The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202301579. Figure 6. The calculated Gibbs free energy for hydrogen evolution reduction of different N-sites marked in red dash cycles in the heterostructure of triazine/heptazine.

Two-dimensional (2D) boron nanomaterials have received considerable attention due to their distinct physicochemical properties in contrast to bulk boron. However, the susceptibility to oxidation in air has limited their practical...