Patterning edge-like defects and tuning defective areas on the basal plane of ultra-large MoS₂ monolayers toward the hydrogen evolution reaction

Abstract

Supported and free-standing MoS 2 monolayers were patterned using a focused ion beam to tune their electrocatalytic activity toward H 2 production. Defects can either be confined near the etched interfaces or spread depending on the applied dose.