This 11 year old experiment below is basically a type of SunCell without the titanium catalyst, and using different electrodes. It would have been easy to surround this reactor with photoelectric cells, for increased gain, but AFAIK – Naudin never went that far.
http://bingofuel.online.fr/bingofuel/html/bfr10.htm It was claimed to have an overunity efficiency of about 125% to 150% which is less than Mills 200% - but it has no catalyst to recondition. Naudin even used a power supply from an arc welder. However, this design consumes carbon from the graphite electrodes – as does the Santilli reaction, but less carbon is consumed than the gain – at least according to the claim. Mills’ reaction also consumes the catalyst, at a lesser rate than the gain, at least according to the claim. Carbon is not a Mills catalyst, unless RM has now added it to the long list. It would be interesting to see the Naudin’s reactor using titanium in some form – perhaps in the electrodes. Naudin did try to close the loop, but was not successful although he did power the genset with the gas. Who knows how much extra power could have been obtained from solar cells. http://bingofuel.online.fr/bingofuel/videos/5hpgenbfr.rm Like everything Naudin experimented with, he gave up too soon. Jones