Wang Tao, Fan Juntian, Do-Thanh Chi-Linh, Suo Xian, Yang Zhenzhen, Chen Hao, Yuan Yating, Lyu Hailong, Yang Shize, Dai Sheng
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
Department of Chemistry, Joint Institute for Advanced Materials, University of Tennessee, Knoxville, TN, 37996, USA.
Angew Chem Int Ed Engl. 2021 Apr 26;60(18):9953-9958. doi: 10.1002/anie.202101120. Epub 2021 Mar 18.
The successful integration or hybridization of perovskite oxides with their halide cousins would enable the formation of both multi-anionic and multi-cationic solid solutions with unique metal-ion sites and synergistic properties that could potentially surpass the performance of classic perovskites. However, such solid solutions had not been produced previously owing to their distinct formation energies and different synthesis conditions. Solid solutions combining perovskite oxides with fluorides were produced in this study by mechanochemical synthesis. The obtained perovskite oxide-halide solid solutions had highly mixed elements and valences, uniform element distributions, and single-phase crystalline structures. The solid solution with an optimized combination of oxides and fluorides exhibited enhanced catalytic performance in the oxygen evolution reaction.
钙钛矿氧化物与其卤化物同类物的成功整合或杂化将能够形成具有独特金属离子位点和协同特性的多阴离子和多阳离子固溶体，其性能可能超越传统钙钛矿。然而，由于它们不同的形成能和不同的合成条件，此前尚未制备出此类固溶体。本研究通过机械化学合成制备了钙钛矿氧化物与氟化物的固溶体。所获得的钙钛矿氧化物 - 卤化物固溶体具有高度混合的元素和化合价、均匀的元素分布以及单相晶体结构。氧化物和氟化物优化组合的固溶体在析氧反应中表现出增强的催化性能。
