Single-Atom Cr–N 4 Sites with High Oxophilicity Interfaced with Pt Atomic Clusters for Practical Alkaline Hydrogen Evolution Catalysis

Although dispersing Pt atomic clusters (ACs) on a conducting support is a promising way to minimize the Pt amount required in hydrogen evolution reaction (HER), the catalytic mass activity and durability of Pt ACs are often unsatisfactory for alkaline HER due to their unfavorable water dissociation and challenges in stabilizing them against agglomeration and detachment. Herein, we report a class of single-atom Cr–N4 sites with high oxophilicity interfaced with Pt ACs on mesoporous carbon for achieving a highly active and stable alkaline HER in an anion-exchange-membrane water electrolyzer (AEMWE). The as-made catalyst achieves the highest reported Pt mass activity (37.6 times higher than commercial Pt/C) and…

• T
  Tencent
• NN
  National Natural Science Foundation of China

  Awards: 22102077, 52002005, 52025133
• CN
  China National Petroleum Corporation

  Award: 2021DQ02-1002
• PU
  Peking University
• SK
  State Key Laboratory of Solidification Processing

  Award: SKLSP202004
• NK
  National Key Research and Development Program of China

  Award: 2021YFA1501101
• DO
  Division of Materials Research

  Award: DMR-1828019