The key to success in getting an active LENR reaction is fuel preparation. There have been a number of sucessful fuel preparation methods developed over the years. The first is heavily loaded palladium with deuterium. Try vapor deposition of palladium on a base of palladium micro powder in a deuterium atmosphere.
Try LION's method. It has been posted about here somewhere on this site. diapads is a keyword that you can scan on to find those posts. The goal is to get deuterium to enter the diamond lattice so that the deuterium is compressed by that lattice. Try 250 micron diamonds as an alternative to diapads.
try the ECCO reactor method where various elements and chemicals are treated using sonic horns fo weeks. See MFMP for details on this fuel prep method.