HELP! Questions about FCEV

As hydrogen is expected to be utilized primarily in the commercial vehicle market, which is well suited for liquid hydrogen, questions have arisen.

 

1. Can only gaseous hydrogen be injected into a hydrogen fuel cell?

-Referring to PEMFCs, SOFCs, AFCs, MCFCs, PAFCs, and DMFCs.

 

2. If Q 1 is correct, has the technology to inject liquid hydrogen been invented yet?

 

3. What are the types of fuel cells that utilize liquid hydrogen?

 

4. Are there any global mega-companies or startups that are implementing the technology well?

 

All replies and information are welcome!! 🥰

Thanks