A liquid-hydrogen Čerenkov counter

Superfluid liquid hydrogen?

Recent work by Peter Toennies’ group in Göttingen has revealed convincing evidence for superfluidity in liquid hydrogen – thus adding a third liquid to the two, liquid He and liquid He, in which superfluididy is already known. Superfluids are numbered among the most peculiar and counter-intuitive of all materials. They have no viscosity at all. Thus, an object travelling in a pure superfluid mo...

Hydrogen evolution at liquid-liquid interfaces.

Blowing bubbles: Hydrogen evolution by proton reduction with [(C(5)Me(5))(2)Fe] occurs at a soft interface between water and 1,2-dichloroethane (DCE). The reaction proceeds by proton transfer assisted by [(C(5)Me(5))(2)Fe] across the water-DCE interface with subsequent proton reduction in DCE. The interface essentially acts as a proton pump, allowing hydrogen evolution by directly using the aqu...

Modelling of liquid hydrogen spills

Resistive Liquid-Vapor Surface Sensors for Liquid Nitrogen and Hydrogen

Ten resistance thermometers were tested as point sensors for detecting the liquid-vapor interface in liquid nitrogen and liquid hydrogen. Test results showed that most could be made to detect the liquid surface and lead orientation can be important. A silicon resistive sensor had the fastest response and produced the greatest signal change.

Oxygen Reduction and Hydrogen Production at the Liquid/Liquid interfaces

Molecular electrocatalysis for oxygen reduction at a polarized water/1,2-dichloroethane (DCE) interface was studied, involving aqueous protons, ferrocene (Fc) in DCE and cobalt porphyrin catalysts like cobalt porphine (CoP) cobalt 2,8,13,17-tetraethyl-3,7,12,18-tetramethyl-5-p-aminophenylporphyrin (CoAP) at the interface. The reaction is electrocatalytic as its rate depends on the applied Galva...