✍ Scribed by K.M. Gorbunova; L.I. Liamina
No coin nor oath required. For personal study only.
Comparison of the data on the reduction of hydrated iron oxide present in the form of a suspension in concentrated KOH solutions and of the hydroxide deposited on the cathode in the form of a compact film shows that in the latter case, along with the process of ferrite ion reduction from the solution, there occurs also a reduction in the solid phase; in both cases the reduction results in the formation of metallic iron.
The partial polarization curve of iron reduction (plotted from the data on the dependence of the current strength upon the rotation rate of the disk electrode) shows the regions of limiting diffusion currents for the ferrite ion corresponding to its reduction to hypoferrite ion and to the reduction of the latter to metallic iron.
A sharp decrease in the current over a narrow potential range (:1*25 to -1.30 V) is considered in conjunction with the data on the role of the point of zero charge hn the processes of reduction of anions and on the possibility of a co-deposition of alkali metal, as the reason for the shift in the potential of zero charge.
compare des don&es sur la reduction de l'oxyde de fer hydrate en suspension dans une solution concentree de potasse et sur celle d'un hydroxyde depose cathodiquement en f?lm compact. Dam le second cas, parallelement il la reduction de l'ion ferrite en solution, il y a reduction en phase solide, le fer mttallique &ant toujours le produit final. La courbe de polarisation partielle de reduction du fer (trac&e d'apres des dontrees sur I'inSuence de la vitesse de rotation de l'dlectrode a disque sur le courant) revele des regions de courant-limite de diffusion respectivement propres B la reduction de l'ion ferrite en ion hypoferrite et a celle de ce dernier en fer metallique. Une chute abrupte du courant dans un intervalle etroit de potential (-1,25 a -1,30 V) est interpret&e en relation avec des don&es sur le r81e du point de charge nulle dam le processus de reduction des anions et &on la possibilite d'une codeposition de metal alcalin.
Vergleich der Daten beziiglich der Reduktion von Qdratisiertem Eisenoxyd in Form eines Suspension in konzentrierten KOH-Liisungen und von Eisenhydroxyd, abgeschieden auf der Kathode in Form einer kompakten Schicht, zeigen, dam in letzterem Falle parallel mit dem Vorgang der Ferritionen-Reduktion aus der Losung such eine Reduktion in der festen Phase erfolgt ; *
📜 SIMILAR VOLUMES
has been delayed as a result of UN sanctions imposed on Serbia
The kinetics of hydrogen peroxide reduction were studied on iron in borate buffered and unbuffered solutions of pH ranging from 8.6 to 13.8, with and without the presence of chloride ions. A rotating disk electrode was employed. Measurements were taken using the linear sweep technique and the potent
The electrochemical behaviour of the Cd electrode in O-1-6 N NaOH has been investigated. Both the potentiostatic and galvanostatic techniques were employed. It has been shown that the electrode surface is primarily covered with a porous layer of Cd(OH), which is precipitated from the solution. Above
The potentiodynamic behaviour of iron in alkaline solutions under carefully controlled perturbation conditions reveals that the overall electrochemical process is more involved than was thought earlier. The electrochemical characteristics of the systems are explained through a series of successive c