Wang Xiaofeng, Zhang Yangping, Liu Tianpeng, Wu Zhengying, Yu Jun, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Industrial Park, Renai Road, Suzhou 215123, PR China.
Jiangsu Key Laboratory for Environment Functional Materials, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China.
J Colloid Interface Sci. 2025 Jan;677(Pt B):740-747. doi: 10.1016/j.jcis.2024.08.111. Epub 2024 Aug 20.
Zeolitic imidazolate frameworks (ZIFs), a class of promising metal organic frameworks (MOFs) material, display high porosity and chemical/thermal stability. However, there are problems such as few active sites and restricted exposed active areas, which limit the oxygen evolution reaction (OER) performance of catalysts. Here, starting from zeolitic imidazolate framework-67 (ZIF-67), we have successfully synthesized Pt-doped CoFe layered double hydroxide (Pt/CoFe LDH) catalysts for efficient OER catalysis. The obtained Pt/CoFe LDH-4 catalysts provides large surface areas and abundant active sites, which further improves the OER performance. In detail, the Pt/CoFe LDH-4 exhibits a lower overpotential of 263 mV at a current density of 40 mA cm, in 1 M KOH solution, the stability of the catalyst exceeds 120 h at this current density, far superior to commercial catalyst RuO. This study describes a new design idea for synthesis of LDH catalytic materials with low noble metal doping, which broadens the way to the synthesis of robust OER catalysts derived from ZIF-67.
沸石咪唑酯骨架材料（ZIFs）是一类很有前景的金属有机骨架材料（MOFs），具有高孔隙率和化学/热稳定性。然而，存在活性位点少和暴露的活性面积受限等问题，这限制了催化剂的析氧反应（OER）性能。在此，我们从沸石咪唑酯骨架-67（ZIF-67）出发，成功合成了用于高效OER催化的铂掺杂钴铁层状双氢氧化物（Pt/CoFe LDH）催化剂。所制备的Pt/CoFe LDH-4催化剂具有大表面积和丰富的活性位点，进一步提升了OER性能。具体而言，Pt/CoFe LDH-4在1 M KOH溶液中，电流密度为40 mA cm时，过电位较低，为263 mV，在此电流密度下催化剂的稳定性超过120 h，远优于商业催化剂RuO₂。本研究描述了一种低贵金属掺杂的LDH催化材料合成的新设计理念，拓宽了源自ZIF-67的稳健OER催化剂的合成途径。
