Great to see that making ammonia production more environmentally friendly is actively being worked on from different angles. There was another process announced recently that produced ammonia from supplied nitrogen (which would still be separated from air as I understood) in an electrolysis cell. These are links for this other approach:

Paper: https://www.science.org/doi/10.1126/science.abg2371

Article on the paper: https://newatlas.com/energy/green-ammonia-phosphonium-produc...

Submission here: https://news.ycombinator.com/item?id=29427914