Ni₂P@FePOx has been synthesized via extraction and selective phosphorization of nickel in NiFe-LDH, and then conversed to a new heterostructure of Ni₂P@NiFe hydroxide (P-NiFe) during water splitting. P-NiFe can act as an efficient bifunctional electrocatalyst for overall water splitting.

Hydrogen-bonded organic frameworks (HOFs), a new type of porous material following the metal–organic frameworks (MOFs), covalent organic frameworks (COFs), etc., have emerged as one of the promising candidates in diverse potential applications. In this highlight, we summarize the key progress on HOF-based materials, in which their design, structures, as well as potential applications will be discussed.