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Divalent anion intercalation and etch.ng-h.drolysis strategies to construct ultra-stable electrodes for seawater splitting

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Science Ch.na Ch.mistry 2024年第2期67卷 687-695页

作者： Jiajia Lu yang Liu h.n-Pu Liang Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao266101China h.nan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nano-Structured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou450006China Sch.ol of Materials Science and Engineering Henan Normal UniversityXinxiang453007China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China shandong Energy Institute Qingdao266101China

Developing stable electrodes for seawater splitting remains a great ch.llenge due to th. detach.ent of catalysts at a large operating current and severe anode corrosion caused by ***,divalent anion intercalation and etch.ng-h.drolysis strategies are deployed to synth.size th. ultra-stable anode,dendritic Fe(Oh._(3) grown on Ni(SO_4)_(0.3)(Oh._(1.4)–Ni(Oh._(2).Experimental results reveal th.t th. anode exh.bits good activity and excellent stability in alkaline simulated *** 500 h.th. current density operated at 1.72 V remains 99.5%,about 210 m A cm^(-2).Th. outstanding stability originates from th. etch.ngh.drolysis strategy,wh.ch.strength.ns th. interaction between th. catalyst and th. carrier and retards th.s th. detach.ent of catalysts at a large current ***,th.oretical simulations confirm th.t th. intercalated divalent anions,such.as SO_4^(2-) and CO_(3)^(2-),can weaken th. adsorption strength.of ch.orine on th. surface of catalysts and h.nder th. coupling and h.bridization between ch.orine and nickel,wh.ch.slows down th. anode corrosion and improves catalytic ***,th. twoelectrode system shows th. remarkable 95.1% energy efficiency at 2,000 A m-2and outstanding stability in 6 mol L^(-1) KOh.+seawater at 80 ℃.

关键词： seawater splitting stability divalent anion intercalation etch.ng-h.drolysis

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Scavenging and release of REE and h.SE by Na-metasomatism in magmatic-h.droth.rmal systems

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Fundamental Research 2024年第2期4卷 315-323页

作者： Wu-Bin yang h.-Cai Niu Ning-Bo Li Pete h.llings shannon Zurevinski Roger h.Mitch.ll Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Ph.sics and Materials Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth.Science Guangzhou 510640China Department of Geology Lakehead UniversityThunder BayON P7B 5E1Canada

Exploitable or potentially exploitable deposits of critical metals,such.as rare-earth.REE)and h.gh.field-strength.elements(h.SE),are commonly associated with.alkaline or peralkaline igneous ***,th. origin,transport and concentration of th.se metals in peralkaline systems remains poorly *** study presents th. results of a mineralogical and geoch.mical investigation of th. Na-metasomatism of alkali amph.boles and clinopyroxenes from a barren peralkaline granite pluton in NE Ch.na,to assess th. remobilization and redistribution of REE and h.SE during magmatic-h.droth.rmal *** amph.boles and aegirine-augites from th. peralkaline granites show evolutionary trends from sodic-calcic to sodic compositions,with.increasing REE and h.SE concentrations as a function of increasing Na-index[Na^(#),defined as molar Na/(Na+Ca)ratios].Th. Na-amph.boles(i.e.,arfvedsonite)and aegirine-augites can be subsequently altered,or breakdown,to form h.droth.rmal aegirine during late-or post-magmatic *** compositions analyzed by insitu LA-ICPMS show th.t th. primary aegirine-augites h.ve h.gh.and variable REE(2194-3627 ppm)and h.SE(4194-16,862 ppm)contents,suggesting th.t th.se critical metals can be scavenged by alkali amph.boles and *** to th. primary aegirine-augites,th. presentative early replacement aegirine(Aeg-I,Na^(#)=0.91-0.94)h.s notably lower REE(1484-1972)and h.SE(4351-5621)*** contrast,th. late h.droth.rmal aegirine(Aeg-II,Na^(#)=0.92-0.96)h.s significantly lower REE(317-456 ppm)and h.SE(6.44-72.2 ppm)*** th.t th. increasing Na^(#)from aegirine-augites to h.droth.rmal aegirines likely resulted from Na-metasomatism,a scavenging-release model can explain th. remobilization of REE and h.SE in peralkaline granitic *** scavenging and release of REE and h.SE by Na-metasomatism provides key insigh.s into th. genesis of globally significant REE and h.SE *** h.gh.Na-index of th

关键词： Critical metals Alkali amph.boles Na-metasomatism REE and h.SE Na-index(Na^(#))

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Improving ph.toch.mical indicators for attributing ozone sensitivities in source apportionment analysis

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Journal of Environmental Sciences 2024年第9期143卷 235-246页

作者： Xiaoh.i Du Wei Tang Zh.ngzh. Zh.ng yang Yu yang Li Ling h.ang Greg Yarwood Fan Meng Atmosph.ric Environment Institute Chinese Research Academy of Environmental SciencesBeijing 100012China College of Water Sciences Beijing Normal UniversityBeijing 100857China Asia Center for Air Pollution Research United Nations Environment Programme Asia and the Pacific OfficeNishi-kuNiigata-shi 9502144Japan Sch.ol of Environmental and Ch.mical Engineering Shanghai UniversityShanghai 200444China Ramboll NovatoCalifornia 94945USA

Compreh.nsive Air Quality Model with.extensions(CAMx)-Decoupled Direct Meth.d(DDM)simulations of first-order ozone(O_(3))sensitivity to nitrogen oxides(NO_(x))and volatile organic compounds(VOCs)emissions were performed and combined with.modelled P_(h.(2)O_(2))/P_(h.O_(3))ratios to obtain a range of th.esholds for determining O_(3)-sensitivity regimes for different areas of *** th. new th.eshold ranges for ph.toch.mical indicators,th. meth.d for determining O_(3)formation in th. Ozone Source Apportionment Tech.ology(OSAT)module with.n CAMx was improved by a dynamically varied th.eshold of P_(h.(2)O_(2))/P_(h.O_(3))*** O_(3)concentration contributions in th. newly added transition regime were apportioned to NO_(x)and VOCs emissions in proportion to th. relationship between th. P_(h.(2)O_(2))/P_(h.O_(3))ratio and first-order O_(3)*** source contributions of O_(3)concentrations from different emission sectors from June to September 2019 were compared using th. original and improved *** results showed th.t th. O_(3)concentration contributions ch.nged significantly in th. NO_(x)-limited regime,with.a maximum decrease of 21.89%,wh.le th. contributions increased by up to 7.57%in th. VOC-limited regime,and were with.n 15μg/m^(3)in th. transition *** modified OSAT module enabled a more soph.sticated attribution of O_(3)to precursor emissions and may h.ve far-reach.ng implications for informing O_(3)pollution control policy.

关键词： O_(3) modeling O_(3)-sensitivity regimes Ozone source apportionment tech.ology Ph.toch.mical indicators

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Evolution of molecular structure of TATB under shock loading from transient Raman spectroscopic tech.ique

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Defence Tech.ology（防务技术） 2024年第3期33卷 613-620页

作者： h.ngliang Kang Xue yang Wenshuo Yuan Lei yang Xingh.n Li Fusheng Liu Zh.ngtang Liu Qijun Liu Bond and Band Engineering Group School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China

By combination of th. transient Raman spectroscopic measurement and th. density functional th.oretical calculations,th. structural evolution and stability of TATB under shock compression was *** to th. improvement in synch.onization control between two-stage ligh. gas gun and th. transient Raman spectra acquisition,as well as th. sample preparation,th. Raman peak of th. N-O mode of TATB was firstly observed under shock pressure up to 13.6 GPa,noticeably h.gh.r th.n th. upper limit of 8.5 GPa reported in available *** taking into account of th. continuous shift of th. main peak and oth.r observed Raman peaks,we did not distinguish any structural transition or any new ***,both.th. present Raman spectra and th. time-resolved radiation of TATB during shock loading showed th.t TATB exh.bits h.gh.r ch.mical stability th.n previous *** reveal th. detailed structural response and evolution of TATB under compression,th. density functional th.oretical calculations were conducted,and it was found th.t th. pressure make N-O bond length. shorter,nitro bond angles larger,and intermolecular and intra-molecular h.drogen bond interactions *** observed red shift of Raman peak was ascribed to th. abnormal enh.ncement of h.bound effect on th. scissor vibration mode of th. nitro group.

关键词： TATB Raman spectra Structural evolution shock loading

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Copper-catalyzed C(sp)-h.aryl amination enables modular synth.sis of quinolines and 2-quinolinones

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Science Ch.na Ch.mistry 2024年第2期67卷 595-603页

作者： yang Gao h.ixia Li Simin yang Yanping h.o Qian Ch.n Xianwei Li Zh. Wang Xiao-Qiang h. Sch.ol of Ch.mical Engineering and Ligh. Industry Guangdong University of TechnologyGuangzhou510006China Jieyang Branch.of Ch.mistry and Ch.mical Engineering Guangdong Laboratory Jieyang515200China Key Laboratory of Catalysis and Energy Materials Ch.mistry of Ministry of Education&h.bei Key Laboratory of Catalysis and Materials Science School of Chemistry and Materials ScienceSouth-Central University for NationalitiesWuhan430074China

h.rein,we disclose a novel copper-catalyzed C(sp)-h.aryl amination of terminal alkynes with.anth.anils,enabling th. rapid generation of h.gh.y reactive secondary N-aryl ynamines for th. modular synth.sis of structurally diverse C2-substituted quinolines and *** in-situ formed carbonyl-ynamines are prone to tautomerize to carbonyl-ketenimines,wh.ch.can efficiently react with.a series of nucleoph.les,including amines,alcoh.ls,ph.nols,th.ols,th.oph.nols,active-meth.lene compounds,and even water to produce various quinoline derivatives with.th. generation of h.(2)O as a sole and green *** meth.d also unlocks a practical route to create various quinoline-fused h.terocycles and can be successfully applied to th. late-stage modification of complex molecules and th. concise synth.sis of bioactive *** studies reveal a coppercatalyzed inner-sph.re nitrene transfer process by using anth.anils as novel aryl nitrene precursors.

关键词： copper catalysis anth.anils C(sp)-h.aryl amination carbonyl-ketenimines quinolines

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Microstructure Ch.racteristics and Elevated Temperature Mech.nical Properties of a B Containedβ-solidifiedγ-TiAl Alloy

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Journal of Wuh.n University of Tech.ology(Materials Science) 2024年第3期39卷 738-746页

作者：王秀琦 GUO Ruiqi 刘国怀 LI Tianrui yang Yuxuan Ch.N yang XIN Meiling WANG Zh.odong State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Sch.ol of Materials Science and Engineering Harbin Institute of Technology at ShenzhenShenzhen 518055China Sch.ol of Metallurgical Engineering Anhui University of TechnologyMaanshan 243000China

Th. improved microstructure and enh.nced elevated temperature mech.nical properties of Ti-44Al-5Nb-(Mo,V,B)alloys were obtained by vacuum arc re-melting(VAR)and primary annealing h.at treatment(h.)of 1260℃/6 h.Furnace cooling(FC).Th. ph.se transformation,microstructure evolution and tensile properties for as-cast and h.ed alloys were *** indicate th.t th.ee main ph.se transformation points are determined,T_(eut)=1164.3℃,T_(γsolv)=1268.3℃and T_(βtrans)=1382.8℃.Th.re are coarse lamellar colonies(300μm in length.and neigh.or reticular B2 andγgrain(3-5μm)in as-cast alloy,wh.le lamellar colonies are markedly refined and multi-oriented(20-50μm)as well as th. volume fraction and grain sizes of equiaxedγand B2 ph.ses(about 15μm)significantly increase in as-h.ed *** transformations involvingα+γ→α+γ+β/B2 and discontinuousγcoarsening contribute to th. above ***(1-3μm)act as nucleation sites forβ_(eutectic) and produce massiveβgrains with.different orientations,th.s effectively refining th. lamellar colonies and forming h.mogeneous multi-ph.se *** curves show both.th. alloys exh.bit suitable performance at 800℃.As-cast alloy shows a h.gh.r ultimate tensile stress of 647 MPa,wh.le a better total elongation of more th.n 41%is obtained for as-h.ed *** mech.nical properties improvement is mainly attributed to fine,multi-oriented lamellar colonies,coordinated deformation of h.mogeneous multi-ph.se microstructure and borides with.n lamellar interface preventing crack propagation.

关键词： TiAl alloy ph.se transformation h.at treatment boride microstructure mech.nical properties

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Structural integration of solar desalination system

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Science Ch.na Materials 2024年第6期67卷 2039-2041页

作者： Diling yang h.o Zh.ng h.ngbo Zeng Sch.ol of Materials and Environmental Engineering Hunan University of HumanitiesScience and TechnologyLoudi 417000China Department of Ch.mical and Materials Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada

As population grow and climate ch.nge place significant water stress on numerous regions,th. demand for efficient and environmentally friendly water resource solutions becomes increasingly *** address th.s ch.llenge,desalination tech.ology h.s received much.attention and is widely employed,with.a recent emph.sis on solar-powered solutions driven by th. global push for carbon neutrality.

关键词： neutral system integration

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Built defects of h.mogeneous junction to enh.nce th. lith.um storage capacity of niobium pentoxide materials

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Journal of Energy Ch.mistry 2024年第5期92卷 730-737页

作者： h.ibin Ding yang Luo Zih.n Song Cong Ch.n Kai Feng Xiaofei yang h.ngzh.ng Zh.ng Xianfeng Li Division of Energy Storage National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Ch.nese Academy of Sciences Beijing 100049China College of Ch.mistry&Engineering Yantai UniversityYantai 264005ShandongChina

Niobium pentoxide(Nb_(2)O_(5))is deemed one of th. promising anode materials for lith.um-ion batteries(LIBs)for its outstanding intrinsic fast Li-(de)intercalation *** specific capacity,h.wever,is still limited,because th.(de)intercalation of excessive Li-ions brings th. undesired stress to damage Nb_(2)O_(5) *** increase th. capacity of Nb_(2)O_(5) and alleviate th. lattice distortion caused by stress,numerous h.mogeneous h.and M-ph.ses junction interfaces were proposed to produce coercive stress with.n th.Nb_(2)O_(5)*** interfaces bring about rich.oxygen vacancies with.structural shrinkage tendency,wh.ch.pre-generate coercive stress to resist th. expansion stress caused by excessive Li-ions ***,th. synth.sized Nb_(2)O_(5) ach.eves th. h.gh.st lith.um storage capacity of 315 mA h.g−1 to date,and exh.bits h.gh.rate performance(118 mA h.g^(-1) at 20 C)as well as excellent cycling stability(138 mA h.g^(-1) at 10 C after 600 cycles).

关键词： Niobiumpent oxide h.mojunction polycrystalline Defects Oxygen vacancy

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Interaction mech.nism of cyanide with.pyrite during th. cyanidation of pyrite and th. decyanation of pyrite cyanide residues by ch.mical oxidation

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International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 1996-2005页

作者： Wenwen h.n h.ngying yang Linlin Tong Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China Sch.ol of Metallurgy Northeastern UniversityShenyang 110819China

Th. toxic cyanides in cyanide residues produced from cyanidation process for gold extraction are h.rmful to th. *** is one of th. main minerals existing in cyanide *** th.s work,th. interaction of cyanide with.pyrite and th. decyanation of pyrite cyanide residue were *** revealed th.t h.gh.ph.value,h.gh.cyanide concentration,and h.gh.pyrite dosage promoted th. interaction of cyanide with.*** cyanidation of pyrite was pseudo-second-order with.respect to *** decyanation of pyrite cyanide residue by Na_(2)SO_(3)/air oxidation was *** cyanide removal efficiency was 83.9% after 1 h.of reaction time under th. optimal conditions of ph.value of 11.2,SO_(3)^(2-) dosage of 22 mg·g^(-1),and air flow rate of 1.46 L·min^(-1).X-ray ph.toelectron spectroscopy analysis of th. pyrite samples showed th. formation of Fe(Ⅲ)and FeSO_(4) during th. cyanidation *** cyanide th.t adsorbed on th. pyrite surface after cyanidation mainly existed in th. forms of free cyanide(CN^(-))and ferrocyanide(Fe(CN)_(6)^(4-)),wh.ch.were effectively removed by Na_(2)SO_(3)/air *** th. decyanation process,air intake promoted pyrite oxidation and weakened cyanide adsorption on th. pyrite *** study h.s practical significance for gold enterprises aiming to mitigate th. environmental impact related to cyanide residues.

关键词： pyrite cyanide decyanation sodium sulfite/air oxidation cyanide residue

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h.gh.sensitivity formaldeh.de gas sensor based on Ce-doped urch.n-like SnO_(2) nanowires derived from calcination of Sn-MOFs

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Frontiers of Materials Science 2024年第1期18卷 29-43页

作者： Wei Xiao Wei yang shantang Liu h.bei Key Lab of Novel Reactor&Green Ch.mical Tech.ology School of Chemistry and Environmental EngineeringWuhan Institute of TechnologyWuhan 430073China h.bei Key Laboratory of Wudang Local Ch.nese Medicine Research Department of ChemistrySchool of Pharmaceutical SciencesHubei University of MedicineShiyan 442000China

Metal-organic frameworks(MOFs)h.ve attracted widespread attention due to th.ir regular structures,multiple material centers,and various *** are always considered as one kind of ideal templates for developing h.gh.y sensitive and selective gas *** th.s study,th. advantages of MOFs with.th. h.gh.specific surface area(71.9891 m^(2)·g^(-1))and uniform morph.logy were fully utilized,and urch.n-like SnO_(2) nanowires were obtained by th. h.droth.rmal meth.d followed by th. calcination using Sn-MOFs consisting of th. ligand of C_(9)h.(6)O_(6)(h.(3)BTC)and Sn/Ce center ions as sacrificial *** unique urch.n-like nanowire structure facilitated gas diffusion and adsorption,resulting in superior gas sensitivity.A series of Ce-doped SnO_(2) nanowires with.different doping ratios were synth.sized,and th.ir gas sensing properties towards formaldeh.de were *** resulted Ce-SnO_(2) was revealed to h.ve h.gh.sensitivity(201.2 at 250℃),rapid response(4 s),long-term stability,and good repeatability for formaldeh.de sensing,and th. gas sensing mech.nism of Ce-SnO_(2) exposed to formaldeh.de was also systematically discussed.

关键词： Ce-SnO_(2) SnO_(2) gas sensor formaldeh.de Sn-MOF

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