Frenkel-defected monolayer MoS2 catalysts for efficient hydrogen evolution

Abstract Defect engineering is an effective strategy to improve the activity of two-dimensional molybdenum disulfide base planes toward electrocatalytic hydrogen evolution reaction. Here, we report a Frenkel-defected monolayer MoS 2 catalyst, in which a fraction of Mo atoms in MoS 2 spontaneously leave their places in the lattice, creating vacancies and becoming interstitials by lodging in nearby locations. Unique charge distributions are introduced in the MoS 2 surface planes, and those interstitial Mo atoms are more conducive to H adsorption, thus greatly promoting the HER activity of monolayer MoS 2 base planes. At the current density of 10 mA cm −2 , the optimal Frenkel-defected monolayer MoS 2 exhibits a…

• NN
  National Natural Science Foundation of China

  Awards: 21975067, 51971157, 19JCJQJC61800, 22175060
• GO
  Government of Jiangsu Province
• EC
  East China University of Science and Technology
• HU
  Hunan University
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20210729
• SU
  Soochow University
• SR
  Shanghai Rising-Star Program

  Award: 20QA1402400
• HE
  Higher Education Discipline Innovation Project
• FR
  Fundamental Research Funds for the Central Universities
• PF
  Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
• SF
  Science Fund for Distinguished Young Scholars of Tianjin

  Award: 19JCJQJC61800