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2021-07-08: Our group won the first prize in Liaoning Province Nature Science Award.
The research program of our group “Microstructural design of inorganic membranes and their separation mechanism” won the first prize of Liaoning Provincial Natural Science Award in 2020.
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2021-04-30: Progress on engineering membrane structure used in catalytic membrane reactor for hydrogen separation
Our group reported a method on engineering the structure of the porous support layer by tape-casting and laser grooving to reduce the concentration polarization resistance in the hydrogen separation process. This work has been published in Green Chemical Engineering, 2021, 2, 96-103.
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2020-11-04: Progress on Tuning of Delicate Host-Guest Interaction in MOFs for Diluted Furfural Capture
Our group reports the control over the microenvironment of hydrated MIL-53 and isoreticular variants with diversified functional terephthalic acid linkers for the purpose of preferential binding of furfural through delicate host-guest interactions. The results were published in Angew. Chem. Int. Ed.
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2020-07-31: Progress on in-situ interfacial assembly of ultra-H2-permeable metal-organic framework membranes
Our group reported synthesis of ultrathin oriented MOF membrane via in-situ interfacial assembly method. The membranes exhibited the permeance of H2 with 6300-10680 GPU and H2 selectivity toward CO2 of up to 86.5, far transcending the Robeson’s upper bound for H2/CO2 separation. This ultra-H2-permeable MOF membranes with high selectivity show great promise for energy-efficient separations. This work has been published in Journal of Membrane Science, 2020, 611, 118419, and highlighted as a Editor's Choice Article for June 2020.
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2020-06-18: Progress on high-performance of oxygen transport membrane reactors integrated with IGCC for carbon capture
Our group developed a new IGCC process based on a robust oxygen transport membrane (OTM) reactor, where the OTM reactor is used behind the coal gasifier. This IGCC-OTM process fulfills syngas oxidation, H2 production, and carbon capture in one unit, thus a significant decrease of the energy penalty is expectable. The membrane reactor does not use noble metal components, and exhibits stable performance in a gas mixture mimicking real syngas compositions from a coal gasifier with H2S concentrations up to 1,000 ppm. This work has been published in AIChE Journal, 2020, 66, e16247.
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2020-06-05: Progress on kinetic model for oxygen permeation process
Our group reports an oxygen permeation model that was firstly used to investigate the effect of Ba content in BaxSr1-xCo0.8Fe0.2O3-δ on the oxygen transport kinetics. This work has been published in AIChE Journal, 2020, 66, 16291.
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2020-04-22: Progress on Nano-CeO2-Modified Cathodes for Direct Electrochemical CO2 Reduction in Solid Oxide Electrolysis Cells
Our group fabricated CeO2-modified La0.75Sr0.25Cr0.5Mn0.5O3--Gd0.1Ce0.9O1.95 cathodes to improve CO2 electrochemical reduction performance by infiltration method. This work has been published in ACS Sustainable Chemistry & Engineering, 2019, 7, 9629-9636.
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2020-04-22: Progress on the roles of oxygen vacancies in electrocatalytic oxygen evolution reaction
Our group published a review on the roles of oxygen vacancies in electrocatalytic oxygen evolution reaction (OER). This work has been published in Nano Energy, 2020, 73, 104761.
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2020-04-16: Progress on micro-nanostructural designs of bifunctional electrocatalysts for metal-air batteries
Our group reviewed the micro-nano structural design of materials, and the related methods and strategies are classed into two groups for the improvement of intrinsic and apparent activities. The fine adjustment of nano structures and an in-depth understanding of the reaction mechanism are also discussed briefly. This work has been published in Chin. J. Catal., 2020, 41: 390-403.
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2020-03-15: Progress on the effect of grain size on oxygen transport kinetics
We studied the cobalt-free BaCe0.1Fe0.9O3-δ membranes with different grain sizes by our theoretical model to disclose the influence of grain size on oxygen transport kinetics. Model studies reveal that interfacial oxygen exchange resistances on both sides increase with the increase of grain size, while the bulk diffusion resistance changes slightly. It indicates that grain boundaries are active sites for oxygen exchange reactions and have little effect on the bulk diffusion. This work has been published in Journal of Membrane Science, 2020, 603, 118038.
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2020-02-14: Progress on the selective removal of CO in industrial hydrocarbon-rich off-gases
Our group synthesized a series of CeO2-supported metal oxides catalysts, and investigated the removal performance of CO from the off-gas stream of propane oxidation process. Among them, CuO/CeO2 exhibited the highest surface oxygen vacancy concentration, good low-temperature reduction behavior and the highest adsorption capacity of CO, thus resulting in advance CO removal activity. This work has been published in Journal of Materials Science, 2020, 55, 2321-2332.
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2020-01-27: Progress on molecular sieving mixed matrix membranes
Our group synthesized mixed matrix membranes (MMMs) embodying metal-organic framework ZIF-11 with extremely narrow pore-openings (~3.0 Å of aperture windows) as the nano-fllers for CO2/CH4 separation. The MMMs with filler loading of 24 wt% showed a remarkable improvement in the separation factor of CO2/CH4 as well as CO2 permeability, corresponding to an improvement of 43.5% and 99.5% compared with that of native polymer membranes, respectively. Moreover, in-depth analysis of gas transport properties of the membranes showed that the restricted pore-openings of ZIF-11 performed as satisfied ...
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2020-01-10: Progress on CO2 electroreduction enhanced by transitional layer at cathode/electrolyte interface
Our group introduced a transitional layer between the La0.75Sr0.25Cr0.5Mn0.5O3--Gd0.1Ce0.9O1.95 cathode and the electrolyte to improve CO2 electrochemical reduction performance by a calcining-stripping-calcining method. This work has been published in Journal of Power Sources, 2020, 451, 227743.
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2020-01-07: Progress on metal-organic framework-based CO2 capture
Our group published a review on metal-organic framework-based CO2 capture. This review illustrates a conceptional framework from material design and membrane separation application for CO2 capture, and emphasize two importance themes, namely (i) design and modification of CO2-philic MOF materials that targets secondary building units, pore structure, topology and hybridization and (ii) construction of crack-free membranes through chemical epitaxy growth of active building blocks, interfacial assembly, ultrathin two-dimensional nanosheet assembly and mixed-matrix integration strategies, whic...
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2020-01-01: Progress on kinetic model for oxygen permeation process
Kinetic model is significant for disclosing the oxygen permeation process through mixed ionic-electronic conducting (MIEC) membranes. Based on the dependence of oxygen vacancy concentration on oxygen partial pressure in the bulk of MIEC membrane, we established a universally applicable model for extensive MIEC membranes by revising one assumption in our original model. The extended model can be applied to various MIEC materials. This work has been published in Chemical Engineering Science, 2020, 215 115455.
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2019-12-13: Progress on metal nanocatalysts used in catalytic membrane reactor for hydrogen separation
Our group provided a way to in-situ exsolve Ru nanoparticles and stabilizes the nano active centers by constructing strong metal-support interactions between Ru nanoparticles and the Ce0.85Sm0.15O1.925 (SDC) support. The Ru/SDC catalyst shows high catalytic activity towards both hydrogen oxidation and water splitting reactions. This work has been published in Journal of Membrane Science, 2020, 599, 117702.
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2019-10-09: Progress on non-noble metal catalysts used in catalytic membrane reactor for hydrogen separation
Our group designed a series of non-noble metal catalysts used in membrane reactor for hydrogen separation. The activity increases in the order of Co/SDC < Fe/SDC < Ni/SDC. A model was used to estimate the resistances of surface reaction and bulk diffusion. The hydrogen separation process is jointly controlled by surface reactions and bulk diffusion. This work has been published in Journal of Membrane Science, 2020, 594, 117463.
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2019-10-03: Progress on Solid oxide electrolysis cells for CO2 electroreduction
Our group investigated how alkaline-earth elements (Ca, Sr and Ba) influence the performance of the parent LaFeO3-δ as cathode for CO2 electroreduction in solid oxide electrolysis cells. Sr is the best choice among the three alkaline-earth elements. The optimal doping amount of Sr is 20% in the La-site. This work has been published in Journal of Power Sources, 2019, 443, 227268-227277.
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2019-08-29: Progress on Oxygen-permeable Membranes
Prof. Xuefeng Zhu and Prof. Weishen Yang published a “Progress Report” to show the recent research achievements on microstructural and interfacial designs of oxygen-permeable membranes for oxygen permeation and catalytic membrane reactors. This work has been published in Advanced Materials, 2019, 31,1902547.
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2019-09-02: Progress on Carbon Molecular Sieving Membranes
Our group finely tuned the slit-like pores of carbon molecular sieving membranes (CMSMs) at Ångstrom level by rational manipulations of pyrolysis temperature. CMSMs with the narrow and uniform ultramicropores centered at 6.0 Ångstrom displayed remarkable permeance of n-butaneand separation factor of n-butane/iso-butane. This work has been published in AIChE Journal, 2019, 65, e16749.
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