Vita Publikationen

The electrochemical removal of bromate on a tin cathode has been studied by both electrochemical techniques, such as cyclic voltammetry and chronoamperometry, as well as by steady-state electrolytic experiments. The reduction of bromate in 2M NaCl takes place efficiently at potentials more negative than -1.4V vs. [...]

A simple, sensitive and reliable method for the rapid determination of hyponitrite and hyponitrate (Angeli's salt) in alkaline media, is presented where both species are relatively stable. The method is based on the separation of the two anions by an anion exchange column and thereafter UV spectrophotometric detection at 248 nm. [...]

The effect of the nature of six metal electrodes (Sn, Bi, Pb, Al, Zn, In) on the rate and the distribution of the products of the electrochemical reduction of nitrate was studied. The product distribution depends on the nature of the metal only quantitatively, while the rate of the reduction was found to be about the same on all metals when the electrolysis was performed at the same rational potential (Er), which is the difference between the applied potential and the potential of zero charge of each metal. [...]

The reaction pathways that lead to the formation of intermediates and final products of the reduction of nitrate on tin at high overpotential were studied in this paper. Possible chemical or electrochemical reactions of the intermediates were investigated and discussed. [...]

The electrochemical reduction of nitrate on tin and bismuth was studied under steady-state electrolytic experiments by galvanostatic polarization of the electrodes. The experiments were carried out in a 0.8 M NaHCO(3) + 0.015 M NaNO(3) medium which represents the resulting solution from the regeneration of the nitrate selective ion exchange resins. [...]

The electrochemical reduction of nitrate and nitrite in simulated low-level nuclear wastes containing 1.8 M NaNO(3) + 0.55 M NaNO(2) + 1.16 M NaOH was studied under galvanostatic polarization on tin and bismuth cathodes. The rate of the reduction of nitrate was about the same on both metals. [...]

The influence of the concentration of nitrate in the range between 100 and 62,000 mgL(-1) NaNO3 in NaCl solutions was studied under constant potential electrolysis at -2.8V vs. Ag/AgCl. [...]

The influences of the potential, the concentration and the nature of the supporting electrolyte on the rate of the reduction of nitrate on tin were studied by both voltammetry and constant potential electrolytic experiments. Both the rate of the reduction of nitrate and the yield of nitrogen increase as the negative potential increases from - 1.8 to -2.8 V versus Ag/AgCl, while the yield of nitrite decreases. [...]

For the case of the commercially available metal-organic framework (MOF) structure Basolite (TM) F300 or Fe (BTC) with BTC = benzene-1,3,5-tricarboxylate, it is shown that the Fe(III/II) electrochemistry is dominated by reductive dissolution rather than ion insertion (which in marked contrast is dominating the behaviour of Fe(III/I) open framework processes in Prussian blues). Solid Fe(BTC) immobilised onto graphite or platinum working electrodes is investigated and it is shown that well-defined and reversible Fe(III/II) reduction responses occur only on platinum and in the presence of aqueous acid. [...]