One way to define active sites for a gainful Ni-H reactor would be as a "topologically decoherence-protected nanocavities (Casimir cavities or pits) filled with protons"
This is not dissimilar: Topologically Decoherence-Protected Qubits with Trapped Ions http://prl.aps.org/abstract/PRL/v99/i2/e020503 "We show that trapped ions can be used to simulate a highly symmetrical Hamiltonian with eigenstates naturally protected against local sources of decoherence. This Hamiltonian involves long-range coupling between particles and provides a more efficient protection than nearest neighbor models discussed in previous works. Our results open the perspective of experimentally realizing, in controlled atomic systems, complex entangled states with decoherence times up to 9 orders of magnitude longer than isolated quantum systems."
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