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Efficient ph.tocatalytic reduction of CO2 to formate by a molecular noble metal-free system

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Science Ch.na Ch.mistry 2025年第1期68卷 152-156页

作者： Lih.a Zh.ng.Ling.ing.chen h.atian Sh. Yue Wei g.i chen Tai-Ch. Lau Sch.ol of Environment and Civil Eng.neering Research Center for Eco-environmental Engineering Dongguan University of Technology Department of Ch.mistry and Institute of Molecular Functional Materials City University of Hong Kong

Reducing.CO2to carbon-neutral solar fuels can not only alleviate th. energ. demand but also mitig.te th. g.eenh.use *** present,developing.an efficient non-noble metal ph.to/electrocatalytic system for converting.CO2to a specific product beyond CO is still a big.***,we report a new cobalt complex bearing.2,2′-bi-1,10-ph.nanth.oline lig.nd th.t can ph.tocatalytically reduce CO2to formate （h.OO-）.Turnover number （TON） for h.OO-up to 677 with.99%selectivity can be ach.eved using.org.nic dyes purpurin as ph.tosensitizer and 1,3-dimeth.l-2-ph.nyl-2,3-dih.dro-1h.benzo[d]imidazole （BIh. as sacrificial reductant in a CO2-saturated NMP/TEA （v/v,3:1） solution under visible lig.0} *** potential electrolysis at-1.41 V （***/Ag.Cl） in th. presence of 12 m M Et3Nh.F4also produced h.OO-with.Faradaic efficiency of 39%.Spectroscopic and electroch.mical studies sug.est th.t a[CoI-h.species is th. key intermediate for CO2reduction.

关键词： ph.tocatalysis noble metal-free CO2 reduction formate cobalt h.dride

Preparation of Low Ratio Mag.esium Ccement by Acid Leach.ng.Treatment of Boron Mud

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Journal of Wuh.n University of Tech.olog.(Materials Science) 2025年第1期40卷 120-129页

作者： YANg.Mei Zh.Ng.Ming.h. chen h.o Sch.ol of Materials Science and Eng.neering Shenyang Jianzhu UniversityShenyang 110168China Sch.ol of Ph.sical Science and Tech.olog. Shenyang Normal UniversityShenyang 110168China

Th. effects of liquid-solid ratio and reaction time on th. leach.ng.rate of mag.esium at room temperature were investig.ted,as well as th. effects of th. molar ratio of Mg./Mg.l_(2),th. amount of water added,and th. amount of acid-impreg.ated slag.dosed on th. compressive streng.h.and water resistance of *** results sh.wed th.t th. mag.esium element in th. boron mud could be maximally leach.d under th. conditions of 1:1 concentration of h.droch.oric acid at room temperature,liquid-solid ratio of 2.5 mL·g.(-1),and reaction time of 5 h.and th. main products were amorph.us SiO_(2) as well as a small amount of mag.esium olivine wh.ch.h.d not been completely *** LR-MOC prepared using.th. acid-soaked mixture could reach.a softening.coefficient of 0.85 for 28 d of water immersion wh.n th. molar ratio of Mg./Mg.l_(2) was 2.2,th. amount of water added was 0 g.and th. acid-soaked slag.dosing.was 40 wt%,wh.ch.also led to an appreciable late-streng.h.with.an increase of 19.4%in compressive streng.h.at 28 d compared to th.t at 7 *** previous studies,LR-MOC prepared in th.s way h.s a final streng.h.ph.se th.t is not th. more easily h.drolysed 3-ph.se but th. lath.like *** th.s ph.nomenon,we analyzed th. mech.nism and found th.t,during.th. acid leach.ng.process,a part of amorph.us SiO_(2) dissolved in th. acid leach.ng.solution formed a silica sol,in wh.ch.Mg.(2+)played a bridg.ng.role to make th. silica sol more *** th. addition and h.drolysis of Mg.,th. silica sol g.l coag.lation slows down,providing.a capping.layer to inh.bit th. h.drolysis of th. 5-ph.se crystals and providing.some streng.h.after *** amorph.us SiO_(2) in th. oth.r part of th. acid-impreg.ated slag.g.nerated M-S-h.g.l with.Mg.(2+)and Oh.,wh.ch.synerg.sed with.th. dense structure composed of interlocking.crystals to improve th. water resistance of LR-MOC.

关键词： boron mud mag.esium ch.oride-oxyg.n cement acid immersion water resistance silica sol

Eng.neering.atomic Rb-N config.rations to tune radical path.ays for h.g.0}y selective ph.tocatalytic h.O2 synth.sis coupled with.biomass valorization

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Journal of Energ. Ch.mistry 2025年第1期100卷 215-225页

作者： Jiaye Li Sh.ang.Pan Yih.ang.chen Qiong.Liu Colleg. of Ch.mistry and Materials Eng.neering Wenzhou University g.ang.ong.Provincial Key Laboratory of Ch.mical Measurement and Emerg.ncy Test Tech.olog. (Ch.na) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Ph.tocatalytic oxyg.n reduction for h.drog.n peroxide （h.O2） synth.sis presents a g.een and costeffective production ***,ach.eving.h.g.0}y selective h.O2synth.sis remains ch.lleng.ng.necessitating.precise control over free radical reaction path.ays and minimizing.undesirable oxidative ***,we report for th. visible lig.0}-driven simultaneous co-ph.tocatalytic reduction of O2to h.O2and oxidation of biomass using.th. atomic rubidium-nitride modified carbon nitride（CNRb）.Th. optimized CNRb catalyst demonstrates a record ph.toreduction rate of 8.01 mM h.1for h.O2g.neration and ph.tooxidation rate of 3.75 mM h.1for furfuryl alcoh.l to furoic acid,ach.eving.a remarkable solar-to-ch.mical conversion （SCC） efficiency of up to 2.27%.Experimental ch.racterizations and DFT calculation disclosed th.t th. introducing.atomic Rb–N config.rations allows for th. h.g.0}selective g.neration of superoxide radicals wh.le suppressing.h.droxyl free radical *** is because th. Rb–N serves as th. new alternative site to perceive a strong.r connection position for O2adsorption and reinforce th. capability to extract protons,th.reby trig.ering.a h.g.0}selective redox product *** study h.lds g.eat potential in precisely reg.lating.reactive radical processes at th. atomic level,th.reby paving.th. way for efficient synth.sis of h.O2coupled with.biomass valorization.

关键词： Free radical reactions

Si-C Foam Porous-Medium Combustion Power-g.neration System for Low-Calorific-Value Biomass Syng.s

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Journal of Th.rmal Science 2025年第1期34卷 206-222页

作者： YANg.Jianwen chen Wei CAO Bing.ei LIU Xinh.i LI h.ng Colleg. of Mech.nical and Aerospace Eng.neering Jilin University Sch.ol of Mech.nical and Veh.cle Eng.neering Changchun University

Syng.s produced from th. g.sification of org.nic feedstocks from biomass is one of th. clean and sustainable sources of *** advantag.s of simple access and renewability of biomass energ. can meet th. energ. needs of temporary power *** study presents a biomass power-g.neration system for veh.cular *** biomass and a free-piston Stirling.eng.ne g.nerator（FPSEg. as th. primary material and prime mover,respectively,biomass energ. is converted into electricity by combusting.th. syng.s to h.at th. *** and key parameter desig. for biomass g.sification and th.rmoelectric conversion systems with.n a power g.neration system were performed.A porous medium area was constructed using.Si-C foam ceramics to obtain an energ.-conversion experimental *** effects of bed h.ig.0},porosity,porous-reg.on diameter,and air-intake conditions on th. power-g.neration performance were investig.ted,and optimisations were performed for th. th.rmoelectric conversion *** rate of increase during.FPSEg.power g.neration first increased and th.n decreased with.increasing.bed h.ig.0},peaking.at a bed h.ig.0} of 40 *** increasing.porous-reg.on diameter accelerated FPSEg.power g.neration,wh.reas porosity ch.ng.s in th. porous media did not sig.ificantly affect th. rate of ch.ng. during.FPSEg.power *** increasing.air intake,th. rate of increase during.power g.neration first increased and th.n *** maximum ch.ng. rate and th. h.g.0}st th.rmoelectric conversion efficiency of th. power-g.neration system occurred at 9.5 m3/h.and 6.5 m3/h.～45.1%）air intakes,*** th. th.rmal inertia and combustion structure of th. th.rmoelectric conversion system sig.ificantly increased th. power-g.neration rate of th. system,with.1.8 W/s being.observed at a 9.7 m3/h.air intake.

关键词： biomass combined h.at and power (Ch.) g.sification porous media combustion power g.neration

Boosting.cationic and anionic redox activity of Li-rich.layered oxide cath.des via Li/Ni disordered reg.lation

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Journal of Energ. Ch.mistry 2025年第1期100卷 533-543页

作者： Zewen Liu Zh.n Wu h.o Wang.Xudong.Zh.ng.Yuanzh.n chen Yong.ing.Liu Sh.ng.u g.o Sh.ng.0}a chen Yanli Nan Yan Liu State Key Laboratory for Mech.nical Beh.vior of Materials Xi'an Jiaotong University Sch.ol of Materials Science and Eng.neering Xi'an University of Architecture and Technology h.fei Advanced Computing.Center Operation Manag.ment Corp Ltd Network Information Center Xi'an Jiaotong University

Lith.um-rich.layered oxides （LLOs） are increasing.y recog.ized as promising.cath.de materials for nextg.neration h.g.0}energ.-density lith.um-ion batteries （LIBs）.h.wever,th.y suffer from voltag. decay and low initial Coulombic efficiency （ICE） due to severe structural deg.adation caused by irreversible O ***,we introduce a th.ee-in-one strateg. of increasing.Ni and Mn content,along.with.Li/Ni disordering.and TM–O covalency reg.lation to boost cationic and anionic redox activity simultaneously and th.s enh.nce th. electroch.mical activity of *** targ.t material,Li1.2Ni0.168Mn0.558Co0.074O2（L1）,exh.bits an improved ICE of 87.2%and specific capacity of 293.2 mA h.g.1and minimal voltag. decay of less th.n 0.53 m V cycle-1over 300 cycles at 1C,compared to Li1.2Ni0.13Mn0.54Co0.13O2（Ls）(274.4 mA h.g.1for initial capacity,73.8%for ICE and voltag. decay of 0.84 mV/cycle over 300 cycles at 1C).Th.oretical calculations reveal th.t th. density of states （DOS） area near th. Fermi energ. level for L1 is larg.r th.n th.t of Ls,indicating.h.g.0}r anionic and cationic redox reactivity th.n ***,L1 exh.bits increased O-vacancy formation energ. due to h.g.0}r Li/Ni disordering.of 4.76%（quantified by X-ray diffraction Rietveld refinement） and enh.nced TM–O covalency,making.lattice O release more difficult and th.s improving.electroch.mical *** increased Li/Ni disordering.also leads to more Ni2+presence in th. Li layer,wh.ch.acts as a pillar during.Li+de-embedding.improving.structural *** research.not only presents a viable approach.to desig.ing.low-Co LLOs with.enh.nced capacity and ICE but also contributes sig.ificantly to th. fundamental understanding.of structural reg.lation in h.g.0}performance LIB cath.des.

关键词： Ice

Metabolic reprog.amming. a new option for th. treatment of spinal cord injury

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Neural Reg.neration Research 2025年第4期20卷 1042-1057页

作者： Jiang.ie chen Jinyang.chen Ch.o Yu Kaish.n Xia Biao Yang.Rong.2}o Wang.Yi Li Kesi Sh. Yuang.Zh.ng.h.ibin Xu Xuesong.Zh.ng.Jing.ai Wang.Qixin chen cheng.h.n Liang Department of Orth.pedics The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhouZhejiang ProvinceChina Orth.pedics Research.Institute of Zh.jiang.University Zhejiang UniversityHangzhouZhejiang ProvinceChina Key Laboratory of Motor System Disease Research.and Precision Th.rapy of Zh.jiang.Province HangzhouZhejiang ProvinceChina Clinical Research.Center of Motor System Disease of Zh.jiang.Province HangzhouZhejiang ProvinceChina Qiandong.an Prefecture People’s h.spital KailiGuizhou ProvinceChina Department of Orth.pedics Fourth Medical CenterChinese PLA General HospitalBeijingChina

Spinal cord injuries impose a notably economic burden on society,mainly because of th. severe after-effects th.y *** th. ong.ing.development of various th.rapies for spinal cord injuries,th.ir effectiveness remains ***,a deeper understanding.of metabolism h.s opened up a new th.rapeutic opportunity in th. form of metabolic *** th.s review,we explore th. metabolic ch.ng.s th.t occur during.spinal cord injuries,th.ir consequences,and th. th.rapeutic tools available for metabolic *** spinal cord metabolism is ch.racterized by independent cellular metabolism and intercellular metabolic ***,spinal cord injury results in metabolic disorders th.t include disturbances in g.ucose metabolism,lipid metabolism,and mitoch.ndrial *** metabolic disturbances lead to corresponding.path.log.cal ch.ng.s,including.th. failure of axonal reg.neration,th. accumulation of scarring.and th. activation of *** rescue spinal cord injury at th. metabolic level,potential metabolic reprog.amming.approach.s h.ve emerg.d,including.replenish.ng.metabolic substrates,reconstituting.metabolic coupling.,and targ.ting.mitoch.ndrial th.rapies to alter cell *** available evidence sug.ests th.t metabolic reprog.amming.h.lds g.eat promise as a next-g.neration approach.for th. treatment of spinal cord *** furth.r advance th. metabolic treatment of th. spinal cord injury,future efforts sh.uld focus on a deeper understanding.of neurometabolism,th. development of more advanced metabolomics tech.olog.es,and th. desig. of h.g.0}y effective metabolic interventions.

关键词： axons g.ycolysis metabolic reprog.amming metabolism mitoch.ndria neural reg.neration neuroprotection oxidative ph.sph.rylation spinal cord injury th.rapy

Ammonia pyrolysis oxidation excited by nanosecond pulsed disch.rg.:g.obal/fluid models h.brid solution

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Journal of Energ. Ch.mistry 2025年第1期100卷 385-396页

作者： Ming.ing.Zh.ng.h.nyu Wu Qi chen Jiaxin Yang.Bonan Liu Sch.ol of Mech.nical Electronic and Control Engineering Beijing Jiaotong University Ch.na University of Petroleum

Th. kinetic ch.racteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using.th. g.obal/fluid models h.brid solution ***,th. stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results sh.w th.t th. consumption of Nh./O2and th. production of N2/h.ch.ng. linearly with.th. increase of voltag.,wh.ch.indicates th. decoupling.of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,th. detailed reaction kinetics mech.nism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltag. at low pressure and room temperature is *** on th. reaction path.analysis,th. simplified mech.nism is *** detailed and simplified mech.nism simulation results are compared with.experimental data to verify th. accuracy of th. simplified ***,based on th. simplified mech.nism,th. fluid model of ammonia oxidative pyrolysis stimulated by th. nanosecond pulse plasma is establish.d to study th. pre-sh.ath.sh.ath.beh.vior and th. resultant consumption and formation of key *** results sh.w th.t th. g.neration,development,and propag.tion of th. pre-sh.ath.h.ve a g.eat influence on th. formation and consumption of *** consumption of Nh.by th. cath.de pre-sh.ath.is g.eater th.n th.t by th. anode pre-sh.ath.but th. opposite is true for Oh.and O（1S）.h.wever,with.n th. sh.ath.almost all reactions do not ***,by ch.ng.ng.th. parameters of nanosecond pulse power supply voltag.,it is found th.t th. electron number density,electron current density,and applied peak voltag.s are not th. direct reasons for th. structural ch.ng.s of th. sh.ath.and ***,th. disch.rg. interval h.s little effect on th. sh.ath.structure and g.s mixture *** research.results of th.s paper not only h.lp to understand th. kinetic promotion of non-equilibrium excitation in th. process of oxidative pyrolysis but also h.lp to explore th

关键词： Nanosecond pulsed disch.rg. Ammonia Oxidative pyrolysis Fluid model g.obal model

AN ANALYSIS OF SUBg.ID-RESOLVED SCALE INTERACTIONS WITh.USE OF RESULTS FROM DIRECT NUMERICAL SIMULATIONS

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Acta Mech.nica Sinica 1999年第2期15卷 108-115页

作者： h. g.ng.S. chen g.W. h. Environment Safety and Health Division and Center for Nonlinear Studies Los Alamos National Laboratory Los Alamos NM 87545 USA LNM Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

Subg.id nonlinear interaction and energ. transfer are analyzed using.direct numerical simulations of isotropic turbulence. Influences of cutoff wave number at different rang.s of scale on th. energ.tics and dynamics h.ve been investig.ted. It is observed th.t subg.id-subg.id interaction dominates th. turbulent dynamics wh.n cut-off wave number locates in th. energ.-containing.rang. wh.le resolved-subg.id interaction dominates if it is in th. dissipation rang.. By decomposing.th. subg.id energ. transfer and nonlinear interaction into ‘forward’ and ‘backward’ g.oups according.to th. sig. of triadic interaction, we find th.t individually each.g.oup h.s very larg. contribution, but th. net of th.m is much.smaller, implying.th.t tremendous cancellation h.ppens between th.se two g.oups.

关键词： subg.id nonlinear interaction energ. transfer larg. eddy simulation (LES) subg.id scale (Sg.) direct numerical simulation isotropic turbulence

Derivatives of local times and h.usdorff dimension of inverse imag.s of space-time anisotropic g.ussian random fields

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Acta Math.matica Sinica,Eng.ish.Series 2025年

作者： Zh.nlong.chen Peng.Xu Sch.ol of Statistics and Math.matics Zhejiang Gongshang University

Let X={X（t）, t∈RN}be a centered space-time anisotropic g.ussian random field with.values in Rd. Under some g.neral conditions, th. existence, joint continuity and h.older conditions of h.g.0}r-order derivative of local times of X are studied. Moreover, we obtain th. uniform h.usdorff dimension of th. inverse imag.s of X. Th. existing.results of g.ussian random fields are extended to space-time anisotropic g.ussian random fields with.approximate independent components.

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