US Mike equipment to help scientific breakthroughs
A research team led by associate researcher Deng Dehui and academician Bao Xinhe of CAS Dalian Institute of Chemical Physics have succeeded in confining the FeN4 structure in the nano-graphene framework based on the long-term study of two-dimensional catalytic materials and nano-sized catalysis and make it excellent The catalytic activity and stability of the catalyst can be highly selectively oxidized to phenol at room temperature or even at 0 ° C. The results of this study provide a new idea and reference for the design of non-noble metal catalysts with high efficiency and selective oxidation at low temperature, and are also good for the upgrading and industrialized production of graphene.
After more than five years' exploration, the research team made high-energy ball milling of phthalocyanine iron and graphene nanosheets by controlling the conditions of milling and cleverly using N atoms to form strong covalent bonds with graphene C atoms to make N atoms as An "anchor" to stabilize the coordination of unsaturated iron centers. The research team also cooperated with Southeast University, Institute of Physics of Chinese Academy of Sciences, Canada and many other parties to achieve a breakthrough in the study of nanometer graphene confined monatomic iron catalyst. The atomic structure of FeN4 in graphene skeleton was first observed. Further theoretical calculations show that the formed FeN4 structure can be effectively stabilized in the graphene framework and can decompose hydrogen peroxide efficiently, thereby enabling the catalytic oxidation of benzene to phenol at room temperature or even 0 ° C.
In this study, the characterization of nano-graphene iron catalyst using the United States Mike Instruments classic automatic chemisorption AutoChem series. Since the release of the AutoChem Series, it has become the instrument of choice for every prestigious university and research organization worldwide. Many of them are renowned institutions and research institutes in China, such as Dalian Institute of Chemical Physics, Tsinghua University, Tongji University, East China University of Science and Technology, South China University of Technology, Tianjin University, Fudan University, Xiamen University, Shanxi Institute of Coal Chemistry, Xi'an Jiaotong University, Jilin University, Sinopec Petrochemical Institute of Science and Technology, CNOOC Tianjin Chemical Research Institute, Lanzhou Petrochemical Research Institute, Shanghai Petrochemical Research Institute, and so are the AutoChem series of users.
AutoChem series has the following technical features:
4 internal temperature control zone can be independently heated, the pipeline up to 150 ℃. Avoid condensing points in the pipeline, for steam experiments.
The small size of the internal piping ensures high resolution and rapid testing, reducing deviations when calculating gas volumes.
The highly sensitive Linear Heat Conduction Detector (TCD) ensures that the calibration volume is kept constant so that the peak area is directly proportional to the volume of reaction gas.
Four high-precision mass flow meters ensure very accurate, programmable gas flow control, ensuring baseline stability and accurate gas volume measurements.
Corrosion resistance The detector filament analyzes most corrosive gases and reduces filament oxidation.
Opening and closing furnace heating quartz sample tube to 1100 ℃. Can set multiple heating rate and analysis parameters, easy to design analysis experiment.
KwikCool cooling furnace can quickly reduce the furnace temperature to ambient temperature, shorten the analysis time, improve the test quantity.
Twelve gas inlets for preparing gas, carrier gas, and Loop gas, respectively, can connect more gases for more complex experiments such as TPR / TPO cycles.
The mass spectrometer port and integrated software allow simultaneous detection on thermal conductivity detectors and mass spectrometers.
Steam generators can perform vapor sorption reactions such as pyridine, benzene and water.
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