Sub-3 nm pores in two-dimensional nanomesh promoting the generation of electroactive phase for robust water oxidation

Well-distributed sub-3 nm pores are introduced to 2D NiFe LDH ultrathin nanomesh via a controlled etching-aging process. The nanopores can effectively boost the generation of catalytically active high-valence Ni species during the redox process and therefore lead to robust water oxidation performance, making this earth-abundant catalyst promising for commercial water splitting.257