A gas sensor based on hollow NiFe 2 O 4 microspindles delivers unprecedentedly high sensitivity towards acetone vapor as well as good selectivity and cycling stability at a low working temperature.
An amorphous NiCoFeCrMo-based high-entropy hydroxide possesses the maximum content of high-valence Ni3+ species, boosting the oxygen evolution electrocatalytic performance.
This review gives a global map of HEMs on the basis of metal entities from noble metals to cheap transition metals and provide meaningful guidance to researchers for the exploration of advanced HEMs for water splitting.