Wu Jia-Qian, Zhao Zi-Hao, Hua Yi-Wei, Wu Ya-Ling, Ye Si-Yuan, Qian Jin-Tao, Li Meng-Li, Zhu Lian-Wen, Yan Zheng, Cao Xuebo
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P.R. China.
College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, P.R. China.
Inorg Chem. 2023 Sep 25;62(38):15641-15650. doi: 10.1021/acs.inorgchem.3c02332. Epub 2023 Sep 10.
When it comes to an efficient catalytic oxygen evolution reaction (OER) in the production of renewable energy and chemicals, the construction of heterogeneous structures is crucial to break the linear scalar relationship of a single catalyst. This heterogeneous structure construction helps creatively achieve high activity and stability. However, the synthesis process of heterogeneous crystalline materials is often complex and challenging to capture and reproduce, which limits their application. Here, the dynamic process of structural changes in in alkali was captured by in situ powder X-ray diffraction, FT-IR spectroscopy, and Raman spectroscopy, and several self-reconfigured MOF heterogeneous materials with different structures were stably isolated. The created β-Co(OH)/Co-MOF heterojunction structure facilitates rapid mass-charge transfer and exposure of active sites, which significantly enhanced OER activity. Experimental results show that this heterogeneous structure achieves a low overpotential of 333 mV at 10 mA cm. The findings provide new insights and directions for the search for highly reactive cobalt-based MOFs for sustainable energy technologies.
在可再生能源和化学品生产中实现高效催化析氧反应（OER）时，构建异质结构对于打破单一催化剂的线性标度关系至关重要。这种异质结构的构建有助于创造性地实现高活性和稳定性。然而，异质晶体材料的合成过程通常复杂且难以捕捉和重现，这限制了它们的应用。在此，通过原位粉末X射线衍射、傅里叶变换红外光谱和拉曼光谱捕捉了在碱中结构变化的动态过程，并稳定分离出了几种具有不同结构的自重构MOF异质材料。所创建的β-Co(OH)/Co-MOF异质结结构促进了快速的质量-电荷转移和活性位点的暴露，显著增强了OER活性。实验结果表明，这种异质结构在10 mA cm时实现了333 mV的低过电位。这些发现为寻找用于可持续能源技术的高活性钴基金属有机框架提供了新的见解和方向。
