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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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2019-07-24: Visit to DICP Changxing Island Campus
Our group had one day-visit to DICP Changxing Island Campus. The whole campus occupies 570,000 m2 and will be used for pilot research and development projects, and major science facilities. Our group established
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2019-06-13: 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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2019-06-10: Progress on Solid oxide electrolysis cells for CO2 electroreduction
Our group revealed the negative effect of Ni doping into SrFe1.5Mo0.5O6-d as cathode for CO2 electroreduction in solid oxide electrolysis cells. Ni doping decreases the perovskite stability under electroreduction conditions, Fe and Ni cations in the B-site are reduced to metal nanoparticles and SrCO3 forms on the surface of the perovskite. This work has been published in Journal of Energy Chemistry, 2019, 36, 87-94.
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2019-05-14: Progress on metal-organic framework nanosheet-based
Our group developed a novel amphiphilic metal-organic framework nanosheet membrane with poly(amidoamine) (PAMAM) nanoparticles to serve as cross-linkers. The PAMAM cross-linked nanosheet membrane exhibited an enhanced structural stability in water solution and displayed a remarkable rejection rate for dye molecules. This strategy will certainly shed light on the 2D nanosheet-based molecular sieve ...
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2019-04-22: Progress on dual-phase membrane reactor for hydrogen separation
Our group designed and prepared a new membrane material Ce0.85Sm0.15O1.925 - Sr2Fe1.5Mo0.5O6-δ (SDC-SFM) for hydrogen separation. It exhibited high performance and good tolerance to CO2 and H2S impurities. The membrane reactor was operated steadily for 532 h under atmospheres containing CO2 and H2S impurities. This work has been published in AIChE Journal, 2019, 65, 1088–1096.
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2019-01-29: Progress on oxygen evolution reaction
NiFe-based electrocatalysts undergo a structural transformation and progressive oxidation during the oxygen evolution reaction (OER). Recent advances regarding in situ techniques for the characterization of NiFe-based electrocatalysts are summarized in this Minireview. This work has been published in Angew. Chem. Int. Ed. 2019, 58, 1252-1265.
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2019-01-28: Progress on energy-efficient coproduction of two kinds of synthesis gases in MIEC membrane reactor
Our group prepared an asymmetric dual-phase oxygen-permeable membrane for the coproduction of H2/N2 and H2/CO synthesis gases. Excellent performance, outstanding membrane material stability and an energy saving high up to 66.5% were achieved. This work has been published in International Journal of Hydrogen Energy, 2019, 44, 4218-4227.
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2018-12-14: Progress on Hydrogen Separation Process in Oxygen-Permeable Membrane Reactors
Our group prepared and tested three membranes with different thicknesses and structural types to study the effect of membrane thickness and structural type on their hydrogen separation performance, which offered guidance for the subsequent study on improving the performance of the membrane reactor. This work has been published in Journal of Membrane Science, 2019, 573, 370-376.
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2018-12-08: Prof. Xuefeng Zhu Won the Honorary Title of Excellent Membership of Youth Innovation Promotion Association, CAS
Prof. Xuefeng Zhu Won the Honorary Title of Excellent Membership of Youth Innovation Promotion Association, CAS.
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2018-12-05: Two Monographs Won the First Prize of of Natural Science Academic Achievement of Liaoning Province
Two Monographs,"Metal-Organic Framework Membranes" and "Mixed Conducting Ceramic Membranes: Fundamentals, Materials and Applications" won the first prize of of Natural Science Academic Achievement of Liaoning Province.
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2018-10-06: Progress on Polyoxometalate Catalysts for the Oxidation of Isobutane
Our group synthesized Cs-salts of the Keggin-type phosphomolybdic acid with simultaneous doping of VO2+ and different transition metals, and found that, due to the synergistic effect between co-substituted VO2+ and Cu2+ in its secondary structure, Cs2.0V0.3Cu0.2PMo12O40 catalyst with exhibits higher catalytic performance for the oxidation of isobutane to methacrylic acid. This work has been publis...
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