Image (IMAGE) Science China Press Caption Schematic illustration of altering the rate-determining step of nitrogen reduction reaction by introducing cobalt single-cluster in the catalyst. The cyan, red, purple, and gray spheres represent C, N, Co, and H atoms, respectively. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.