Frenkel-defected monolayer MoS2 catalysts for efficient hydrogen evolution

Jie Xu, Gonglei Shao, Xuan Tang, Fang Lv, Haiyan Xiang, Changfei Jing, Song Liu*, Sheng Dai*, Yanguang Li*, Jun Luo*, Zhen Zhou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

195 Citations (Scopus)

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 MoS2 catalyst, in which a fraction of Mo atoms in MoS2 spontaneously leave their places in the lattice, creating vacancies and becoming interstitials by lodging in nearby locations. Unique charge distributions are introduced in the MoS2 surface planes, and those interstitial Mo atoms are more conducive to H adsorption, thus greatly promoting the HER activity of monolayer MoS2 base planes. At the current density of 10 mA cm−2, the optimal Frenkel-defected monolayer MoS2 exhibits a lower overpotential (164 mV) than either pristine monolayer MoS2 surface plane (358 mV) or Pt-single-atom doped MoS2 (211 mV). This work provides insights into the structure-property relationship of point-defected MoS2 and highlights the advantages of Frenkel defects in tuning the catalytic performance of MoS2 materials.

Original languageEnglish
Article number2193
JournalNature Communications
Volume13
Issue number1
DOIs
Publication statusPublished - Dec 2022
Externally publishedYes

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