I have often noted that Pd thin film catalytic converters resemble cold fusion cells. Actually, for all anyone knows, they might *be* cold fusion cells. I have often suggested the someone should buy a brand new one, fill it with high pressure pure deuterium gas, and then heat it up. It might produce anomalous heat. I do not know what the honeycomb substrate in those gadgets is made of. If it has Ni in it, I'll bet it would produce heat.
If this works, it would resemble the way Fralick got heat from a conventional hydrogen purifier: https://www.lenr-canr.org/acrobat/FralickGCresultsofa.pdf They cost around $1,200, in case you are in the market for one: https://repairpal.com/estimator/catalytic-converter-replacement-cost
