Duplex Interpenetrating-Phase FeNiZn and FeNi₃ Heterostructure with Low-Gibbs Free Energy Interface Coupling for Highly Efficient Overall Water Splitting.

ABSTRACT: The sluggish kinetics of both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) generate the large overpotential in water electrolysis and thus high-cost hydrogen production. Here, multidimensional nanoporous interpenetrating-phase FeNiZn alloy and FeNi₃ intermetallic heterostructure is in situ constructed on NiFe foam (FeNiZn/FeNi₃@NiFe) by dealloying protocol. Coupling with the eminent synergism among specific constituents and the highly efficient mass transport from integrated porous backbone, FeNiZn/FeNi₃@NiFe depicts exceptional bifunctional activities for water splitting with extremely low overpotentials toward OER and HER (η₁₀₀₀ = 367/245 mV) as well as the robust durability during the 400 h testing in alkaline solution

SUBMITTER: Zhou Q 

PROVIDER: S-EPMC10086094 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature