It's a perfect example of getting caught up in the implications of the solution of a hard problem before you've got it solved. Why if we only had access to limitless cheap hydrogen we could...
There's endless neat energy things we could do with limitless cheap hydrogen once we have it. This one isn't even that interesting, just academic pipe-dreaming.
I'm all for encouraging the science (they may make a breakthrough whilst researching it) and don't wish to belittle their achievements. But the article presenting this as a feasible fuel is wrong.
It's like designing a car that runs on Fusion power... great idea, but not a reality until a fairly major technical hurdle has been overcome first, namely; harnessing Fusion Power. And even then, there are far more exciting uses for the technology.