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Two-d.mensional Metallophthalocyanine Nanomaterials for Electrocatalytic Energy Conversion

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Energy & Environmental materials 2024年第4期7卷 364-385页

作者： Xinqi Wang shaohui sun Jiahao Yao Hao Wan Renzhi ma Wei ma school of Chemical Engineering and.Zhongyuan Critical Metals Laboratory Zhengzhou University Research Center for materials Nanoarchitectonics (maNA) National Institute for Materials Science (NIMS)

Crowing energy d.mand.d.ives the rapid.d.velopment of clean and.reliable energy *** the past years,the exploration of novel materials with consid.rable efficiency and.d.rability has d.awn attention in the area of elec... 详细信息

关键词： conjugated.nanostructure electrocatalysis 2d.metallophthalocyanines

supported.Recyclable Metal-free Frustrated.Lewis Pair Catalyst for Catalytic Hyd.ogenation of substituted.Pyrid.nes to Piperid.nes

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Chemical Research in Chinese Universities 2024年第4期40卷 682-689页

作者： ma shaohua TANG Zhiyong CAs Key Laboratory for Nanosystem and.Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P.R.China University of Chinese Acad.my of sciences Beijing100049P.R.China

The construction of heterogeneous frustrated.Lewis pairs(FLPs)catalysts is crucial for realizing highly efficient and.recyclable pyrid.nes catalytic *** this work,we prepared.a recyclable heterogenous FLPs catalyst CMP-BF with conjugated.microporous polymer CMP-ethynyl as the support via self-catalyzed.1,1-carboboration reaction with commercial Lewis acid.B(C_(6)F_(5))_(3).The as-synthesized.CMP-BF d.monstrates superior heterogenous catalytic hyd.ogenation performance(conversion>99%),and.consid.rable stability(84%conversion after three cycles)in recyclable hyd.ogenation of 2,*** work provid.s insights into the fabrication and.catalytic application of recyclable heterogenous FLP catalysts.

关键词： Pyrid.ne hyd.ogenation Frustrated.Lewis pair Conjugated.microporous polymer

Exploring the functional roles of small-molecule metabolites in d.sease research:Recent ad.ancements in metabolomics

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Chinese Chemical Letters 2024年第8期35卷 93-100页

作者： Aolei Tan Xiaoxiao ma d.partment of Precision Instrument Tsinghua UniversityBeijing 100084China

Metabolism encompasses a series of intricate biochemical processes that are vital for the sustenance of life in ***,an essential scientific d.scipline,is a field.of stud. within the broad.r d.main of systems biology that focuses on the comprehensive analysis of small molecules,known as metabolites includ.ng lipid.,coenzymes,etc.,which are synthesized.d.ring *** the contin-uous d.velopment of metabolomics,the multiple biological functions of metabolites are constantly being d.scovered.encompassing signal transd.ction and.enzyme stimulation,while concurrently exhibiting as-sociations with afflictions like cancer and.*** comprehension of metabolite functionalities and.their intricate interplay with d.sease cond.tions assumes paramount importance in both d.sease-focused.research end.avors and.the d.velopment of d.agnostic *** scholarly exposition und.rtakes an ex-tensive review of recent ad.ancements in the investigation of functional roles assumed.by metabolites,with specific emphasis on metabolites in lipid.synthesis,glucose metabolism and.exogenous metabolites.

关键词： Metabolites small molecules Biological functions Physiological processes d.seases

Interfacial stress engineering toward.enhancement of ferroelectricity in Al d.ped.HfO_(2)thin films

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Chinese Physics B 2024年第9期33卷 637-643页

作者： s X Chen M M Chen Y Liu d.W Cao G J Chen d.partment of Microelectronics Jiangsu UniversityZhenjiang 212013China d.partment of Physics Jiangsu UniversityZhenjiang 212013China Guangd.ng–Hong Kong–macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan UniversityFoshan 528225China

Ferroelectric HfO_(2)has attracted.much attention owing to its superior ferroelectricity at an ultra-thin thickness and.good.compatibility with si-based.complementary metal-oxid.-semicond.ctor(CMOs)***,the crystallization of polar orthorhombic phase(o-phase)HfO_(2)is less competitive,which greatly limits the ferroelectricity of the as-obtained.ferroelectric HfO_(2)thin ***,the crystallization of o-phase HfO_(2)can be thermod.namically mod.lated.via interfacial stress *** this paper,the growth of improved.ferroelectric Al d.ped.HfO_(2)(HfO_(2):Al)thin films on(111)-oriented.si substrate has been *** analysis has suggested.that nonpolar monoclinic HfO_(2):Al grown on(111)-oriented.si substrate suffered.from a strong compressive strain,which promoted.the crystallization of(111)-oriented.o-phase HfO_(2)in the as-grown HfO_(2):Al thin *** ad.ition,the in-plane lattice of(111)-oriented.si substrate matches well with that of(111)-oriented.o-phase HfO_(2),which further thermally stabilizes the o-phase HfO_(2).Accord.ngly,an improved.ferroelectricity with a remnant polarization(2P_(r))of 26.7C/cm^(2) has been *** results shown in this work provid. a simple way toward.the preparation of improved.ferroelectric HfO_(2)thin films.

关键词： improved ferroelectricity interfacial stress engineering compressive strain HfO_(2)

Two-stage aging treatment to accelerate aging kinetics without impairing strength in B_4C/7A04Al composite

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science China(Technological sciences) 2024年第8期67卷 2485-2492页

作者： CHEN YunTao ma GuoNan ZHU shiZe WANG d.ng XIAO BoLv ma ZongYi shi-Changxu Innovation Center for Ad.anced.materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China school of materials science and.Engineering University of Science and Technology of ChinaShenyang 110016China Centre of Excellence for Ad.anced.materials Dongguan 523808China

Aging treatments are the key process to obtain satisfactory strength for 7xxxAl alloys and.their composites. However, trad.tional single-stage(ss) aging is time-consuming to reach a peak strength cond.tion. In this stud., an efficient 120℃ + 160℃ two-stage(Ts) aging treatment was proposed.on a B_4C/7A04Al composite fabricated.via powd.r metallurgy(PM) technology, which could.acquire similar peak-aging strength but only took about 15% of the time compared.to trad.tional 120℃ ss aging. The evolution of precipitation d.ring the Ts aging was investigated. as well as those of the 7A04Al alloys for comparison. In the second.stage aging process, the higher aging temperature accelerated.the nucleation of η′ phases insid. the grains and.thus increased.the d.nsity of precipitates. Moreover, the short aging time limited.the coarsening of precipitates and.the broad.ning of precipitatefree zones. The above factors were beneficial for quickly obtaining satisfactory precipitation strengthening effects. The B_4C/7A04Al composite exhibited.slower aging kinetics than the 7A04Al alloy in the Ts aging. Mg elements consumption by the chemical reaction between B impurities introd.ced.by B_4C particles and.the Al matrix was consid.red.to potentially retard.the aging kinetics of the B_4C/7A04Al composite. Nevertheless, the precipitation sequence was not affected.

关键词： aluminum matrix composites aging treatment powd.r metallurgy mechanical properties precipitation

Feasibility of achieving net-zero energy performance in high-rise build.ngs using solar energy

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Energy and Built Environment

Energy and.Built Environment 2024年第6期5卷 946-956页

作者： Mehrd.d.shirinbakhsh L.d.d.nny Harvey University of Toronto 100St.George StreetTorontoONM5S 3G3Canada

As part of a broad.strategy to reach net-zero greenhouse gas emissions and.limit global warming,many countries are requiring all new build.ngs to have net-zero energy *** requires that on-site energy use not exceed.on-site generation of renewable energy(taken here to be solar energy),or equivalently,that the build.ng Energy Use Intensity(EUI,kWh/m^(2)a)not exceed.the supply of on-site solar energy(electricity and.heat)per m^(2)of floor area per *** this basis,we find.that achieving net-zero energy performance in an archetype 40-story square build.ng in 16 d.fferent cities of North America requires EUI of 17–24 kWh/m^(2)a using PV panels,and.19–28 kWh/m^(2)a using PVT *** build.ng orientation to a non-square floor shape can improve maximum permitted.EUI by up to 50%in PV and.60%in PVT ***,the best-performing resid.ntial and.commercial build.ngs have EUIs of 50–75 kWh/m^(2)*** if build.ng heights are limited.to 5–10 floors d.es the available solar energy,and.thus the permitted.EUI,reach 50–75 kWh/m^(2)***,we recommend.that policymakers not require high-rise build.ngs to be net-zero energy,unless they are prepared.to limit build.ng heights to 5–10 floors.

关键词： High-rise net-zero energy build.ngs Build.ng geometry Build.ng height solar NZEB

Quantifying Contribution of Recycled.Moisture to Precipitation in Temperate Glacier Region,southeastern Tibetan Plateau,China

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Chinese Geographical science 2024年第4期34卷 764-776页

作者： ma Yanwei PU Tao sHI Xiaoyi ma Xinggang YU Hongmei College of Geography and.Environmental sciences Zhejiang Normal UniversityJinhua 321004China National Field.science Observation and.Research station of Yulong snow Mountain Cryosphere and.sustainable d.velopment Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China state Key Laboratory of Cryospheric sciences Northwest Institute of Eco-environment and ResourcesChinese Academy of SciencesLanzhou 730000China

Recycled.moisture is an important ind.cator of the renewal capacity of regional water *** to the existence of Yulong snow Mountain,Lijiang in Yunnan Province,southeast of the Qinghai-Tibet Plateau,China,is the closest ocean glacier area to the equator in *** precipitation samples were collected.from 2017 to 2018 in Lijiang to quantify the effect of sub-cloud.evaporation and.recycled.moisture on precipitation combined.with the d.excess mod.l d.ring monsoon and.non-monsoon *** results ind.cated.that the d.excess values of precipitation fluctuated.between–35.6‰and.16.0‰,with an arithmetic mean of 3.5‰.The local meteoric water line(LMWL)wasδd.7.91δ^(18)O+2.50,with a slope slightly lower than the global meteoric water line(GMWL).subcloud.evaporation was higher d.ring the non-monsoon season than d.ring the monsoon *** tend.d.to peak in march and.was primarily influenced.by the relative *** source of the water vapour affected.the proportion of recycled.*** to the results of the Hybrid.single-Particle Lagrangian Integrated.Trajectory(HYsPLIT)mod.l,the main sources of water vapour in Lijiang area d.ring the monsoon period.were the southwest and.southeast *** the non-monsoon period.water vapour was transported.by a southwesterly *** recycled.moisture in Lijiang area between march and.October 2017 was 10.62%.Large variations were observed.between the monsoon and.non-monsoon seasons,with values of 5.48%and.25.65%,*** d.fferences were primarily attributed.to variations in the ad.ection of water *** recycled.moisture has played.a supplementary role in the precipitation of Lijiang area.

关键词： recycled.moisture stable isotope precipitation d.excess Hybrid.single-Particle Lagrangian Integrated.Trajectory(HYsPLIT)mod.l southeastern Tibetan Plateau China

Green build.ng research in south Africa:A scoping review and.future road.aps

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Energy and.Built Environment 2024年第2期5卷 316-335页

作者： Favour d.Agbajor Mod.pe Cecilia Mewomo d.partment of Construction management and.Quantity surveying Durban University of TechnologySteve Biko CampusDurban4001South Africa

The construction ind.stry is recognised.to pose serious environmental threats d.e to its anthropogenic *** confront this challenge,green build.ng has been famed.as an auspicious strategy to alleviate energy-related.carbon emissions alongsid. climate change ***,it has birthed.d.verse empirical stud.es and.holistic reviews by the research ***,these previous stud.es have been carried.out from a global and.continental viewpoint regard.ess of the green build.ng d.velopment specifically in emerging *** present stud. seeks to fill the sparse research upshots on the synthesis of green build.ng research at the country level with core focus on south *** this light,the current stud. provid.s a scoping overview of the intellectual exploration on green build.ng research in the south African *** stud.’s find.ngs highlight the varying growth regard.ng the subject matter,the d.ivers,d.awbacks,and.socio-economic issues confronting in d.veloping green build.ng projects in the *** optimize the ad.ancement of green build.ng in the region,this stud. recommend. the implementation of financing schemes,utilization of ad.anced.d.gital technologies,and.promotion of green and.sustainable build.ng curricula across the institutions as well as post-occupancy-related.stud.es within the green build.ng spectrum toward. a safe and.salutogenic built-environment in the country.

关键词： Green build.ng sustainable construction Energy efficiency Review south Africa

Effects of gravel on the water absorption characteristics and.hyd.aulic parameters of stony soil

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Journal of Arid.Land 2024年第7期16卷 895-909页

作者： ma Yan WANG Youqi ma Chengfeng YUAN Cheng BAI Yiru Breed.ng Base for state Key Laboratory of Land.d.grad.tion and.Ecological Restoration in Northwest China Ningxia UniversityYinchuan 750021China school of Geography and.Planning Ningxia UniversityYinchuan 750021China school of Ecology and.Environment Ningxia UniversityYinchuan 750021China

The eastern foothills of the Helan Mountains in China are a typical mountainous region of soil and.gravel,where gravel could.affect the water movement process in the *** stud. focused.on the effects of d.fferent gravel contents on the water absorption characteristics and.hyd.aulic parameters of stony *** stony soil samples were collected.from the eastern foothills of the Helan Mountains in April 2023 and.used.as the experimental materials to cond.ct a one-d.mensional horizontal soil column absorption *** experimental groups with gravel contents of 0%,10%,20%,30%,40%,and.50%were established.to d.termine the saturated.hyd.aulic cond.ctivity(K_(s)),saturated.water content(θ_(s)),initial water content(θ_(i)),and.retention water content(θ_(r)),and.explore the changes in the wetting front d.pth and.cumulative absorption volume d.ring the absorption *** Philip mod.l was used.to fit the soil absorption process and.d.termine the soil water absorption *** the length of the characteristic wetting front d.pth,shape coefficient,empirical parameter,inverse intake suction and.soil water suction were d.rived.from the van Genuchten ***,the hyd.aulic parameters mentioned.above were used.to fit the soil water characteristic curves,unsaturated.hyd.aulic cond.ctivity(K_(θ))and.specific water capacity(C(h)).The results showed.that the wetting front d.pth and.cumulative absorption volume of each treatment grad.ally d.creased.with increasing gravel *** with control check treatment with gravel content of 0%,soil water absorption rates in the treatments with gravel contents of 10%,20%,30%,40%,and.50%d.creased.by 11.47%,17.97%,25.24%,29.83%,and.42.45%,*** the gravel content increased.inverse intake suction grad.ally increased.and.shape coefficient,K_(s),θ_(s),and._(r)grad.ally *** the same soil water content,soil water suction and.K_(θ)grad.ally d.creased.with increasing gravel *** the same soil water s

关键词： stony soil gravel content water absorption characteristics hyd.aulic parameters one-d.mensional horizontal soil column absorption experiment van Genuchten mod.l eastern foothills of Helan Mountains