103 cal/gram molecule to dissociate hydrogen yeilds 90.000 cal/Gram Recombined

[LibreEnergia]

I'm intrigued by this.

In somewhat simplified terms it seems to me if you created a 'hole' in the universe then 'stuff' you put in the hole would heat up. Overall the process would be conservative. Thermal energy would manifest at the whole and the universe would contract, (if ever so slightly).

In this case the hole is a matrix of some material that creates a cavity of the required dimensions such that the Casmir force is significant. The 'stuff' is atomic hydrogen. It enters the cavity, falls to a lower energy state that causes it to absorb energy and exits. rinse, repeat.

Catalytic convertors are perhaps  of interest in this regard as we know that they contain a metal lattices with random interstitial cavities of around the right size for the effect to manifest.  (~ 100 nano-metres).

Of far more interest though would be to engineer a metal lattice directly (perhaps using techniques similar to electronics fabrication.