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Highly efficient electrosynthesis of H_(2.O_(2.in acidic electrolyte on metal-free heteroatoms co-doped carbon nanosheets and simultaneously promoting Fenton process

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chinese Chemical Letters 2024年第7期35卷 514-518页

作者： Xiaodan wang Yingnan {1.u Zhibin {1.u Zhongjian {1. Tao zhang Yi Cheng Lecheng {2. Bin Yang Yang Hou Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310058China institute of Zhejiang University-Quzhou Quzhou 324000China Donghai Laboratory Zhoushan 316000China Ningbo institute of Materials Technology&Engineering University of Chinese Academy of SciencesNingbo 315200China School of Biological and Chemical Engineering NingboTech UniversityNingbo 315100China Zhejiang Hengyi Petrochemical Research institute Co. Ltd.Hangzhou 310058China

Recently electrochemical synthesis of H_(2.O_(2.through oxygen reduction reaction(ORR)via 2.^(-)pathway is considered as a green and on-site ***,it still remains a big challenge for fabricating novel metal-free catalysts under acidic solutions,since it suffers from high overpotential due to the intrinsically week*OOH ***,a co-doped carbon nanosheet(O/N–C)catalyst toward regulating O and N content was synthesized for improving the selectivity and activity of H_(2.O_(2.electrosynthesis *** O/N–C exhibits outstanding 2.-ORR performance with low onset potential of 0.4 V(***)and a selectivity of 92.4%in 0.1.mol/L HClO_(4)*** in situ electrochemical impedance spectroscopy(EIS)tests reveals that the N incorporation contributes to the fast ORR *** density functional theory(DFT)calculations demonstrate that the binding strength of*OOH was optimized by the co-doping of oxygen and nitrogen at certain content,and the O/N–C–COOH site exhibits a lower theoretical overpotential for H_(2.O_(2.formation than O–C–COOH ***,the promoted kinetics for typical organic dye degradation in simultaneous electron-Fenton process on O/N–C catalyst was demonstrated particularly for broadening its environmental application.

关键词： Oxygen reduction Metal-free catalyst H_(2.O_(2.electrosynthesis N doping Carbon materials

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Disaster effects of climate change in High Mountain Asia:State of art and scientific challenges Disaster effects of climate change in High Mountain Asia:State of art and scientific challenges

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Advances in Climate Change Research 2024年第3期15卷 367-389页

作者： Hao wang Bin-Bin wang Peng CUI Yao-Ming MA Yan wang Jian-Sheng HAO Yu wang Ya-Mei li li-Jun SUN Jiao wang Guo-Tao zhang Wei-Mo li Yu lei Wen-Qing ZHAO Jin-Bo TANG Chao-Yue li institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China institute of Geographic {1. and Natural Resources Research Chinese Academy of SciencesBeijing 100101China china‒Pakistan Joint Research Center on Earth {1. Chinese Academy of SciencesIslamabad 45320Pakistan College of Earth and Planetary sciences University of Chinese Academy of SciencesBeijing 100049China College of Atmospheric Science Lanzhou UniversityLanzhou 730000China National Observation and Research Station for Qomolongma Special Atmospheric Processes and Environmental Changes Dingri 858200China

High Mountain Asia(HMA)shows a remarkable warming tendency and divergent trend of regional precipitation with enhanced meteorological *** rapid thawing of the HMA cryosphere may alter the magnitude and frequency of nature *** reviewed the influence of climate change on various types of nature hazards in HMA region,including their phenomena,mechanisms and *** reveals that:1.the occurrences of extreme rainfall,heavy snowfall,and drifting snow hazards are escalating;accelerated ice and snow melting have advanced the onset and increased the magnitude of snowmelt floods;{1.due to elevating trigger factors,such as glacier debuttressing and the rapid shift of thermal and hydrological regime of bedrock/snow/ice interface or subsurface,the mass flow hazards including bedrock landslide,snow avalanche,ice-rock avalanches or glacier detachment,and debris flow will become more severe;3)increased active-layer detachment and retrogressive thaw slumps slope failures,thaw settlement and thermokarst lake will damage many important engineering structures and infrastructure in permafrost region;4)multi-hazards cascading hazard in HMA,such as the glacial lake outburst flood(GLOF)and avalanche-induced mass flow may greatly enlarge the destructive power of the primary hazard by amplifying its volume,mobility,and impact force;and 5)enhanced slope instability and sediment supply in the highland areas could impose remote catastrophic impacts upon lowland regions,and threat hydropower security and future water *** future,ongoing thawing of HMA will profoundly weaken the multiple-phase material of bedrock,ice,water,and soil,and enhance activities of nature *** and cascading hazards of high magnitude will prevail in *** the glacier runoff overpasses the peak water,low flow or droughts in lowland areas downstream of glacierized mountain regions will became more frequent and *** escalating hazards in the HMA region requires tackling s

关键词： High Mountain Asia Climate change Cryosphere degradation Nature hazards Disaster risk

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The crustal structure under Sanjiang and its dynamic implications:Revealed by seismic reflection/refraction profile between Zhefang and Binchuan,Yunnan

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Science china Earth {1. 2005年第9期48卷 1329-1336页

作者： zhang Zhongjie1, BAI Zhiming1, wang Chunyong2. TENG Jiwen1, Lü Qingtian3, li Ji{2.g1, liU Yifeng1 & liU Zhenkuan4 1. institute of Geology and Geophysics, chinese academy of sciences, Beijing 10002., china 2. institute of Geophysics, china Seismological Bureau, Beijing 100085, china 3. institute of Deposition Resource, chinese academy of Geo{12., Beijing 100037, china 4. School of Exploration and Information, china University of Geo{12., Beijing 100083, china institute of Geology and Geophysics Chinese Academy of Sciences Beijing China institute of Geophysics China Seismological Bureau Beijing China institute of Deposition Resource Chinese Academy of Geosciences Beijing China School of Exploration and Information China University of Geosciences Beijing China

The fault belts in Sanjiang mainly include Jinshajiang-Honghe fault, Lancangjiang fault and Nujiang fault (called Sanjiang faults) in western Yunnan Province, china. By interpreting the wide-angle seismic reflection/refraction profile between Zhefang and Binchuan, which crosses Tengchong and Baoshan blocks in Dianxi (western Yunnan) tectonic zone, we recon- struct the crustal structure with seismic traveltime tomography for crustal P-wave velocity and the seismic scattering image for crustal seismic reflection structure. In this paper, we firstly present the crustal structure images of P-wave velocity and seismic reflection under the wide-angle seismic profile. These results demonstrate that, the crustal velocity structure and seismic reflec- tion structure along the profile can be divided into 3 segments, and there is an obvious difference of crustal structure among the eastern, the western and the middle segment. Generally, crustal P-wave velocities in the Baoshan segment are 0.1.0.{1.km/s slower and seismic reflection am- plitudes from Moho discontinuity are stronger than the other {1.segments. In the studied area, crustal thickness is about 40 km, and shows the thickening tendency from west to east along the profile. Additionally, it can be seen that there is one strong-amplitude seismic reflection event as bright points at the depths of 8―1. km, along the segment of 80―1.5 km of the profile (south- ward of Tengchong); and seismic reflection wave-field from Moho discontinuity varies obviously along the lateral direction. Finally, we make some discussions on the crustal thickening pattern in the Sanjiang fault belt, structural environment of earthquake development and the contact rela- tionship between the Tengchong block, Banshan block and Luxi trough.

关键词： Sanjiang area wide-angle seismic profile crustal structure.

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Advances in Atmospheric Radiation:Theories,Models,and Their ***Ⅱ:Radiative Transfer Models and Related Applications

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Journal of Meteorological Research 2024年第2期38卷 183-208页

作者： Hua zhang Feng zhang {2. liU Yuzhi liU Husi LETU Yuanjian YANG Zhengqiang li Kun WU Shuai HU Ming li Tie DAI Fei wang Zhili wang Yuxiang liNG Yining SHI Chao liU State Key Laboratory of Severe Weather and institute of C{1.mate System Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081 Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044 Department of Atmospheric and Oceanic sciences&{1. of Atmospheric sciences Fudan UniversityShanghai 200438 College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073 College of Atmospheric sciences Lanzhou UniversityLanzhou 730000 State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100101 School of Atmospheric Physics Nanjing University of Information Science&TechnologyNanjing 210044 School of Atmospheric sciences Nanjing University of Information Science&TechnologyNanjing 210044 institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029 CMA Earth System Modeling and Prediction Centre China Meteorological Administration(CMA)Beijing 100081

The subject of“atmospheric radiation”includes not only fundamental theories on atmospheric gaseous absorption and the scattering and radiative transfer of particles(molecules,cloud,and aerosols),but also their applications in weather,climate,and atmospheric remote sensing,and is an essential part of the atmospheric *** review includes two parts(Part I and PartⅡ);following the first part on gaseous absorption and particle scattering,this part(PartⅡ)reports the progress that has been made in radiative transfer theories,models,and their common applications,focusing particularly on the contributions from chinese *** recent achievements on radiative transfer models and methods developed for weather and climate studies and for atmospheric remote sensing are firstly ***,the associated applications,such as surface radiation estimation,satellite remote sensing algorithms,radiative parameterization for climate models,and radiative-forcing related climate change studies are summarized,which further reveals the importance of radiative transfer theories and models.

关键词： atmospheric radiation radiative transfer remote sensing radiative forcing climate change

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Wave tectono-sedimentary processes in Tarim basin

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Science china Earth {1. 2005年第11期48卷 1949-1959页

作者： JIN Zhijun1.2. {1. Yiwei1.& CHEN Shuping1.1. Key Laboratory for Hydrocarbon Accumulation, Ministry of Education, china University of Petroleum, Beijing 1.2.49, china 2. Exploration and Production Research institute, china Petroleum & Chemical Corporation, Beijing 1.0083, china Key Laboratory for Hydrocarbon Accumulation Ministry of Education China University of Petroleum Beijing China Exploration and Production Research institute China Petroleum & Chemical Corporation Beijing China

Based on the unconformities, the formation times of structures, and geological wave filtering applied to basin fills of typical wells around the Manjiaer area in the Tarim basin, the wave tectono-sedimentary processes in the Tarim Basin are discussed. The results of geological wave filtering of basin fills of typical wells show that, in time domain, the evolution of the Tarim basin was controlled by various wave processes with the periods of 740±Ma, {1.0±Ma, 1.0±Ma and 30±Ma. The analyses of basin fills, basin subsidence and unconformities show that the trends of the sedimentary facies belts, depocenters, and centers of subsidence migrated and interchanged periodically with periods of {1.0±Ma. These show the propagation of wave movements in space domain. The wave evolution of the Tarim basin is of significance to understanding the formation of the oil and gas reservoirs in the basin.

关键词： Tarim basin, tectonics, sedimentation, crustal undation, wave evolution

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Comparison of energy structure and spectral properties of Ce:LaAlO_3 and Ce:Lu_2.SiO_4)O

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Science china(Technological {1.) 2009年第12期52卷 3678-3682页

作者： wang XiaoDan 1 ,PAN Tao 1 ,ZANG TaoCheng 1 ,li JianKang 1 ,ZHAO ZhiWei 2.,zhang {2.Han 2.&XU Jun3 1Department of Applied Physics,University of Science and Technology of Suzhou,Suzhou 2.5009,china 2.hanghai institute of Optics and Fine mechanics,chinese academy of sciences,Shanghai 2.1800,china 3Shanghai institute of Ceramics,chinese academy of sciences,Shanghai 2.1800,china Department of Applied Physics University of Science and Technology of Suzhou

Undoped LaAlO3 and 1.at.%Ce:LaAlO3 single crystals were grown by the Czochralski *** and fluorescence spectra were measured at room *** energy levels structure of Ce:LaAlO3 was *** this paper,two viewpoints were *** first one is:the energy levels structure of Ce:LaAlO3 is very similar to that of Ce:Lu2.SiO4)O which is a well-known *** the energy levels structure of Ce:LaAlO3 and Ce:Lu2.SiO4)O,the lowest 5d energy level of Ce 3+ is located below the bottom of the conduction band of host crystal and the other higher 5d energy levels of Ce 3+ are located above the bottom of the conduction band of host *** second one is:Ce:LaAlO3 single crystal may not be suitable for scintillation application;by comparing the energy levels structures of Ce:LaAlO3 and Ce:Lu2.SiO4)O,the large energy difference(1.1. eV)between the two lowest 5d energy levels of Ce 3+ in LaAlO3 is a crucial factor that causes the luminescence quenching.

关键词： Ce:LaAlO3 Ce:Lu2.SiO4)O energy-level absorption luminescence

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Molecular evolution of stress-response gene Leptin in high-altitude chinese snub-nosed monkeys (Rhinopithecus genus)

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chinese Science Bulletin 2010年第36期55卷 4132-4135页

作者： wang XiaoPing1,2. JIN Wei1,2. YU li1,2.& {2. YaPing1,2.1 Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming 650091, china 2.State Key Laboratory of Genetic Resources and Evolution, Kunming institute of Zoology, chinese academy of sciences, Kunming 6502.3, china Laboratory for Conservation and Utilization of Bio-resource Yunnan University Kunming 650091 China State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650223 China

chinese snub-nosed monkeys (genus Rhinopithecus, subfamily Colobinae), including R. bieti, R. bre{1.chi and R. roxellana, are well-known as the non-human primates with the highest known altitudinal distribution. They represent an interesting model organism of adaptation to the extreme environmental stresses. However, no study at the molecular level has yet been reported for the high-altitude adaptation in chinese snub-nosed monkeys. Leptin, as an adipocyte-derived hormone, is be{1.eved to play an important role in energy homeostasis in adaptation to high altitude environments. In the present study, we sequenced and compared leptin sequences of the chinese snub-nosed monkeys (R. bieti and R. roxellana) with their lowland close relative R. avunculus and other Colobines. Unexpectedly, no amino acid changes were observed in the 7 Colobinae species examined, including the 2.chinese snub-nosed monkeys, indicating no difference in the evolutionary pattern of the Leptin gene between high-altitude monkeys and their lowland counterparts. In contrast to a previous finding of adaptive evolution of Leptin gene in plateau pikas, our study suggests that this gene may not have an important role in high-altitude adaptation of chinese snub-nosed monkeys. Other nuclear genes associated with energy metabo{1.sm, or mitochondrial genes, are most {1.kely to be involved the molecular mechanism underlying adaptation of these monkeys to cold and hypoxia associated with the highland environment.

关键词： Leptin基因金丝猴属瘦素基因压力反应分子进化高空鼻极端环境

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Facile Surface Engineering of NiCo_(2.O_(4) to Boost Propane Oxidation Activity

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china Petroleum Processing & Petrochemical Technology 2024年第1期26卷 19-26页

作者： Yang Jialei {1. Fengyi lei Yang zhang Mingchao Sun Shiqiang Xu Wenfan Ke Jiaxiang Wu Haojie li Xingyun Qi Jian institute of Materials for Energy and Environment College of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Chemistry and Chemical Engineering Hubei Key Laboratory of Coal Conversion and New Carbon MaterialsWuhan University of Science and TechnologyWuhan 430081China Department of Burn and Plastic Surgery Qingdao Municipal Hospital Affiliated to Rehabilitation UniversityQingdao 266000China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Spinel oxide(NiCo_(2.O_(4))has demonstrated great potential to replace noble metal catalysts for the oxidation reaction of air *** further boost the oxidation abi{1.ty of such catalysts,in this study,a facile surface-engineering strategy wherein NiCo_(2.O_(4) was treated with different alka{1. solvents was *** obtained catalyst(NiCo_(2.O_(4)-OH)showed a higher surface alka{1.nity and more surface defects compared to the pristine spinel oxide,including enhanced structural distortion as well as promoted oxygen *** propane oxidation abi{1.ty of NiCo_(2.O_(4)-OH was greatly enhanced,with a propane conversion rate that was approximately 6.4 times higher than that of pristine NiCo_(2.O_(4) at a reaction temperature 1.3℃.This work sets a valuable paradigm for the surface modulation of spinel oxide via alka{1. treatment to ensure a high-performance oxidation catalyst.

关键词： NiCo_(2.O_(4) surface defects alkali treatment propane oxidation

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Effects of conductive agent type on lithium extraction from salt lake brine with liFePO_(4) electrodes

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 678-687页

作者： Zhen zhang Pan Luo Yan zhang Yuhan {2. li liao Bo Yu Mingshan {2. Junchen Chen Bingshu Guo Xing li School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China Energy Storage Research institute Southwest Petroleum UniversityChengdu 610500China

Electrochemical lithium extraction from salt lakes is an effective strategy for obtaining lithium at a low ***,the elevated Mg:li ratio and the presence of numerous coexisting ions in salt lake brines give rise to challenges,such as prolonged lithium extraction periods,diminished lithium extraction efficiency,and considerable environmental *** this work,li FePO4(LFP)served as the electrode material for electrochemical lithium *** conductive network in the LFP electrode was optimized by adjusting the type of conductive *** approach resulted in high lithium extraction efficiency and extended cycle *** the single conductive agent of acetylene black(AB)or multiwalled carbon nanotubes(MWCNTs)was replaced with the mixed conductive agent of AB/MWCNTs,the average diffusion coefficient of li+in the electrode increased from 2.35×1.^(-9)or 1.77×1.^(-9)to 4.2.×1.^(-9)cm^(2.·s^(-1..At the current density of 2. mA·g^(-1.,the average lithium extraction capacity per gram of LFP electrode increased from 30.36 mg with the single conductive agent(AB)to 35.62.mg with the mixed conductive agent(AB/MWCNTs).When the mixed conductive agent was used,the capacity retention of the electrode after 30 cycles reached 82.9%,which was considerably higher than the capacity retention of 65.8%obtained when the single AB was ***,the electrode with mixed conductive agent of AB/MWCNTs provided good cycling *** the conductive agent content decreased or the loading capacity increased,the electrode containing the mixed conductive agent continued to show excellent electrochemical ***,a self-designed,highly efficient,continuous lithium extraction device was *** electrode utilizing the AB/MWCNT mixed conductive agent maintained excellent adsorption capacity and cycling performance in this *** work provides a new perspective for the electrochemical extraction of lithium using LFP electrodes.

关键词： salt lake brine lithium extraction electrochemical lithium extraction conductive agent extraction efficiency adsorption capacity

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Investigation of stress-induced progressive failure of mine pillars using a Voronoi grain-based breakable block model

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International Journal of Mining Science and Technology 2024年第5期34卷 713-729页

作者： Shili Qiu Shirui {1. Quan Jiang Shaojun li Hao {1. Qiankuan {2. State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China University of chinese academy of sciences Beijing 100049China State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China

The Voronoi grain-based breakable block model(VGBBM)based on the combined finite-discrete element method(FDEM)was proposed to explicitly characterize the failure mechanism and predict the deformation behavior of hard-rock mine *** influence of the microscopic parameters on the macroscopic mechanical behavior was investigated using laboratory-scale *** field-scale pillar models(width-to-height,W/H=1.{1.and 3)were calibrated based on the empirically predicted stress-strain curves of Creighton mine *** results indicated that as the W/H ratios increased,the VGBBM effectively predicted the transition from strain-softening to pseudo-ductile behavior in pillars,and explicitly captured the separated rock slabs and the V-shaped damage zones on both sides of pillars and conjugate shear bands in core zones of *** volumetric strain field revealed significant compressional deformation in core zones of *** the peak strains of W/H=1.and {1.pillars were relatively consistent,there were significant differences in the strain energy storage and release mechanism.W/H was the primary factor influencing the deformation and strain energy in the pillar *** friction coefficient of the structural plane was also an important factor affecting the pillar strength and the weakest discontinuity *** fracture surface was controlled by the discontinuity angle and the friction *** study demonstrated the capability of the VGBBM in predicting the strengths and deformation behavior of hard-rock pillars in deep mine design.

关键词： Pillar strength FDEM Voronoi tessellation Spalling Bulking

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