The standard Gibbs energy of formation of LaMnO3 has been measured in the temperature range from 900 to 1400 K using a solid-state cell incorporating a buffer electrode. The oxygen potential corresponding to the three-phase mixture MnO 1 La2O3 1 LaMnO3 has been measured using pure oxygen gas at 0.1 MPa as the reference electrode, and yttria-stabilized zirconia as the solid electrolyte. The buff...

Hydroquinone was found to suppress bubble formation at the outlet electrode of a sheathless capillary electrophoresis/electrospray ionization-mass spectrometer by replacing the oxidation of water (2H2O(1)<-->O2(g) + 4H+ + 4e) with that of more easily oxidized hydroquinone (hydroquinone<-->p-benzoquinone + 2H+ + 2e). Formation of p-benzoquinone replaces the formation of oxygen gas, effectively s...

Ablation of atrioventricular conduction is now widely accepted in the management of supraventricular arrhythmias. Reports of high temperatures, high pressures, and gas production suggest that there may be adverse effects on the blood, the electrode, and the cardiovascular system. In this investigation, using samples of fresh, heparinized pig blood, we measured hemolytic damage, the liberated ga...

An accurate formula exists for describing the decay of the current following the imposition of extreme concentration polarization on a disk electrode under diffusion-controlled conditions. It has been amply validated by diverse simulations and is presented here in a more compact form than hitherto. The formula finds application beyond the realm of potential-step chronoamperometry.

A model is presented of a polymer electrolyte fuel cell including slow transient effects of liquid water accumulation and evaporation in gas diffusion electrodes GDEs and gas channels. The model is reduced dimensionally, coupling a one-dimensional 1D model of gas and coolant channel flow to 1D models of transport through the membrane electrode assembly MEA and bipolar plates. An asymptotic redu...

Fuel cell catalyst layers contain an essential active catalyst, a support material for electron conductivity, ionomer proton and porosity gas transport, which build up complex interfaces that determine the overall performance. Subtle variations in processing of can significantly alter performance, demands intensive research efforts, requires considerable amount time. In last few years, diffusio...

This work reports the electroreduction of a volatile organic halide (trichloromethane) from an airborn stream. In past years, we highlighted role polycrystalline silver as powerful electrocatalyst for electroreductive hydrodehalogenation halides (VOH) in water/organic solvent mixtures, 0 to 100 % aqueous component. The successful conversion trichloromethane and 1,1,1-trichloethane relevant deha...

Diffusion of organic vapours to the surface of aerosol or cloud particles is an important step for the formation and transformation of atmospheric particles. So far, however, a database of gas phase diffusion coefficients for organic compounds of atmospheric interest has not been available. In this work we have compiled and evaluated gas phase diffusivities (pressure-independent diffusion coeff...