The present invention relates to a superconductor comprising a ferroelectric with a very high dielectric constant at temperatures from below to above room temperature, in which a spontaneous dynamic alignment of the dipoles of the ferroelectric the superconductivity is induced at the surface.

The use of the innovative superconductor and application of the phenomenon with subsequent harvesting of the generated current, the ferroelectric, can be applied between two identical conductors or semiconductors, two dissimilar conductors or semiconductors, or as an insulator core of a conductor or just in contact with air.

The present invention is thus useful in applications that enable the transmission of electrical power with no losses in the fields of energy, harvest, storage, sensors, transistors, parts of a computer, photovoltaic cell or panels, wind turbines, SQUID, MRI, mass spectrometer, particle accelerators, smart grids, electric power transmission, transformers, power storage devices and/or electric motors.

The present invention refers to a method for the preparation of a shell type catalyst for mercury oxidation, the catalyst and the use of the catalyst. The catalyst is prepared by a method comprising mixing titanium dioxide, a compound of a promoter selected from molybdenum and tungsten, and a binder, to prepare a paste; shaping the paste, to obtain a shaped paste; drying and optionally calcining the shaped paste, to obtain a support material; impregnating the support material with an aqueous alkaline impregnation solution comprising a vanadium compound; drying and calcining the impregnated support material, to obtain the catalyst. The catalyst is useful for purifying exhaust gases from coal plants and other power plants where mercury emissions occurs.