Edge-Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe₂ O₄ for Photoelectrochemical Water Oxidation.

ABSTRACT: The structural properties of octahedral sites (B_Oh ) in spinel oxides (AB₂ O₄ ) play vital roles in the electrochemical performance of oxygen-related reactions. However, the precise manipulation of AB₂ O₄ remains challenging due to the complexity of their crystal structure. Here, a simple and versatile molten-salt-mediated strategy is reported to introduce Ni²⁺ in B_oh sites intentionally on the surface of zinc ferrite (ZnFe₂ O₄ , ZFO) to promote the active sites for photoelectrochemical (PEC) water splitting. The as-created photoanode (ZFO-MSNi) shows a remarkable cathodic shift of ≈ 450 mV (turn-on voltage of ≈ 0.6 V_RHE ) as well as three times the 1-sun photocurrent density at 1.

SUBMITTER: Jiang Z 

PROVIDER: S-EPMC10401156 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature