Is there anything that can react with molecular gaseous nitrogen? I am looking for something to react with nitrogen in the air. Is there any substance that can react fast with molecular nitrogen at room temperature?
From Wikipedia


  Elemental lithium reacts ("burns") in an atmosphere of $\ce{N2}$ to give lithium nitride:
  $$\ce{6Li + N2 → 2 Li3N}$$
  
  Magnesium also burns in nitrogen, forming magnesium nitride.
  $$\ce{3 Mg + N2 → Mg3N2}$$