I have mentioned that one avenue of research into the LEC effect is to see if:-
In this context we have the electro-chemical series, which is of importance when we consider galvanism (also called bi-metal effect in days of your) . There is also another series- more complex and inclusive of many 'non-obvious' materials called the 'tribo-electric scale'. Non-obvious in that it relates to the readiness of materials to accept or donate electrons when in close contact and particularly when rubbed together- think balloons and cats for example. Sadly the list linked above does not include gases - but gases as we know can carry a charge. This charging, known as triboelectric charging, or tribocharging for short, is observed naturally in the large electric fields observed in dust devils and sand storms as well as in everyday circumstances, Despite the long-observed, ubiquitous nature of tribocharging, the actual physics governing tribocharging is not well understood, and multiple different mechanisms have been proposed over the past several decades.
Attached below is a very readable paper from the Royal Society archives:-
Experiments on Tribo-Electricity. I.— The Tribo-Electric Series.
By P. E. S haw, B.A., D.Sc., University College, Nottingham.
(Communicated by Prof. E. H. Barton, F.R.S. Received May 24, 1917.)
Hope is not off topic but in my unorthodox understanding All things rubbing create plasma of some sort and when friction is high there’s chemistry and plasma happening together.
The guys at the Electric Universe contend that everything is behaving as a plasma at different rates and even clouds are a sort of plasma, hence the gases rubbing against themselves would also be behaving like a plasma to some extent, and under X ray influence even more so, hence your interest in tribo electricity is very justified, and the lack of literature about may be a gap of knowledge really in need to be filled to understand LENR and the LEC. Just some thoughts of a currently misfiring mind.
I have some papers that I have gathered in my search for LENT and a few are of tribo-reactions that have found anomalous compositions of the surface metals after the experiments.