Hi guys! I always followed this forum with great interest, but I never posted before, though. However, this topic sparked in my mind some ideas that I would like to share with you.
A first thought is that the unknown radiation emitted by metals while adsorbing hydrogen was indeed observed and described by a number of researchers. Apart from Srinivasan, also E. Storms published an interesting paper on this topic: Storms, E. and B. Scanlan, Nature of Energetic Radiation Emitted from a Metal Exposed to H2. J. Condensed Matter Nucl. Sci., 2013. 11: p. 142-156.
Secondarily, I would suggest a very simple way to detect and potentially exploit this radiation. This method does not involve at all bi-metallic configurations and is completely immune to elettro-chemical effects. If a semiconductive p-n junction is introduced into the cell, the impinging radiation will generate electrons and holes in the p-n junction, and this will produce a measurable potential and current (the current will be proportional to the radiation flux). This is indeed the same principle of betavoiltaic batteries. The p-n junction can be a small solar cell or even a photodiode. If a voltage and/or current can be obtained this way, the presence of the radiation will be confirmed in the cell, behond any doubt realted to hypotetical electrochemical effects. Pheraps even an usefull level of power may be obtained (probably by using a planar configuration, with surface larger area, not a coaxial one).