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Polymer Scaffold Fixes Single Metal Atoms at Defined Sites

On-surface synthesis produced one-dimensional chains with open coordination sites that theory shows bind CO, O2, H2 more strongly.

Overview

  • An international team from OIST, CNR-ISM, Empa and the University of Rome Tor Vergata reported the platform in Nature Communications.
  • The one-dimensional polymers feature periodic side extensions that create uniform, tunable coordination sites for selectively anchoring single atoms.
  • Atomic-resolution scanning probe microscopy confirmed atom-by-atom placement and stability of isolated metal atoms above room temperature.
  • Theoretical analysis found markedly stronger binding of gases such as CO, O2 and H2 compared with common structures, indicating potential for selective pathways including CO2 conversion.
  • The researchers describe the design as adaptable to various metals and ligands, with catalytic performance tests and scalability studies identified as next steps.