Lord Rayleigh patent 1946 (https://www.lenr-forum.com/attachment/1773-hydrogen-energy-rayleigh-pdf/): Surprising energy from gases after an electrical discharge. This patent goes well with famous Langmuir experiments (http://www.astrosa.com/n06/77_Langmuir.pdf) with atomic hydrogen (http://chavascience.com/en/hydrogen/langmuir-excess-energy-from-hydrogen) which has been used for welding (https://en.wikipedia.org/wiki/Atomic_hydrogen_welding) for quite some time (compare Moler generator (http://www.borderlands.de/net_pdf/NET0705S13-17.pdf) and its replication with Naudin (https://pesn.com/archive/2005/06/26/9600116_Naudin_MAHG/index.html), who achieved COP ~ 10 (http://jlnlabs.online.fr/mahg/tests/pultests.htm)), Joseph Papp's noble gases engine (http://www.infinite-energy.com/iemagazine/issue51/papp.html), Chernetsky's plasma generator (http://www.nuenergy.org/chernetsky-plasma-generator/) and whatever else (Energoniva (https://www.lenr-forum.com/forum/thread/4802-energoniva-a-water-plasma-transmutation-technology-from-russia/), BrilliantLight technologies, etc..) Note that these effects manifest usually with monoatomic gases or at high temperatures, where the dissociation of gases becomes dominant.
Lord Rayleigh:
The Surprising Amount of Energy (http://rspa.royalsocietypublishing.org/content/189/1018/296) Which Can Be Collected from Gases after the Electric Discharge Has Passed (PDF (http://rspa.royalsocietypublishing.org/content/royprsa/189/1018/296.full.pdf))
New Studies on Active Nitrogen (http://rspa.royalsocietypublishing.org/content/176/964/16) I. Brightness of the After-Glow under Varied Conditions of Concentration and Temperature (PDF (http://rspa.royalsocietypublishing.org/content/royprsa/176/964/1.full.pdf))
New Studies on Active Nitrogen (http://rspa.royalsocietypublishing.org/content/176/964/16). II. Incandescence of Metals in Active Nitrogen, and Quantitative Estimates of the Energy Liberated (PDF (http://rspa.royalsocietypublishing.org/content/royprsa/176/964/16.full.pdf))
Further Studies on Active Nitrogen (http://rspa.royalsocietypublishing.org/content/180/981/123). III. Experiments to Show that Traces of Oxygen or Other Impurity Affect Primarily the Walls of the Vessel, and not the Phenomena in the Gas Space (PDF (http://rspa.royalsocietypublishing.org/content/royprsa/180/981/123.full.pdf))
intresting, thanks!