College of Material and Chemical Engineering, Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials , China Three Gorges University , Yichang 443002 , China.
Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering , Beijing University of Technology , Beijing 100124 , P. R. China.
ACS Appl Mater Interfaces. 2018 Apr 18;10(15):12740-12749. doi: 10.1021/acsami.8b01970. Epub 2018 Apr 9.
The development of novel strategy to produce new porous carbon materials is extremely important because these materials have wide applications in energy storage/conversion, mixture separation, and catalysis. Herein, for the first time, a novel 3D carbon substrate with hierarchical pores derived from commercially available Cu-MOF (metal-organic framework) (HKUST-1) through carbonization and chemical etching has been employed as the catalysts' support. Highly dispersed Pt nanoparticles and amorphous nickel were evenly dispersed on the surface or embedded within carbon matrix. The corresponding optimal composite catalyst exhibits a high mass-specific peak current of 1195 mA mg Pt and excellent poison resistance capacity ( I/ I = 1.58) for methanol oxidation compared to commercial Pt/C (20%). Moreover, both composite catalysts manifest outstanding properties in the reduction of nitrophenol and demonstrate diverse selectivities for 2/3/4-nitrophenol, which can be attributed to different integrated forms between active species and carbon matrix. This attractive route offers broad prospects for the usage of a large number of available MOFs in fabricating functional carbon materials as well as highly active carbon-based electrocatalysts and heterogeneous organic catalysts.
开发新型策略来制备新型多孔碳材料非常重要，因为这些材料在储能/转换、混合物分离和催化等领域有广泛的应用。在此，首次通过碳化和化学刻蚀，将一种新型的具有分级孔的 3D 碳基材料（源自市售的 Cu-MOF（金属有机骨架）[HKUST-1]）用作催化剂的载体。高度分散的 Pt 纳米粒子和非晶态镍均匀地分散在碳基质的表面或嵌入其中。相应的最佳复合催化剂在甲醇氧化中表现出高比质量峰电流（1195 mA mg Pt）和优异的抗毒能力（ I/ I = 1.58），优于商业 Pt/C（20%）。此外，两种复合催化剂在还原硝基苯酚方面均表现出优异的性能，并对 2/3/4-硝基苯酚表现出不同的选择性，这归因于活性物质与碳基质之间的不同结合形式。这种有吸引力的方法为在制备功能性碳材料以及高活性碳基电催化剂和多相有机催化剂方面大量使用可用的 MOF 提供了广阔的前景。
