential was observed which may correspond to the reversible oxygen potential.
๐ SIMILAR VOLUMES
A&act -Kinetic parameters were determined for the oxygen evolution reaction on 50-50 atom percent alloys of Ru-Ir, Ru-Pt, and Ir-Pt and compared with results obtained using ruthenium, iridium, platinum, and RuO,,TiO, electrodes. The potentiostatic studies were made on oxide covered electrodes at 80ยฐ
Oxygen evolution reaction at Rt electrodes in alkaline solutions is characterized by two linear E-log i relationships. At low current densities (cd), the Tafel slope is close to 60 mV, whereas at bigb cd, it is close to 120 mV. The rates at bigb cd are strongly affected by the presence of an anodic
Optical rotatory dispersion studies have been carried out at, temperatures up to 150ยฐC. on poly(ybenzy1 Lgliitamate) in a-chloronaphthalene and N-methylcaprolactam, and on poly-6-carbobeiixoxy-L-lysine, poly-6-carbobenzoxy-Lo1 nithine, and poly(bg1utamic acid) in N-methylacetamide. The h3offittrYang
Potentiostatic and galvanostatic pulse measurements were carried out to investigate the anodic oxygen evolution at platinum electrodes in IN I&SO4 in dependence on the oxide layer thickness d and the electrode potential F. The thickness d (1 .%I0 A) was obtained from cathodic charging curves. Furthe