Wu Han, Zhang Jinfeng, Lu Qi, Li Yajing, Jiang Rui, Liu Yuan, Zheng Xuerong, Zhao Naiqin, Li Jiajun, Deng Yida, Hu Wenbin
School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Key Laboratory of Advanced Ceramics and Machining Technology, (Ministry of Education), Tianjin University, Tianjin 300350, P. R. China.
State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, P. R. China.
ACS Appl Mater Interfaces. 2023 Aug 16;15(32):38423-38432. doi: 10.1021/acsami.3c05781. Epub 2023 Aug 1.
The main obstacle to the development of large-scale electrochemical hydrogen production based on water splitting is the slow four-electron kinetics of OER (oxygen evolution reaction). The most efficient method is to create sophisticated and effective OER catalysts. Here, we proposed the controlled synthesis of high-entropy layered double hydroxides (HELDH) for wide component regulation and the component design of high OER activity to make up for the restricted component regulation in conventional catalysts. Through the use of coprecipitation and hydrothermal synthesis, the representative sample (MgCoNi)(FeAl)-LDH is created and systematically characterized. Significantly, this technique of preparation may generically synthesize a variety of HELDH with various component combinations, demonstrating the remarkable adaptability of the HELDH components. Subsequently, (FeCoNi)(FeCr)-LDH with high OER activity is designed and synthesized. (FeCoNi)(FeCr)-LDH shows excellent OER activity (overpotential is only 230 mV at 10 mA cm). A new platform for the creation of high-performance catalysts and high-entropy materials was established by the synthesis and design of HELDH.
基于水分解的大规模电化学制氢发展的主要障碍是析氧反应（OER）缓慢的四电子动力学。最有效的方法是制备复杂且有效的OER催化剂。在此，我们提出了高熵层状双氢氧化物（HELDH）的可控合成方法，用于广泛的组分调控以及具有高OER活性的组分设计，以弥补传统催化剂中受限的组分调控。通过共沉淀和水热合成法，制备了代表性样品（MgCoNi）（FeAl）-LDH并进行了系统表征。值得注意的是，这种制备技术可以通用地合成具有各种组分组合的多种HELDH，证明了HELDH组分具有显著的适应性。随后，设计并合成了具有高OER活性的（FeCoNi）（FeCr）-LDH。（FeCoNi）（FeCr）-LDH表现出优异的OER活性（在10 mA cm时过电位仅为230 mV）。通过HELDH 的合成与设计，建立了一个用于制备高性能催化剂和高熵材料的新平台。
