Laboratory of Chemical & Electrochemical Processes

Department of Chemical Engineering – University of Patras

Welcome to the site of the Laboratory of Chemical & Electrochemical Processes

The Laboratory of Chemical and Electrochemical Processes (LCEP), directed by Professor C.G. Vayenas, belongs to the Department of Chemical Engineering at the University of Patras. The group of Patras is credited with the discovery of the effect of Electrochemical Promotion of Catalysis (EPOC) and has pioneered in the use of solid electrolytes, as an active reservoir of ionic species available to control and enhance the catalytic properties of metal and metal oxide electrodes.

The group has an extended experience in catalytic and electrocatalytic processes, which is shown by almost 10 scientific publications per year in high citation impact journals (Journal of Catalysis, Journal of Electrochemical Society, Journal of Applied Catalysis). The group has more than one hundred publications both on the phenomenology and on the fundamentals of EPOC. Research is also carrying out on the use of fuel cells with alternative fuels for simultaneously generation of electrical power and useful chemicals (‘’chemical cogeneration’’). The group of LCEP has also pioneered recently the use of triode fuel cells where a third auxiliary electrode is used to enhance the anodic or cathodic electrocatalysis. Among latest achievements is the development of the monolithic electropromoted reactor (MEPR) which significantly facilitates the practical utilization of electrochemical promotion of catalysis.

Current research of LCEP:

  1.     Electrochemical Promotion of CO2 hydrogenation to high value chemicals and fuels.
  2.     Triode operation of low and high temperature fuel cells.
  3.     Water electrolysis on novel electrocatalysts
  4.     Preparation and characterization of DSA type anodes for alcohol electrooxidation


Latest news

20 October

Catalysis and autocatalysis of chemical synthesis and of hadronization

We compare the thermodynamics and catalysis of two important exothermic chemical reactions, the homogeneously catalyzed chain reaction of H2 oxidation and the heterogeneously catalyzed ammonia synthesis, with those of an important exothermic physical reaction, namely the proton or neutron synthesis from elementary particles, i.e. quarks or relativistic neutrinos, a process known as hadronization. We show that, surprisingly, hadronization has several similarities both with homogeneous autocatalytic chain reactions, as well as with heterogeneously catalyzed ammonia synthesis. In NH3 synthesis, the presence of electrical charge, namely alkali promoters or protons or electrons on transition metals, enhances the formation of catalytically active intermediate NH species, while in hadronization, free electrons or positrons lower the activation energy and facilitate the formation of catalytically active bosonic e±-neutrino intermediates. These entities liberate highly active neutrinos creating, via their relativistic mass increase, a strong local gravitational field with all the mass-producing properties of the Higgs field. The main analogies and differences between the electric field effects in chemical catalysis and the electric and gravitational field effects in hadronization catalysis are identified and briefly discussed.

20 October

Recent Publications in Physics

In a recent work we have shown that the mass of W± bosons can be computed from first principles by modeling these bosons as relativistic rotational bound states consisting of e±–νe pairs, and by employing the de Broglie wavelength equation together with Newton’s universal gravitational law but with gravitational instead of rest masses (Vayenas et al., 2016). Here, we present similar calculations for the Zo boson which we model as a bound state of e+–νe–e with an electron antineutrino at the center of the rotating ring. This appears consistent with the fact that Zo bosons are known to decay primarily to e+–e pairs. The above models contain no adjustable parameters. The computed Zo boson mass (91.72 GeV/c2), as well as the ratio of the masses of Zo and W± bosons, differ by less than 0.6% and 0.9% respectively from the experimental values.
 

Open Positions

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  • Παρασκευή και μελέτη τρισδιάστατων ηλεκτροδίων για την οξειδωση αλκοολών σε κυψελίδες καυσίμου
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