Year: 2022
Type: article
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 lower overpotential (164 mV) than either pristine monolayer MoS 2 surface plane (358 mV) or Pt-single-atom doped MoS 2 (211 mV). This work provides insights into the structure-property relationship of point-defected MoS 2 and highlights the advantages of Frenkel defects in tuning the catalytic performance of MoS 2 materials.
Source: Nature Communications
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,890
Funders: National Natural Science Foundation of China, Government of Jiangsu Province, East China University of Science and Technology, Hunan University, Natural Science Foundation of Jiangsu Province, Soochow University, Shanghai Rising-Star Program, Higher Education Discipline Innovation Project, Fundamental Research Funds for the Central Universities, Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Science Fund for Distinguished Young Scholars of Tianjin
OpenAlex ID: W4224224331