Li Laiquan, Li Changfa, Du Jiale, Huang Qianwei, Duan Jingjing, Liu Jiawei, Chen Sheng
Institute of Energy Materials Science, University of Shanghai, for Science and Technology, Shanghai, 200093, China.
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
ChemSusChem. 2025 Mar 3;18(5):e202401871. doi: 10.1002/cssc.202401871. Epub 2024 Nov 12.
Developing stable and active electrocatalysts is crucial for enhancing the oxygen evolution reaction (OER) efficiency, which sluggish kinetics hinder sustainable hydrogen production. High entropy selenides (HESes) feature with random distribution of multiple metals cations and unique electronic and size effect of Se anion, allowing for precious regulation of their catalytic properties towards high OER activity. In this work, we report a series of high-entropy selenides catalysts with tunable lattice strain for electrocatalytic oxygen evolution. Electrochemical measurements show that the quinary (NiCoMnMoFe)Se requires only 291 mV to reach 10 mA cm and exhibits a superior stability with negligible current decay during 100 h's continuous operation. By combining experimental measurements and theoretical calculation, the study reveals that the lattice distortion, reflected by the local microstrain near the active site, plays a vital role in boosting the OER activity of HESes.
开发稳定且活性高的电催化剂对于提高析氧反应（OER）效率至关重要，其缓慢的动力学阻碍了可持续制氢。高熵硒化物（HESes）具有多种金属阳离子的随机分布以及硒阴离子独特的电子和尺寸效应，从而能够对其催化性能进行精细调控以实现高析氧活性。在这项工作中，我们报道了一系列具有可调晶格应变的高熵硒化物催化剂用于电催化析氧。电化学测量表明，五元（NiCoMnMoFe）Se达到10 mA cm只需291 mV，并且在100小时连续运行期间表现出优异的稳定性，电流衰减可忽略不计。通过结合实验测量和理论计算，该研究表明，由活性位点附近的局部微应变反映出的晶格畸变在提高HESes的析氧活性方面起着至关重要的作用。
