How can tritium gas be converted to copper. What reagent must be added?

Tritium is an isotope of hydrogen. It has 1 proton and 2
neutrons which gives it an atomic mass of 3, whereas the most common isotope of hydrogen
called protium has just 1 proton and the atomic mass of
1.

It is not possible to convert tritium to copper. Copper
is not a chemical compound that contains hydrogen. It is only possible to convert
tritium to a compound that has hydrogen as one of its constituents. For example if
tritium were combusted, it would combine with oxygen to form
tritiated water.

2 T2 + O2 -->
2 T2O

As far as NT3 is concerned, it can be produced by the
Haber-Bosch process using magnetite as a catalyst by reacting tritium and
nitrogen.

3 T2 + N2 --> 2
NT3