Ultrathin MXene nanosheets with rich fluorine termination groups realizing efficient electrocatalytic hydrogen evolution

Highly efficient and stable MXenes electrocatalysts for hydrogen evolution reaction were realized by surface structural modulation at atomic scale. Taking the rich surface F-terminated Ti2CTx ultrathin nanosheet as an example, which possess good electric conductivity and high active sites density and reactivity, leading to the dramatically enhanced HER activity.279