Wu Han, Lu Qi, Li Yajing, Wang Jiajun, Li Yingbo, Jiang Rui, Zhang Jinfeng, Zheng Xuerong, Han Xiaopeng, 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.
Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University, Binhai New City, Fuzhou 350207, P.R. China.
Nano Lett. 2022 Aug 24;22(16):6492-6500. doi: 10.1021/acs.nanolett.2c01147. Epub 2022 Aug 11.
High-entropy oxide (HEO) including multiple principal elements possesses great potential for various fields such as basic physics, mechanical properties, energy storage, and catalysis. However, the synthesis method of high-entropy compounds through the traditional heating approach is not conducive to the rapid properties screening, and the current elemental combinations of HEO are also highly limited. Herein, we report a rapid synthesis method for HEO through the Joule-heating of nickel foil with dozens of seconds. High-entropy rocksalt oxides (HERSO) with the new elemental combination, high-entropy spinel oxides (HESO), and high-entropy perovskite oxide (HEPO) have been synthesized through the Joule-heating. The synthesized HERSO with new elemental combinations proves to be a great promotion of OER activity due to the synergy of multiple components and the continuous electronic structure experimentally and theoretically. The demonstrated synthesis approach and the new component combination of HERSO provide a broad platform for the development of high-entropy materials and catalysts.
包含多种主元素的高熵氧化物（HEO）在基础物理、机械性能、能量存储和催化等各个领域具有巨大潜力。然而，通过传统加热方法合成高熵化合物不利于快速筛选性能，并且目前HEO的元素组合也非常有限。在此，我们报告了一种通过对镍箔进行数十秒的焦耳加热来快速合成HEO的方法。通过焦耳加热合成了具有新元素组合的高熵岩盐氧化物（HERSO）、高熵尖晶石氧化物（HESO）和高熵钙钛矿氧化物（HEPO）。实验和理论证明，合成的具有新元素组合的HERSO由于多种组分的协同作用和连续的电子结构，对析氧反应（OER）活性有很大的提升。所展示的合成方法和HERSO的新组分组合为高熵材料和催化剂的开发提供了一个广阔的平台。
