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Renewable hydrogen production from steam reforming of glycerol(SRG)over ceria-modified Y-alumina supported Ni catalyst

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chinese Journal of Chemical Engineering 2020年第9期28卷 2328-2336页

作者： Ammaru Ismaila Huanhao Chen Yan Shao Shaojun Xu Yilai Jiao Xueli Chen Xin Gao Xiaolei Fan Department of Chemical Engineering and Analytical Science School of EngineeringThe University of ManchesterOxford RoadManchester M139PLUnited Kingdom School of Biotechnology and Health Sciences Wuyi UniversityJiangmen 52920China School of Chemistry Cardiff UniversityMain BuildingPark PlaceCardiffCF103ATUnited Kingdom UK Catalysis Hub Research Complex at HarwellRutherford Appleton LaboratoryHarwellOxon OX110FAUnited Kingdom Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Institute of Clean Coal Technology East China University of Science and TechnologyShanghai 200237China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

Excess crude glycerol derived as a by-product from biodiesel industry prompts the need to valorise glycerol to value-added *** this context,catalytic steam reforming of glycerol(SRG) was proposed as a promising and sustainable alternative for producing renewable hydrogen(H2).Herein,the development of nickel(Ni) supported on ceria-modified mesoporous γ-alumina(γ-Al2 O3) catalysts and their applications in catalytic SRG(at550-750℃ atmospheric pressure and weight hourly space velocity,WHSV,of 44,122 ml·g^-1·h^-1(STP)) is *** of the developed catalysts were characterised using many technique *** findings show that ceria modification improved Ni dispersion on γ-Al2 O3 catalyst support with highly active small Ni particles,which led to a remarkable catalytic performance with the total glycerol conversion(ca.99%),glycerol conversion into gaseous products(ca.77%) and H2 yield(ca.62%).The formation rate for H2 production(14.4 ×10^(-5)mol·s^-1·g^-1, TOF(H2)=3412 s^-1) was significantly improved with the Ni@12 Ce-Al2 O3 catalyst,representing nearly a 2-fold increase compared with that of the conventional Ni@AI2 O3 *** addition,the developed catalyst also exhibited comparatively high stability(for 12 h) and coke resistance ability.

关键词： Steam reforming of glycerol(SRG) Hydrogen(H2) Nickel(Ni)catalysts Ceria Y-Alumina(γ-Al2O3)

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Genomic prediction of the performance of hybrids and the combining abilities for line by tester trials in maize

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The Crop Journal 2022年第1期10卷 109-116页

作者： Ao Zhang Paulino Pérez-Rodríguez Felix San Vicente Natalia Palacios-Rojas Thanda Dhliwayo Yubo Liu Zhenhai Cui Yuan Guan Hui Wang Hongjian Zheng Michael Olsen Boddupalli M.Prasanna Yanye Ruan Jose Crossa Xuecai Zhang College of Biological Science and Technology Shenyang Agricultural UniversityShenyang 110866LiaoningChina b International Maize and Wheat Improvement Center(CIMMYT) El BatanTexcoco 56237Mexico CIMMYT-China Specialty Maize Research Center Shanghai Academy of Agricultural SciencesShanghai 200063China Colegio de Postgraduados Estado De MéxicoMexico Crop Breeding and Cultivation Research Institute Shanghai Academy of Agricultural SciencesShanghai 200063China International Maize and Wheat Improvement Center(CIMMYT) P.O.Box 1041Village MarketNairobi 00621Kenya

The two most important activities in maize breeding are the development of inbred lines with high values of general combining ability(GCA)and specific combining ability(SCA),and the identification of hybrids with high yield *** selection(GS)is a promising genomic tool to perform selection on the untested breeding material based on the genomic estimated breeding values estimated from the genomic prediction(GP).In this study,GP analyses were carried out to estimate the performance of hybrids,GCA,and SCA for grain yield(GY)in three maize line-by-tester trials,where all the material was phenotyped in 10 to 11 multiple-location trials and genotyped with a mid-density molecular marker *** showed that the prediction abilities for the performance of hybrids ranged from 0.59 to0.81 across all trials in the model including the additive effect of lines and *** the model including both additive and non-additive effects,the prediction abilities for the performance of hybrids were improved and ranged from 0.64 to 0.86 across all *** prediction abilities of the GCA for GY were low,ranging between-0.14 and 0.13 across all trials in the model including only inbred lines;the prediction abilities of the GCA for GY were improved and ranged from 0.49 to 0.55 across all trials in the model including both inbred lines and testers,while the prediction abilities of the SCA for GY were negative across all *** prediction abilities for GY between testers varied from-0.66 to 0.82;the performance of hybrids between testers is difficult to *** offers the opportunity to predict the performance of new hybrids and the GCA of new inbred lines based on the molecular marker information,the total breeding cost could be reduced dramatically by phenotyping fewer multiple-location trials.

关键词： Maize Genomic selection Line-By-Tester General combining ability Specific combining ability

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In-situ Dendrite/Metallic Glass Matrix Composites:A Review

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Journal of Materials Science & Technology 2013年第8期29卷 685-701页

作者： Junwei Qiao Laboratory of Applied Physics and Mechanics of Advanced Materials College of Materials Science and EngineeringTaiyuan University of Technology

The advanced fabrication of in-situ dendrite/metallic glass matrix （MGM） composites is reviewed. Herein, the semi- solid processing and Bridgman solidification are two methods, which can make the dendrites homogeneously dispersed within the metallic glass matrix. Upon quasi-static compressive loading at room temperature, almost all the in-situ composites exhibit improved plasticity, due to the effective block to the fast propagation of shear bands. Upon quasi-static tensile loading at room temperature, although the composites possess tensile ductility, the inhomogeneous deformation and associated softening dominates. High volume-fractioned dendrites and network structures make in-situ composites distinguishingly plastic upon dynamic compression. In-situ composite exhibits high tensile strength and softening （necking） in the supercooled liquid region, since the presence of high volume-fractioned dendrites lowers the rheology of the viscous glass matrix at high temperatures. At cryogenic temperatures, a distinguishingly-increased maximum strength is available; however, a ductile-to-brittle transition seems to be present by lowering the temperature. Besides, improved tension-tension fatigue limit of 473 MPa and four-point-bending fatigue limit of 567 MPa are gained for Zr58.5Ti14.3Nb5.2Cu6.1Ni4.9Be11.0 MGM composites. High volume-fraction dendrites within the glass matrix induce increased effectiveness on the blunting and propagating resistance of the fatigue-crack tip. The fracture toughness of in-situ composites is comparable to those of the toughest steels and crystalline Ti alloys. During steady-state crack-growth, the confinement of damage by in-situ dendrites results in enhancement of the toughness.

关键词： Bulk metallic glasses Composites Mechanical properties Dynamic loading Microstructures Shear bands

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Microwave-Assisted the Preparation of Tetrahedrocarbazole and Its Derivatives using Organiczinc Reagents under Mild Conditions

Microwave-Assisted the Preparation of Tetrahedrocarbazole an...

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第十六届全国金属有机化学学术讨论会

作者： Benjamin A.Haag Paul Knochel Department of Chemistry and Biochemistry Ludwig-Maximilians-University

＜正＞The development of novel methods for the preparation of biologically active molecules under mild conditions is a long-term pursuing area and is of great interest in the field of pharmaceutical ***-containing heterocycles,especially indole and tetrahydrocarbazole,widely found in natural products and anti-tumor medicines,

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Protecting endemic seed plants on the Tibetan Plateau under future climate change: migration matters

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Journal of Plant Ecology 2019年第6期12卷 962-971页

作者： Yujing Yan Zhiyao Tang Institute of Ecology College of Urban and Environmental SciencesKey Laboratory of Earth Surface Processes of Ministry of EducationPeking UniversityBeijing 100871China Center for Macroecology Evolution and ClimateNatural History Museum of DenmarkUniversity of CopenhagenCopenhagen 2100Denmark

Aims Climate change in the near future may become a major threat to high-altitude endemics by greatly altering their *** aims are to(i)assess the potential impacts of future climate change on the diversity and distribution of seed plants endemic to the Tibetan Plateau and(ii)evaluate the conservation effectiveness of the current National Nature Reserves(NNRs)in protecting the endemic plants in the face of climate *** We projected range shifts of 993 endemic species to the years 2050 and 2070 under two representative concentration pathway scenarios using an ensemble species distribution modeling framework and evaluated range loss,species-richness change and coverage of the current conservation network considering two dispersal *** Findings In a full-dispersal scenario,72–81%of the species would expand their distribution by 2070,but 6–20%of the species would experience>30%range *** species would shift to the *** projected species net richness would increase across the region on *** a no-dispersal scenario,15–59%of the species would lose>30%of their current habitat by *** species loss may occur in the southeastern and the eastern peripheral *** percent of species ranges are covered by the NNRs on average and may increase in the future if species disperse *** found a significant difference of species redistribution patterns between different dispersal scenarios and highlighted the importance of migration in this region.

关键词： biodiversity global change impact assessment nature reserves species conservation species distribution models

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Hydrothermal pretreatment of rice straw at relatively lower temperature to improve biogas production vict anaerobic digestion

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chinese Chemical Letters 2019年第6期30卷 1219-1223页

作者： Tao Luo Hailong Huang Zili Mei Fei Shen Yihong Ge Guoquan Hu Xi Meng Biogas Institute of Ministry of Agriculture (BIOMA) Chengdu 610041 China College of Environment Sciences Sichuan Agricultural University Chengdu 611130 China

Although the degradation mechanism of straw anaerobic digestion is still obscure,lower temperature thermop hysical pretreatment might be a feasible way to improve biogas fermentation efficiency and net energy production in whole *** this study,the performances of rice straw(RS)degradation and biogas production were examined at different pretreatment temperatures from 90 ℃ to 130℃ to identify the optimal *** increasing pretreatment temperature,the change in cellulose and hemicellulose degradation in all the tests was directly related to volatile fatty acids(VFAs)content,but did not correspond to the variation in cumulative methane *** 100℃ and 130℃presented similar ideal digestion performances with highest methane yields of 127.6 and 124.6 mL/g TS,respectively,which were 22.80%and 19.83%higher than that noted in the *** test at 100 ℃pretreatment,which achieved 12.8%higher net energy production from RS than that observed in the control,could be considered as the optimal choice,the surplus biogas could only meet 75.9%of energy requirement for pretreated water temperature ***,mesophilic or thermophilic fermentation,lower pretreatment water input,and reuse of excess heat are recommended as feasible working conditions for improving net biogas production.

关键词： Ignocellulosic Degradation Fermentation Whole slurry Net energy

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Ultrathin Ti_(3)C_(2)T_(x)（MXene） Nanosheet-Wrapped NiSe_(2) Octahedral Crystal for Enhanced Supercapacitor Performance and Synergetic Electrocatalytic Water Splitting

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Nano-Micro Letters 2019年第2期11卷 179-192页

作者： Hanmei Jiang Zegao Wang Qian Yang Luxi Tan Lichun Dong Mingdong Dong Interdisciplinary Nanoscience Center(iNANO) Aarhus University8000 Aarhus-CDenmark School of Chemistry and Chemical Engineering Key Laboratory of Low-grade Energy Utilization Technologies and Systems of the Ministry of EducationChongqing UniversityChongqing 400044People’s Republic of China College of Materials Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871People’s Republic of China

Metal selenides,such as NiSe2,have exhibited great potentials as multifunctional materials for energy storage and ***,the utilization of pure NiSe2 as electrode materials is limited by its poor cycling stability,low electrical conductivity,and insufficient electrochemically active *** remedy these defects,herein,a novel NiSe2/Ti3C2Tx hybrid with strong interfacial interaction and electrical properties is fabricated,by wrapping NiSe2 octahedral crystal with ultrathin Ti3C2Tx MXene *** NiSe2/Ti3C2Tx hybrid exhibits excellent electrochemical performance,with a high specific capacitance of 531.2 Fg-1 at1 A g-1 for supercapacitor,low overpotential of 200 mV at 10 mA g-1,and small Tafel slope of 37.7 mV dec-1 for hydrogen evolution reaction(HER).Furthermore,greater cycling stabilities for NiSe2/Ti3C2Tx hybrid in both supercapacitor and HER have also been *** significant improvements compared with unmodified NiSe2 should be owing to thestrong interfacial interaction between NiSe2 octahedral crystal and Ti3C2Tx MXene,which provides enhanced conductivity,fast charge transfer as well as abundant active sites,and highlight the promising potentials in combinations of MXene with metal selenides for multifunctional applications such as energy storage and conversion.

关键词： MXene NiSe_(2) Supercapacitor Water splitting

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Dynamic Mechanism of Relaxation Paths Occurring in TPA-DCPP： Roles of Solvent and Temperature

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Chemical Research in chinese Universities 2017年第3期33卷 400-405页

作者： ZHONG Qiulin CHEN Ying WANG Yinghui CHI Xiaochun WANG Yue NI Moueui ZHANG Hanzhuang Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China State Key Laboratory of Supramoleeular Structure and Materials Jilin University Changehun 130012 R R. China Department of Chemistry University of California at Irvine California 92697-2025 USA

The relaxation paths for triphenylamine（TPA）-2,3-dicyanopyrazino phenanthrene（DCPP）, which has a pull-push structure, were investigated via steady-state, time-resolved spectroscopy involving transient absorption and time-correlated single photon counting. By changing the solvent polarity we found that an intramolecular charge transfer（ICT） state acting as a ＂bright＂ state was responsible for the fluorescence character of TPA-DCPP. Meanwhile, a ＂dark＂ state gradually appeared and competed with the ICT state. This was likely to be responsible for the polarity-dependent evolution of fluorescence intensity and fluorescence lifetime. The temperature-dependent fluorescence character of the TPA-DCPP in toluene exhibited ICT processes at high temperatures prior to the relaxation path from the initial excited state to the ground state. Our results provide useful insight into the optoelectronic properties of these kinds of molecules.

关键词： Transient absorption spectroscopy Ultrafast dynamics Temperature-dependent Polarity-dependent Intramolecular charge transfer state

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Probing the intrinsic catalytic activity of carbon nanotubes for the metal-free oxidation of aromatic thiophene compounds in ionic liquids

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Journal of Energy Chemistry 2019年第5期28卷 131-137页

作者： Qingqing Gu Yuxiao Ding Zigeng Liu Yangming Lin Robert Schlogl Saskia Heumann Dangsheng Su Shenyang National Laboratory for Material Science Institute of Metal ResearchChinese Academy of SciencesWenhua Road 72Shenyang 110016LiaoningChina University of chinese Academy of Sciences Beijing 100049China Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34-3645470 Millheim a.d.RuhrGermany Fritz Haber Institute of the Max Planck Society Faradayweg 4-614195 BerlinGermany

A metal-free catalytic system combining oxidized carbon nanotubes (oCNTs) and ionic liquids (ILs) is presented for the oxidation of aromatic thiophene compounds with H2O2 as an oxidant. The oCNTs exhibit impressively high activity and stability in the system, which show an even better performance than those of some reported metal catalysts. The ILs are proved to have indispensable influence on the enhanced catalytic performance of the oCNTs. Detailed characterization by TG-MS and XPS demonstrates that the carbonyl groups are the active sites for the oxidation process, which is further supported by the deactivation and the model catalysts experiments. The quantitative analysis of different oxygen groups in oCNTs could be achieved by an isothermal temperature programmed TG-MS method. The concentration of carbonyl groups is 1.46 mmol per 1 g oCNTs and the tuiriover frequency of oCNTs could also be obtained (10.7 h^-1 in the presence of OmimPF6). H2O2 decomposition experiments combined with the EPR results reveal that the presence of OmimPF6 can avoid the intermediate HO· to form O2 and then improve the catalytic performance of oCNTs for the oxidation of dibenzothiophene.

关键词： Carbon nanotubes Metal-free catalysis Oxidative desulfurization Ionic liquids

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The role of recrystallization and grain growth in optimizing the sheet texture of magnesium alloys with calcium addition during annealing

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Journal of Magnesium and Alloys 2020年第1期8卷 252-268页

作者： Fei Guo Risheng Pei Luyao Jiang Dingfei Zhang Sandra Korte-Kerzel Talal Al-Samman College of Materials Science and Engineering Chongqing University of Technology400054 ChongqingChina Chongqing Key Laboratory of Mold Technology Chongqing University of Technology400054 ChongqingChina Institut für Metallkunde und Metallphysik RWTH Aachen University52056 AachenGermany College of Materials Science and Engineering Chongqing University400044 ChongqingChina

The contribution of recrystallization and grain growth to the texture evolution in AZ31 alloy and a modified version AZ31+0.5 wt.%Ca was investigated utilizing a multi-step annealing *** results showed that the addition of Ca triggered a considerable texture modification by increasing the texture spread and decreasing the overall texture *** effect was found to be temperature *** the annealing temperature remained lower than 450℃,a weak double peak texture with large basal pole tilt towards the RD was *** is correlated to microstructure observations of a large number of Ca-containing nano-sized particles that seemed to suppress grain growth below 450℃,which stabilized the weak recrystallization *** favorable texture was lost upon annealing at higher *** AZ31,recrystallization nuclei were found to preserve the orientation of their deformed parents,which offered limited potential to optimize the texture via annealing *** growth of recrystallized grains resulted in a distinct sheet texture transition from a double-peak to a single-peak basal *** of grain boundary energy and grain topology are discussed to explain the growth advantage of the sharp basal component over other orientations.

关键词： Magnesium alloys Microstructure Texture Recrystallization Grain growth

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