Vicente García-García

Early stages of lead dioxide electrodeposition on rough titanium

The electrodeposition of lead dioxide onto rough titanium surfaces has been studied using both voltammetric and chronoamperometric techniques. The behaviour of the system is a function of the upper potential limit and also of the surface topography, and can be explained bearing in mind the competence between the (inactivation) of the support and the electrodeposition process. The influence of an ultrasonic field in the process has also been analyzed.

Use of a Gas-Diffusion Electrode as Anode in the Electrochemical Synthesis of L-Cysteine

To decrease the energetic cost of reduction process in electro-organic synthesis, a hydrogen gas-diffusion electrode (HDE) can be used as anode. Thus, the results of an investigation of the electrochemical synthesis of L-cysteine from L-cystine using a HDE are reported. The influence of both amino acids on the behavior of H 2 oxidation reaction was studied by voltammetry and by using a rotating disk electrode. Also a comparative study between the use of a HDE anode or a dimensionally stable anode in the synthesis of L-cysteine in a filter press cell was made.

Electrosynthesis of p-hydroxybenzaldehydefrom sodium p-hydroxymandelate

The electrosynthesis of p-hydroxybenzaldehyde (PHB) from sodium p-hydroxymandelate (SPHM) was investigated and good synthesis conditions were obtained. The electrochemical reactor was a divided filter-press with carbon felt electrodes (anode and cathode). Two different anolytes were used depending on the membrane employed. Thus, a 0.6m SPHM 2.7m NaOH solution was used in conjunction with a cationic Nafion® 117 membrane while a 0.6m SPHM in 1.8m NaOH solution was employed with an anionic Ionac® MA-3475 membrane. The electrolysis was carried out at a constant current density of 100mAcm−2. A material yield of approximately 90% was obtained at an energy cost of 1.4–1.5kWhkg−1 PHB and a production of 49kg PHBm−2 day−1.

Prospective Applications of Renewable Energy-Based Electrochemical Systems in Wastewater Treatment

Abstract This chapter deals with the possibilities of combining renewable energies such as solar photovoltaic energy (PV) with the different electrochemical processes toward wastewater treatment. The chapter first describes the nature and characteristics of a solar panel along with the connections of solar plants to a wide variety of electrochemical processes. The chapter follows with the primary progress achieved recently by the distinct combination of PV and the electrochemical processes, pointing out the principal research directions or future perspectives for each electrochemical application. A figure of merit of this chapter is devoted to the wastewater treatment that comes from the almond manufacture industry by using PV coupled with electro oxidation, electrocoagulation, and electro dialysis. Finally, some remarkable examples about the use of another renewable energy, for example, wind energy, coupled with electrochemical wastewater treatment are also taken into account in this chapter.