Atomically Dispersed Co to an End-Adsorbing Molecule for Excellent Biomimetically and Prime Sensitively Detecting O₂^•– Released from Living Cells

Single-atom catalysis efficiently exposes the catalytic sites to reactant molecules while rendering opportunity to investigate the catalysis mechanisms at atomic levels for scientific insights. Here, for the first time, atomically dispersed Co atoms are synthesized as biomimetic “enzymes” to monitor superoxide anions (O2•–), delivering ultraordinary high sensitivity (710.03 μA·μM–1·cm–2), low detection limit (1.5 nM), and rapid response time...