A metal-organic framework compound as a filter for deuterium and tritium https://www.mpg.de/11080218/mof-deuterium-tritium?c=19174181
A team of researchers around M. Hirscher of the Max Planck Institute for Intelligent Systems has presented a metal-organic framework compound as a filter for deuterium and tritium.
was able to filter out deuterium – but only at a temperature of minus 223 degrees Celsius