The metal-organic framework (MOFs) materials formed by the strict assembly of metal nodes and organic ligands have been proved to be ideal precursors for the preparation of various nano-catalysts. However, the carbon framework derived from the template method of MOFs generally inherits the precursors The characteristics of the microporous structure limit the availability of metal active sites in the interior and hinder the mass transfer in the catalytic process. Therefore, it is of great significance to develop electrocatalysts with highly dispersed, highly active metal sites and hierarchical pore structure for use in different catalytic reactions. Based on this, Zhu Qilong, a researcher at the State Key Laboratory of Structural Chemistry of the Fujian Institute of Physics, Chinese Academy of Sciences, and Xu Qiang, a professor at the Japan Institute of Industrial Technology, first used the two-solvent-induced heterogeneous nucleation method with the funding of the National Natural Science Foundation Highly dispersed Ru(III) ion modified ordered macroporous ZIF-8 single crystal (Ru(III)/MSC-ZIF-8) was used as a precursor for further high-temperature pyrolysis to obtain ordered graded porous ultra Structured Ru/N doped nanoporous carbon (Ru/OMSNNC) micro-nano reactor. The Ru clusters with an average particle size of only 1.8 nm are uniformly anchored on the highly ordered superstructure carbon wall, exhibiting a significant size effect and exposing abundant active sites, and three-dimensionally ordered macropore-mesopores -The microporous superstructure provides effective conduction and mass transfer channels. Based on these unique structural advantages, the Ru/OMSNNC micro-nano reactor exhibits ultra-high hydrogen evolution reaction (HER) performance in different pH electrolytes, and its mass activity is an order of magnitude higher than commercial Pt/C. In particular, the HER overpotential of this micro-nano reactor in 1 M KOH electrolyte is only 13 mV@10 mA cm-2, the Tafel slope is as low as 40.41 mV dec-1, and it has 1.6 H2 s- at 25 mV. The ultra-high TOF value of 1 is far better than Pt/C and most of the recently reported HER catalysts. In the actual total hydrolysis system, Ru/OMSNNC can be assembled with its derived OMS-RuO2 anode to form a double-electrode total hydrolysis cell. Under the same cell pressure, the hydrogen production rate of Ru/OMSNNC is much higher than that of Pt/C. In addition, the system can also be directly coupled to commercial solar photovoltaic cells, which has great application potential. This research provides new ideas for the development of high-performance HER catalysts and other advanced catalytic materials that can be used in the future energy field, deepens the understanding of the HER process, and provides experimental and theoretical support for improving the overall performance of HER. Related research results are published online on Advanced Materials. Master student Wu Yulin of Zhu Qilong's research group and assistant researcher Li Xiaofang are the co-first authors of the paper. Shower Floor Drain,Square Cover Floor Drain,Bathroom Shower Floor Drain,Shower Linear Floor Drain Kaiping City Jinqiang Hardware Products Co.,Ltd , https://www.jqfloordrain.com
Structure diagram of ordered hierarchical pore superstructure micro-nano reactor and its electrocatalytic hydrogen production application
Obtained in the research of electrocatalytic hydrogen evolution in all ordered pore micro-nano reactors of Fujian Physics