Researchers find calcium outshines chromium in the catalytic production of ammonia. Working together, a humble trio of calcium atoms have defied expectations to break apart one of the strongest chemical bonds known. The atoms form the key part of a catalyst that can cleave the triply bonded nitrogen molecule (N2), an essential step in synthetic ammonia-based fertilizer manufacture. The discovery could inspire new and greener ways to make fertilizer and other essential chemicals. Read More