Honda to start producing new hydrogen fuel cell system co-developed with GM
reuters.com
reuters.com
But for passenger cars this seems to be a lost cause. The tanks are huge, so in practice range of hydrogen cars isn't any better than BEV's.
The biggest pain of BEVs is lack of reliable public chargers everywhere. But there are far fewer hydrogen stations, and they aren't any easier to build and maintain! And you can't make high pressure hydrogen from a home outlet, so there isn't even a backup.
Compressed Hydrogen at 10,000psi w/ a 1” thick walled wound carbon fiber tank to get even less mileage? With all the metal components going brittle over time?
Good luck with that.
Edit Note: Hydrogen is about 3x the pressure of CNG