Published: Jan. 1, 2023

ABSTRACT Fabrication of hierarchical porous structure two-dimensional layered double hydroxides (LDHs) materials still faces high challenges, especially the precise modulations lamellar metals and interlayer anions. Herein, in order to overcome slow kinetics water oxidation reaction which requires efficient electrocatalysts for oxygen evolution (OER), a nanocomposite assembled by foam nickel (NF) supported borate anions incorporated bimetallic NiCo hydrotalcite (NiCo-BLDH) on surface phosphide sheets (NF/Ni2P@NiCo-BLDH) is prepared as an electrocatalyst through NF in-situ phosphating electrodeposition approach. Experimental investigations indicate that introducing multi-phase into transition metal LDHs can regulate their properties, enhance adsorption efficiency OH-, thereby enhancing OER activity. Remarkably, NF/Ni2P@NiCo-BLDH electrode shows low overpotential 293 mV at 100 mA cm−2 Tafel slope 108.3 dec−1 1.0 M KOH medium, smaller than most previously reported NiCo-based catalysts. However, NF/Ni2P exhibits more hydrogen medium compared electrode. This work may push forward catalytic activity NiCo-LDH-based provide new idea large-scale electrocatalytic splitting.

Language: Английский