Fe Incorporation in Ni-Based Layered Hydroxides: Implications for Oxygen Evolution Electrocatalysis.

ABSTRACT: Alkaline water electrolysis (AWE) is a promising hydrogen production method but faces challenges with the sluggish oxygen evolution reaction (OER), which requires high voltages. Nickel-based layered hydroxides (LHs) are effective earth-abundant OER catalysts, though Fe incorporation from electrolyte impurities significantly enhances their performance. This study systematically examines Fe impurity incorporation in Ni-based LH phases: α-Ni-LH, β-Ni-LH, and NiAl- and NiFe-layered double hydroxides (LDHs). Two incorporation methods were explored: a standard electrolyte purification process and an electrochemical activation approach. Electrochemical activation is more effective, and expanded phases have more affinity to allocate Fe. Incorporation experiments suggest a partial transformation of

SUBMITTER: Jaramillo-Hernandez C 

PROVIDER: S-EPMC12690575 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature