1、论文“Breaking the scaling relationship for high-performance seawater oxidation through lattice distortion triggered by molybdenum”被Journal of Materials Science & Technology（2023年中科院SCI期刊一区TOP, IF=11.2）接收！

Abstract

Efficient and stable electrocatalysts are essential for seawater splitting to sustain electrolysis without chloride corrosion, particularly at the anode. Furthermore, the oxygen evolution reaction (OER) requires high overpotential due to the universal scaling relationship. Herein, molybdenum doping FeNi₂Se₄ with lattice distortion is proposed to break the scaling relationship. Mo-FeNi₂Se4 shows high performance in direct seawater electrolysis and achieves current densities of 10 and 100 mA cm^-2 at overpotentials of 190 and 250 mV, respectively, together with high OER selectivity and long-term stability. It is found that the lattice distortion induced by Mo doping in (3 1 0) plane of FeNi₂Se₄, leads to a decrease in the d-band center and the adsorption energy of *O, which not only breaks the scaling relationship of OER but also lowers the energy barriers of rate-determining step. Moreover, it enhances the corrosion resistance to Cl^-, and realizes the high-efficiency seawater electrolysis driven by photovoltaic.

https://doi.org/10.1016/j.jmst.2024.10.050

2、论文“Self-Adapting Oxyanion Armor Achieves Highly Stable and Efficient Seawater Electrolysis at Ampere-Level Current Densities”被Advanced Functional Materials（2023年中科院SCI期刊一区TOP, IF=18.5）接收！

Abstract

Seawater electrolysis is an effective way for large-scale green hydrogen. Nevertheless, the anode suffers from the severe corrosion of Cl^- and Br^- during oxygen evolution, which gives rise to the issues of narrow-deep pits and shallow-wide pits, respectively. Herein, an anti-corrosion strategy is presented by self-adapting oxyanion armor to prevent the high valence active sites from Cl^- and Br^- corrosion. The core–shell FeNi₂Se₄@NiFe-Phy is reconstructed to active species NiFeOOH covered by an oxyanion layer composed of phosphoric and carbonate. The aimed anode exhibits remarkable efficiency, achieving current densities of 10 and 200 mA cm^-2 at overpotentials of merely 220 and 277 mV, respectively. Notably, it shows unparalleled durability, enduring without any discernible degradation following rigorous testing for 400 h at 400–1000 mA cm^-2 in alkaline simulated seawater, as well as natural seawater. A combination of density functional theory calculations and molecular dynamics simulations further confirms the bifunctional enhancement of oxyanion armor on NiFeOOH surface. At a current density of 200 mA cm^-2, the alkaline seawater electrolyzer has significant energy efficiency, consuming merely 4.61 and 4.27 kWh Nm^-3 H₂ at room temperature and 80 °C, respectively. This work offers an efficacious surface corrosion resistance strategy for anode protection during seawater electrolysis.

https://doi.org/10.1002/adfm.202418940