People are finally waking up to Rossi's contribution, which was to work with monatomic hydrogen on the Nickel lattice. Originally, he used a "catalyst" (hence, his Energy Catalyzer --> ECat) but now his device splits H2 using Electrical effects.
from the article... Sergio Focardi said that “said that mono-atomic hydrogen was critical to LENR”, .... the ability to load the metal lattice with monatomic hydrogen is speculated by some to be an important piece for making LENR happen.

