As a sibling comment says, in the paper the catalyst is acid and I can't find the release using heat in the paper. Is that an hallucination in the press article?

(Note: At high enough temperature the thermal energy will be high enough to go over the energy wall from the high energy isometric to the normal one. So it's plausible. But with high enough temperatures a lot of nasty things can happen, like total decomposition or just burning. So it may not be a good strategy to make a rechargable baterry.)