Iron oxide electrodes

Giordano N, Passalacqua E, Antonucci V, Bart JCJ (1983) Iron oxide electrodes for photoelectrolysis of water. Int J Hydrogen Energy 10 763-766... 

Synthesis gas production. Alqahtany et al.92 have studied synthesis gas production from methane over an iron/iron oxide electrode-catalyst. Although the study was essentially devoted to fuel cell operation, for purposes of comparison some potentiometric work was performed at 950°C. It was found that under reaction conditions Fe, FeO or Fe304 could be the stable catalyst phase. Hysteresis in the rates of methane conversion were observed with much greater rates over a pre-reduced surface than over a pre-oxidised surface possibly due to the formation of an oxide. 

Fig. 19. Steady-state log j-E curves for oxygen reduction at iron oxide electrodes in 1M NaOH...

P.A. Castro, E.R. Vago, E.J. Calvo, Surface electrochemical transformations on spinel iron oxide electrodes in aqueous solutions, J. Chem. Soc. Faraday Trans. 92 (1996) 3371—3379. 

Turner, J.E., Hendewerk, M., Parmeter, J., Neiman, D., Somorjai, G.A. The characterization of doped iron-oxide electrodes for the photodissociation of water - stability, optical, and electronic-properties. J. Electrochem. Soc. 131, 1777 (1984)... 

Ferrocene containing condensation polymers have been utilized by us to modify the surfaces of electrodes.Materials of this type that incorporate organo-iron compounds into a polymer matrix, either through chemical bonding or by formation of blends, have the potential of being thermally processed to yield iron oxides. 

Sonoelectrochemistry has also been used for the efficient employment of porous electrodes, such as carbon nanofiber-ceramic composites electrodes in the reduction of colloidal hydrous iron oxide [59], In this kind of systems, the electrode reactions proceed with slow rate or require several collisions between reactant and electrode surface. Mass transport to and into the porous electrode is enhanced and extremely fast at only modest ultrasound intensity. This same approach was checked in the hydrogen peroxide sonoelectrosynthesis using RVC three-dimensional electrodes [58]. 

In situ Mossbauer parameters for iron oxides and oxyhydroxides dispersed on high area Schawinigan Black carbon electrode... 

One of the most ingenious ways in which corrosion is inhibited is to strap a power pack to each leg (just above the level of the sea) and apply a continuous reductive current. An electrode couple would form when a small portion of the iron oxidizes. The couple would itself set up a small voltage, itself promoting further dissolution. The reductive current coming from the power pack reduces any ferric ions back to iron metal, which significantly decreases the rate at which the rig leg corrodes. 

Reductive dissolution may be more complex than the two previous mechanisms in that it involves electron transfer processes. Formation of Fe" via reductive dissolution can be effected by adsorption of an electron donor, cathodic polarization of an electrode supporting the iron oxide and by transfer of an electron from within a ternary surface complex to a surface Fe ". Addition of Fe" to a system containing a ligand such as EDTA or oxalate promotes electron transfer via a surface complex and markedly accelerates dissolution. 

Anderman, M. Kennedy, J.H. (1988) Iron oxide (a-Fe203). In Finklea, H.O. (ed.) Semiconductor electrodes. Elsevier, Amsterdam, 146-201... 

Bockris JOM, Itoh K (1984) Stacked thin film electrode from iron oxide. J Appl Phys 56 874-876... 

Electrochemical detection of carbohydrates at nickel-copper and nickel-chromium-iron alloy electrodes has been reported for sorbitol, and has been used as a detector for HPLC analysis [36]. Oxidation of various carbohydrates at the electrodes was used for detection, and baseline separation was achieved for mixtures of sorbitol, rhamnose, glucose, arabinose, and lactose. 

---