A Surfactant‐Free and Scalable General Strategy for Synthesizing Ultrathin Two‐Dimensional Metal–Organic Framework Nanosheets for the Oxygen Evolution Reaction. Issue 38 (8th August 2019)

• Record Type: Journal Article
• Authors: Zhuang, Linzhou; Ge, Lei; Liu, Hongli; Jiang, Zongrui; Jia, Yi; Li, Zhiheng; Yang, Dongjiang; Hocking, Rosalie K.; Li, Mengran; Zhang, Longzhou; Wang, Xin; Yao, Xiangdong; Zhu, Zhonghua
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 38(2019)
• Page Start: 13565
• Page End: 13572
• Publication Date: 2019-08-08
• Subjects: coordinatively unsaturated metal sites -- heterogeneous catalysis -- metal–organic frameworksnanosheets -- oxygen evolution reaction; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201907600
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Metal–organic framework (MOFs) two‐dimensional (2D) nanosheets have many coordinatively unsaturated metal sites that act as active centres for catalysis. To date, limited numbers of 2D MOFs nanosheets can be obtained through top‐down or bottom‐up synthesis strategies. Herein, we report a 2D oxide sacrifice approach (2dOSA) to facilely synthesize ultrathin MOF‐74 and BTC MOF nanosheets with a flexible combination of metal sites, which cannot be obtained through the delamination of their bulk counterparts (top‐down) or the conventional solvothermal method (bottom‐up). The ultrathin iron–cobalt MOF‐74 nanosheets prepared are only 2.6 nm thick. The sample enriched with surface coordinatively unsaturated metal sites, exhibits a significantly higher oxygen evolution reaction reactivity than bulk FeCo MOF‐74 particles and the state‐of‐the‐art MOF catalyst. It is believed that this 2dOSA could provide a new and simple way to synthesize various ultrathin MOF nanosheets for wide applications. Abstract : Think thin : The so‐called 2D oxide sacrifice approach is developed to coordinate the metal atoms of amorphous metal oxide nanosheets with ligands to synthesize metal–organic framework (MOF) nanosheets. The resulting ultrathin FeCo MOF‐74 nanosheets (2.6 nm) show an excellent oxygen evolution reaction (OER) activity owing to abundant coordinatively unsaturated metal sites and heteroatom synergy.