Comment by philipkglass

The reaction N2 + 3 H2 => 2 NH3 is thermodynamically spontaneously but kinetically forbidden by the strength of the N-N bond. That's why the key breakthrough of the Haber-Bosch process is the use of a doped iron oxide (magnetite -- is that what you meant?) catalyst that allows the reaction to proceed at an industrially useful rate. This wind powered ammonia plant gets the hydrogen from water electrolysis instead of steam-reformed methane; the plant is otherwise using a conventional Haber-Bosch process.

Using electrolytic hydrogen to make ammonia was fairly common in the first half of the 20th century, because a lot of remote hydroelectric plants didn't immediately have uses for all of the electricity they could generate. They turned low cost electricity into pure hydrogen and used it to make ammonia and derivatives, which were easier-to-transport high value products.