Xu Shaojie, Huang Qi, Xue Jinhang, Yang Yuandong, Mao Lujiao, Huang Shaoming, Qian Jinjie
Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, P. R. China.
School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, P. R. China.
Inorg Chem. 2022 Jun 13;61(23):8909-8919. doi: 10.1021/acs.inorgchem.2c01035. Epub 2022 Jun 3.
The complex oxygen evolution reaction (OER) is recognized as the most studied and explored electrochemical conversion, which plays a crucial role in energy-related applications. In this work, a series of metal-organic framework (MOF)-derived FeNi oxides from a barrel-shaped Ni-based BMM-10 precursor are conveniently obtained to show an excellent OER performance. Under mild Fe(III) etching, a type of core-shell Fe-BMM-10 can be well preserved and the coordination bond of the middle frame structure is decomposed. Furthermore, the Fe-BMM-10- series is successfully synthesized with a well-preserved morphology compared to precursors after direct oxidation. Finally, followed by initial electrochemical activation, the decomposition of FeNi oxides generates active Fe-doped nickel oxyhydroxides for efficient water oxidation. The improved OER performance stems from the high specific surface area and abundant exposed active centers, as well as the significant synergistic effect between iron and nickel, which is further verified by the theoretical calculation. This approach can be extended to precisely adjust the morphology of MOFs and their derivatives that can result in superior electrocatalytic properties in terms of energy conversion and storage applications.
复杂析氧反应（OER）被认为是研究和探索最多的电化学转化反应，在能源相关应用中起着至关重要的作用。在这项工作中，通过桶状镍基BMM-10前驱体方便地获得了一系列金属有机框架（MOF）衍生的FeNi氧化物，其表现出优异的OER性能。在温和的Fe(III)蚀刻条件下，一种核壳结构的Fe-BMM-10能够得到很好的保留，中间框架结构的配位键发生分解。此外，与直接氧化后的前驱体相比，Fe-BMM-10系列成功合成并保持了良好的形态。最后，经过初步的电化学活化后，FeNi氧化物分解生成活性的铁掺杂羟基氧化镍用于高效水氧化。OER性能的提高源于高比表面积和大量暴露的活性中心，以及铁和镍之间显著的协同效应，理论计算进一步验证了这一点。这种方法可以扩展到精确调控MOF及其衍生物的形态，从而在能量转换和存储应用方面产生优异的电催化性能。
