Here’s the original article.
Synopsis: scientists have developed an aluminum-gallium alloy that, when added to water, splits it into hydrogen and oxygen. Right now, they’re working on a way to make the alloy in powder form, which will be easily portable and thus eliminate the need to store or transport hydrogen in large quantities.
The hydrogen can be used to fuel your basic internal combustion engine. According to the article, the only change necessary would be replacing the gas fuel injector with a hydrogen one. (Disclaimer: I know nothing about cars; this may be tantamount to replacing the engine for all I know.)
Once produced in sufficient quantities, the cost of fueling with this method would be comparable to gasoline, with far fewer environmental concerns and (presumably) more stability:
Furthermore, the residue left after use can be recycled back into the necessary alloy, thus providing a far more sustainable fuel source.
So… what’s the catch? There’s gotta be something I’m missing here, but I’m not a chemist or engineer. Any potential big problems, and even then is this still a better option than what we’ve got?