Nickel ferrite supported on calcium-stabilized zirconia for solar hydrogen production by two-step thermochemical water splitting

Abstract

Solar hydrogen production by thermochemical cycles from water using oxide redox pairs represents a promising technology at medium-long term to storage intermittent solar irradiation. Redox oxides based on nickel ferrite supported on modified zirconia have been prepared and studied for renewable H2 production from water by two-step thermochemical cycles. We report herewith a new material based on nickel ferrite supported on Ca-doped zirconia substrate that presents high efficiency for hydrogen production, which is ascribed to a high active phase dispersion promoted by the inclusion of part of Fe cations in the support lattice and by the formation of calcium zirconate, acting as a physical barrier that hinders sintering.

A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

“…Ni x Fe 3−x O 4 /m-ZrO 2 have also high reactivity when the value x reached x = 1.0 [214]. Reñones et al [222] studied the ferrite conversion and hydrogen production of nickel ferrite supported on calcium-stabilized zirconia and reported an enhanced hydrogen generation efficiency due to the promoted high active phase dispersion caused by the formation of calcium zirconate, which acted as a physical barrier and hindered sintering. Fernández-Saavedra et al [223] examined the hydrogen production and kinetic parameters of commercial nickel ferrites.…”