Near-100% site utilization of single atoms for efficient electrocatalysis

Despite that enhancing site utilization (Usite) of single atoms (SAs) is crucial in electrocatalysis beyond increasing intrinsic activity and site density, numerous SAs are inaccessible during reaction due to the dense micropores and disordered stacking of carbon particles. Here, the enhancement for Usite of SAs is achieved through a surfactant-assis'ted freeze-casting (SAFC) strategy. The sodium dodecyl sulfate (SDS)-modified Fe-doped zeolitic imidazolate framework-8 (Fe/ZIF-8) particles assemble into single-layer two-dimensional (2D) superstructures along the ice-crystal. During pyrolysis, the dual-stress effect derived from SDS shell and tight alignment of particles induces Fe/ZIF-8 to transform into…

• NN
  National Natural Science Foundation of China
• CC
  Central China Normal University
• NS
  National Synchrotron Radiation Research Center
• ER
  Exploratory Research for Advanced Technology

  Award: JPMJER2003