Direct catalytic transformation of syngas(CO/H_(2)) into high value-added hydrocarbons has been one of the most attractive,yet challenging issues in C1 chemistry. In recent years, the concept of oxide-zeolite(OXZEO) b...Direct catalytic transformation of syngas(CO/H_(2)) into high value-added hydrocarbons has been one of the most attractive,yet challenging issues in C1 chemistry. In recent years, the concept of oxide-zeolite(OXZEO) bifunctional catalysis has emerged and spurred renewed enthusiasm in this field [1,2]. This method describes the use of selected oxide-zeolite-based composite catalysts for the direct syngas-to-hydrocarbons conversion.展开更多
Two-dimensional(2D) layered materials are widely applied in energy devices including lithium-ion battery and supercapacitor due to their unique properties,such as tunable interlayer structure,numerous active sites,lar...Two-dimensional(2D) layered materials are widely applied in energy devices including lithium-ion battery and supercapacitor due to their unique properties,such as tunable interlayer structure,numerous active sites,large aspect ratio versatile interlayer chemistry.In this work,2D layered tungstate acidlinked polyaniline(TALP) presented a fluid-in-solid structure,which allowed facile exchange of the interlayer fluid from moisture to conventional Li^(+) containing electrolyte.With fast and stable dual ion storage(Li^(+) and PF_(6)^(-)),TALP demonstrates high-rate volumetric capacity(39 mAh cm_(-3) at 2000 mA g^(-1)) and good stability(2000 cycles at 200 mA g^(-1)) within the working potential window of 1.5-4.5 V versus Li^(+)/Li.展开更多
Solid solutions of the lead-free ferroelectric oxides Bi_(0.5)Na_(0.5)TiO_(3)(BNT)and Bi_(0.5)Na_(0.5)TiO_(3)(BKT),represented as(1-x)BNT-xBKT,are studied for very close compositions in the range0≤x≤0.36 to understa...Solid solutions of the lead-free ferroelectric oxides Bi_(0.5)Na_(0.5)TiO_(3)(BNT)and Bi_(0.5)Na_(0.5)TiO_(3)(BKT),represented as(1-x)BNT-xBKT,are studied for very close compositions in the range0≤x≤0.36 to understand the correlation between the structure and the properties.Compositions are varied in steps of △x=0.02 in the range0≤x≤0.1 and0.2≤x≤0.36 and△x=0.01 in the range 0.1≤x≤0.2,to precisely locate the structural transition as well as the morphotropic phase boundary(MPB)region and the compositional region of best performance.Rietveld refinement analysis of the powder X-ray diffraction patterns showed monoclinic phase up to x=0.17 and a mixture of monoclinic and tetragonal phases for x>0.17.Similarly,the density and the dielectric constant showed linear variation up to x=0.17 and a large increase above this composition,showing maximum values in the compositional range 0.22≤x≤0.26,corresponding to the MPB region.Microstructural features also showed corresponding changes,indicating close relationship between the structure,microstructure and properties of the different compositions.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.21773230,91945302,21902158,22002165)the Liao Ning Revitalization Talents Program(XLYC1807207)+5 种基金the China National Postdoctoral Program for Innovative Talents(BX20190321)the China Postdoctoral Science Foundation(2019M651161,2019M651154)the DICP&QIBEBT UN201808the DICP I202104the EPSRC Institutional Sponsorship for funding(EP/P511353/1)The DNP MAS NMR experiments were performed at the Nottingham DNP MAS NMR Facility which is funded by the University of Nottingham and EPSRC(EP/L022524/1 and EP/R042853/1)。
文摘Direct catalytic transformation of syngas(CO/H_(2)) into high value-added hydrocarbons has been one of the most attractive,yet challenging issues in C1 chemistry. In recent years, the concept of oxide-zeolite(OXZEO) bifunctional catalysis has emerged and spurred renewed enthusiasm in this field [1,2]. This method describes the use of selected oxide-zeolite-based composite catalysts for the direct syngas-to-hydrocarbons conversion.
基金financially supported by the Australian Research Council Discovery Projects Discovery Project(DP190101008)Future Fellowship(FT190100058)+2 种基金ARC ITRP(IH180100020)the UNSW Scientia Program,and the UNSW-SJTU joint grantpartially supported by funding from the UNSW Digital Grid Futures Institute,UNSW,Sydney,under a cross disciplinary fund scheme。
文摘Two-dimensional(2D) layered materials are widely applied in energy devices including lithium-ion battery and supercapacitor due to their unique properties,such as tunable interlayer structure,numerous active sites,large aspect ratio versatile interlayer chemistry.In this work,2D layered tungstate acidlinked polyaniline(TALP) presented a fluid-in-solid structure,which allowed facile exchange of the interlayer fluid from moisture to conventional Li^(+) containing electrolyte.With fast and stable dual ion storage(Li^(+) and PF_(6)^(-)),TALP demonstrates high-rate volumetric capacity(39 mAh cm_(-3) at 2000 mA g^(-1)) and good stability(2000 cycles at 200 mA g^(-1)) within the working potential window of 1.5-4.5 V versus Li^(+)/Li.
文摘Solid solutions of the lead-free ferroelectric oxides Bi_(0.5)Na_(0.5)TiO_(3)(BNT)and Bi_(0.5)Na_(0.5)TiO_(3)(BKT),represented as(1-x)BNT-xBKT,are studied for very close compositions in the range0≤x≤0.36 to understand the correlation between the structure and the properties.Compositions are varied in steps of △x=0.02 in the range0≤x≤0.1 and0.2≤x≤0.36 and△x=0.01 in the range 0.1≤x≤0.2,to precisely locate the structural transition as well as the morphotropic phase boundary(MPB)region and the compositional region of best performance.Rietveld refinement analysis of the powder X-ray diffraction patterns showed monoclinic phase up to x=0.17 and a mixture of monoclinic and tetragonal phases for x>0.17.Similarly,the density and the dielectric constant showed linear variation up to x=0.17 and a large increase above this composition,showing maximum values in the compositional range 0.22≤x≤0.26,corresponding to the MPB region.Microstructural features also showed corresponding changes,indicating close relationship between the structure,microstructure and properties of the different compositions.
