Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
Functional Materials and Acousto-Optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China.
Phys Chem Chem Phys. 2022 Dec 21;25(1):74-79. doi: 10.1039/d2cp04435h.
Cobaltate has multiple valence states of 3d orbitals, and its oxygen evolution reaction (OER) performance can be adjusted by adjusting the oxygen concentration, internal electronic structure and connection between the lattice to afford superior OER activity. Therefore, cobaltate is considered a promising OER catalyst in alkaline media. Herein, the bending state of LSCO thin film was changed by directly applying mechanical bending, and the curvature diameter of the catalytic electrode was directly controlled. The results show that the OER activity of the LSCO thin film electrode considerably improved under an strain of only ∼0.24%. It also showed that the volcanic trend in OER performance involves two parameters: the tolerance factor of Co and activation energy of oxygen.
钴酸盐具有 3d 轨道的多种价态，通过调节氧浓度、内部电子结构和晶格之间的连接，可以调整其析氧反应（OER）性能，从而提供优异的 OER 活性。因此，钴酸盐被认为是碱性介质中很有前途的 OER 催化剂。在此，通过直接施加机械弯曲来改变 LSCO 薄膜的弯曲状态，从而直接控制催化电极的曲率直径。结果表明，LSCO 薄膜电极在仅约 0.24%的应变量下，OER 活性有显著提高。此外，OER 性能的火山趋势涉及两个参数：Co 的容忍因子和氧的活化能。
