Pinpointing the axial ligand effect on platinum single-atom-catalyst towards efficient alkaline hydrogen evolution reaction

Abstract Developing active single-atom-catalyst (SAC) for alkaline hydrogen evolution reaction (HER) is a promising solution to lower the green hydrogen cost. However, the correlations are not clear between the chemical environments around the active-sites and their desired catalytic activity. Here we study a group of SACs prepared by anchoring platinum atoms on NiFe-layered-double-hydroxide. While maintaining the homogeneity of the Pt-SACs, various axial ligands (−F, −Cl, −Br, −I, −OH) are employed via a facile irradiation-impregnation procedure, enabling us to discover definite chemical-environments/performance correlations. Owing to its high first-electron-affinity, chloride chelated Pt-SAC exhibits…

• SS
  Salt Science Research Foundation

  Award: BL14W1
• AF
  Agency for Science, Technology and Research

  Award: U2102d2002
• NU
  National University of Singapore

  Awards: A-0009176-03-00, A-0009176-02-00
• NR
  National Research Foundation Singapore

  Award: NRF-NRFF13-2021-0007
• NN
  National Natural Science Foundation of China

  Award: BL1W1B
• BU
  Beijing University of Chemical Technology
• NK
  National Key Research and Development Program of China

  Award: 2018YFA0702002
• FR
  Fundamental Research Funds for the Central Universities

  Awards: BL14W1, 2018YFA0702002
• BS
  Beijing Synchrotron Radiation Facility

  Award: BL14W1