Gao Ying, Tian Xicai, Niu Qiang, Zhang Pengfei
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
National Enterprise Technology Center, Inner Mongolia Erdos Electric Power and Metallurgy Group Co., Ltd., Ordos, Inner Mongolia, 016064, China.
ChemSusChem. 2025 Jan 14;18(2):e202401517. doi: 10.1002/cssc.202401517. Epub 2024 Oct 23.
High-entropy oxides (HEOs) have been receiving a lot of attention due to their excellent properties. However, current common methods for preparing HEOs usually involve high-temperature processes. The development of green synthesis techniques remains an important issue. Carbon-supported HEOs have shown excellent performance in electrochemical energy storage in recent years. Crucially, the traditional methods cannot synthesize carbon-supported HEOs under N or air atmospheres. Toward this end, a universal method for preparing carbon-supported HEOs was proposed. During this process, without high-temperature post-treatment, high-entropy LaMnO could be synthesized in 2 hours using the mechanical ball-milling method. Furthermore, this method was universal and has been proved in the synthesis of a series of HEOs such as PrVO, SmVO, and MgAlO. The LaMnO species synthesized by this method exhibit excellent catalytic performance in CO combustion and could maintain a conversion rate of over 97 % for 350 hours. Subsequently, carbon-supported HEOs could be obtained with 0.5 hours of additional ball-milling, offering significant advantages over traditional methods. This process provides a potential method to synthesize carbon-supported HEOs.
高熵氧化物（HEOs）因其优异的性能而备受关注。然而，目前制备高熵氧化物的常用方法通常涉及高温过程。绿色合成技术的发展仍然是一个重要问题。近年来，碳负载的高熵氧化物在电化学储能方面表现出优异的性能。关键的是，传统方法无法在氮气或空气气氛下合成碳负载的高熵氧化物。为此，提出了一种制备碳负载高熵氧化物的通用方法。在此过程中，无需高温后处理，使用机械球磨法可在2小时内合成高熵LaMnO。此外，该方法具有通用性，并已在一系列高熵氧化物如PrVO、SmVO和MgAlO的合成中得到验证。通过该方法合成的LaMnO物种在CO燃烧中表现出优异的催化性能，并且在350小时内转化率可保持在97%以上。随后，通过额外0.5小时的球磨可获得碳负载的高熵氧化物，与传统方法相比具有显著优势。该过程为合成碳负载的高熵氧化物提供了一种潜在方法。
