Wang Xiao, Li Bo, Wu Ya-Pan, Tsamis Alkiviadis, Yu Hong-Guang, Liu Shan, Zhao Jun, Li Yong-Shuang, Li Dong-Sheng
Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, P. R. China.
School of Engineering, University of Leicester, Leicester, Leicestershire LE1 7RH, United Kingdom.
Inorg Chem. 2020 Apr 6;59(7):4764-4771. doi: 10.1021/acs.inorgchem.0c00024. Epub 2020 Mar 24.
Understanding the active species derived from metal-organic frameworks (MOFs) plays a vital role in the fabrication of highly efficient and stable oxygen evolution reaction (OER) electrocatalysts. Herein, a new alkaline-stable 3D nickel metal-organic framework (Ni-MOF), containing a 1D rod-packing chain structure fused with a tetranuclear nickel cluster [Ni(μ-OH)], is used as a target material to explore its OER properties. The electrocatalytic activities of pure Ni-MOF and hybrid materials made from Ni-MOF with different acetylene black loaded electrodes, such as glassy carbon, fluorine-doped tin oxide, and nickel foam, have been evaluated. Further analysis unravels that the enhanced OER performance might be attributed to the synergistic interactions of two catalytic active species between in situ formed β-Ni(OH) and a tetranuclear Ni(μ-OH) cluster in Ni-MOF. The findings will shed fresh light on the fabrication of MOF-derived catalysts for efficient electrochemical energy conversion.
了解源自金属有机框架（MOF）的活性物种在制备高效稳定的析氧反应（OER）电催化剂中起着至关重要的作用。在此，一种新型的碱性稳定三维镍金属有机框架（Ni-MOF），其包含与四核镍簇[Ni(μ-OH)]融合的一维棒状堆积链结构，被用作目标材料来探究其OER性能。已评估了纯Ni-MOF以及由Ni-MOF与不同乙炔黑负载电极（如玻碳、氟掺杂氧化锡和泡沫镍）制成的混合材料的电催化活性。进一步分析表明，增强的OER性能可能归因于原位形成的β-Ni(OH)与Ni-MOF中的四核Ni(μ-OH)簇之间两种催化活性物种的协同相互作用。这些发现将为用于高效电化学能量转换的MOF衍生催化剂的制备提供新的思路。
