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Defect-Rich,Candied Haws-Shaped AuPtNi Alloy Nanostructures for Highly Efficient Electrocatalysis

CCS Chemistry 2020年第1期2卷 24-30页

作者： Xiaoya Cui Zhicheng Zhang Yue Gong Faisal Saleem Bo Chen Yonghua Du Zhuangchai Lai Nailiang Yang Bing Li Lin Gu Hua Zhang Department of Chemistry City University of Hong KongHong KongChina Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190ChinaSchool of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China National Synchrotron Light Source II Brookhaven National LaboratoryUpton 11973NYUSA State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of Sciences Beijing 100190China Institute of Materials Research and Engineering(IMRE) A*STAR(Agency for ScienceTechnology and Research)Singapore 138634Singapore

The rational design and synthesis of multimetallic nanostructures(NSs)with rich defects are of significant importance for their diverse applications,including their promising usage as high-efficiency catalysts for alcohol oxidation reaction as a fuel ***,we report the synthesis of defect-rich,candied haws-shaped AuPtNi NSs using presynthesized gold(Au)nanowires as *** ternary AuPtNi NSs possess rich defects such as twins,stacking faults,and atomic ***,the AuPtNi NSs exhibited excellent mass and specific activities toward methanol and ethanol oxidation reactions under acidic *** current work paves the way for the rational design and controlled synthesis of defect-rich multimetallic NSs to boost their performances in catalytic reactions.

关键词： noble metal alloy multimetallic nanostructure defect electrocatalysis

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Refined description of the positive-parity bands and the extent of octupole correlations in Ba120

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Physical Review C 2022年第4期105卷 044319-044319页

作者： B. F. Lv C. M. Petrache K. K. Zheng Z. H. Zhang W. Sun Z. P. Li X. T. He J. Zhang A. Astier P. Greenlees T. Grahn R. Julin S. Juutinen M. Luoma J. Ojala J. Pakarinen J. Partanen P. Rahkila P. Ruotsalainen M. Sandzelius J. Sarén H. Tann J. Uusitalo G. Zimba B. Cederwall Ö. Aktas A. Ertoprak W. Zhang S. Guo M. L. Liu H. J. Ong Z. Y. Sun J. G. Wang X. H. Zhou I. Kuti B. M. Nyakó D. Sohler J. Timár C. Andreoiu M. Doncel D. T. Joss R. D. Page Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China Université Paris-Saclay CNRS/IN2P3 IJCLab 91405 Orsay France Mathematics and Physics Department North China Electric Power University Beijing 102206 China School of Physical Science and Technology Southwest University Chongqing 400715 China College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Physics University of Jyväskylä Jyväskylä FIN-40014 Finland Oliver Lodge Laboratory Department of Physics University of Liverpool Liverpool L69 7ZE United Kingdom KTH Department of Physics S-10691 Stockholm Sweden School of Nuclear Science and Technology University of Chinese Academy of Science Beijing 100049 China Institute for Nuclear Research (Atomki) Pf. 51 4001 Debrecen Hungary Department of Chemistry Simon Fraser University Burnaby BC V5A 1S6 Canada

Three new negative-parity bands have been identified in Ba120, two of them forming a strongly coupled band. The previously known negative-parity band is significantly extended to high spin, while the lower part of the yrare positive-parity band has been modified. From the analysis of the band properties and comparison with the neighboring nuclei a coherent description of all bands is achieved. In particular, a simple explanation of the evolution of the positive-parity bands at high spin is proposed, including the possible occupation of the νf7/2[541]1/2− intruder orbital. Cranked Nilsson-Strutinsky calculations reveal similar quadrupole deformations but different triaxiality of the bands, while particle number conserving cranked shell model calculations qualitatively reproduce the experimental data and support the assigned configurations. The new measured ratios of reduced transition probabilities B(E1)/B(E2) complete the systematics in the Ba118–124 nuclei, exhibiting a decrease with decreasing neutron number, and are compared with the known values in the Xe116–120 nuclei, which are larger. Extended calculations with the quadrupole and octupole collective Hamiltonian based on the relativistic Hartree-Bogoliubov model employing the relativistic DD-PC1 density functional nicely reproduce the decreasing trend towards lower neutron numbers for Ba and Xe nuclei, as well as the larger values in Xe nuclei, but are much larger in amplitude than the experimental values. On the other hand, particle number conserving cranked shell model calculations without octupole deformation overestimate the low-spin values, while those with octupole deformation included reproduce the experimental values in Ba120, suggesting the possible existence of moderate octupole collectivity in the negative-parity bands of nuclei in this mass region.

关键词： Collective levels Collective models Electromagnetic transitions Nuclear spin & parity Nuclear structure & decays 90 ≤ A ≤ 149

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Global Meta-analysis Reveals Drivers and Risks of Cylindrospermopsin in Aquatic Ecosystems

SSRN

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SSRN 2022年

作者： Xu, Yaoyang Jia, Nannan Rzymski, Piotr Li, Xiaochuang Afanasyev, Sergey Wang, Yilang Li, Renhui Key Laboratory of Urban Environment and Health Ningbo Urban Environment Observation and Research Station Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control CAS Haixi Industrial Technology Innovation Center in Beilun Ningbo315830 China Department of Environmental Medicine Poznan University of Medical Sciences Poznań60-806 Poland Poznań60-806 Poland State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Institute of Hydrobiology of Ukrainian National Academy of Sciences Kyiv03115 Ukraine College of Life and Environmental Science Wenzhou University Wenzhou325035 China

Cylindrospermopsin (CYN) is one of the most frequently monitored and identified cyanotoxins worldwide, but the drivers of its occurrence and the ecological and human health risks in aquatic ecosystems are still to be fully explored. In this study, a meta-analysis of the Literature-Data-analysis framework was utilized to mine the data of CYN and its associated parameters from all existing publications. Overall, 104 peer-reviewed articles investigating CYN presence until 2021 in a total of 507 aquatic ecosystems across 40 countries have been identified, and of these, 57.8% (n=293) in 31 countries tested positive. To analyze the ecological drivers of CYN presence, quantile regression was used instead of traditional ordinary-least-squares regression to ensure better quantification of cause-effect relationships. The results showed that the key drivers differed at different quantiles and high water temperature, ammonia, and dissolved inorganic phosphorus were responsible for excessively high CYN concentrations. Additionally, ecological and human health risk assessment for CYN were also conducted. Generally, the ecological risk of CYN was low, but the identified human health risk was a cause for concern. This study adds to a scientific basis for the prevention, control, and risk management process of CYN from a data-supported perspective on the global scale. © 2022, The Authors. All rights reserved.

关键词： Risk assessment

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Role of structural anisotropy in geometric birefringence of high-birefringence index-guiding PCFs: analysis by moment of inertia

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Optical and Quantum Electronics 2019年第1期51卷 1-12页

作者： Liang, Sheng Zhang, Yongxin Zhang, Xingyu Sheng, Xinzhi Lou, Shuqin Wang, Xin Lin, Bo Dong, Mingli Zhu, Lianqing Luo, Jueting Peng, Rui Liang, Liuyan Lin, Yuqin Wang, Jinli Yang, Yue Kang, Shuai Huang, Yuelang Ding, Jiazheng Xu, Wenxuan Li, Fuxiao Key Laboratory of Education Ministry on Luminescence and Optical Information Technology National Physical Experiment Teaching Demonstration Center Department of Physics School of Science Beijing Jiaotong University Beijing 100044 China School of Electronic and Information Engineering Beijing Jiaotong University Beijing 100044 China China Academy of Electronics and Information Technology Beijing 100041 China Beijing Engineering Research Center of Optoelectronic Information and Instruments Beijing Key Laboratory for Optoelectronics Measurement Technology Beijing Information Science and Technology University Beijing 100016 China

We have studied the role of structural anisotropy on the geometric birefringence of four typical high-birefringence (HB) index-guiding photonic crystal fibers (PCFs) with the same air-silica structure and circular, ellipse, and rectangle air holes, respectively. The normalized difference between the moment of inertia ΔI in x and y direction of the PCF structure is utilized to quantificationally describe the structural anisotropy. We demonstrate that the phase birefringence B increases monotonously when the normalized ΔI rises in different cases of PCFs structures. In order to obtain high birefringence B, it can be an effective method to optimize the parameters of the structure to increase the normalized ΔI. This work can be not only a reference of founding the essence of geometric birefringence and proposing the optimal design of HB-IG-PCFs, but also an enlightenment for bringing the different method (compared to the finite element) into the investigation of PCFs. © 2018, Springer science+Business Media, LLC, part of Springer Nature.

关键词： Birefringence Geometric birefringence Moment of inertia Photonic crystal fiber (PCF) Polarization maintenance Structural anisotropy

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The Experimental Research on Efficient Process of Bio-aromatics Production 4

The Experimental Research on Efficient Process of Bio-aromat...

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4th International Conference on Environmental and Energy Engineering, IC3E 2020

作者： Wang, Chao Liu, Li Yu, Guanglin Xie, Zhengwu Liu, Jianping Chen, Guanyi Zhou, Hongjun CECEP Engineering Technology Research Institute Beijing China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai China China Energy Conservation and Environmental Protection Group Beijing China School of Environmental Science and Engineering Tianjin University Tianjin China State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing China

The process research of biomass catalytic cracking for production of bio-aromatics was performed with a 50kg/h riser reactor designed by China Energy Conservation and Environmental Protection Group (CECEP). The catalyst was chosen on the basic of a previous study, were Zn2+ exchanged zeolite type catalyst supplied by China University of Petroleum. Via analysis of the liquid product collected in different temperatures, influence of reaction temperature on the yield of bio-aromatics is investigated in this paper, the high yield of aromatics form corn stalk is 15.5wt%, obtained at 500°C, while gas yield is 33.5wt%. The creative process described in this paper provides a new efficient and easily scaled method for bio-aromatics production, also could be available to industrial pilot plant design studies. © Published under licence by IOP Publishing Ltd.

关键词： Catalysts

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Ruthenium(II) complexes-catalyzed direct oxidation of primary amines to amides using air as oxidant

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Polyhedron 2025年 279卷

作者： Zhiqiang Hao Jinyue Li Hui Xu Zhuohao Jiao Zhihong Ma Jinjin Zhao Jin Lin Hebei Technology Innovation Center for Energy Conversion Materials and Device Hebei Key Laboratory of Organic Functional Molecules Testing and Analysis Center College of Chemistry and Materials Science Hebei Normal University Shijiazhuang 050024 People's Republic of China School of Pharmacy Hebei Medical University Shijiazhuang 050017 People's Republic of China

The catalytic performance of salicylaldimine-based ruthenium carbonyl complexes [ArN = CH(3- t BuC 6 H 3 O)] 2 Ru(CO) 2 [Ar = C 6 H 5 ( 1a ); 4-OMeC 6 H 4 ( 1b ); 4-MeC 6 H 4 ( 1c ); 2,4,6-Me 3 C 6 H 2 ( 1d ); 4-ClC 6 H 4 ( 1e ); 4-BrC 6 H 4 ( 1f )] were explored in aerobic oxidation of aromatic amines to amides in refluxing t BuOH. All the ruthenium complexes 1a-1f showed good catalytic activity to selectivity access to amines and the complex 1f was found to the best catalyst. The present catalytic system is operationally simple and displayed good functional group tolerance. A variety of amides were obtained in 47 %–90 % yields.

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Investigating the Period-Luminosity Relations of δ Scuti Stars: A Pathway to Distance and 3-D Dust Map Inference

arXiv

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arXiv 2025年

作者： Guo, Fangzhou Bloom, Joshua S. Wang, Xiaofeng Chen, Liyang Lin, Jie Chen, Xiaodian Mo, Jun Zhang, Jicheng Yan, Shengyu Liu, Qichun Peng, Haowei Jiang, Xiaojun Ma, Xiaoran Xiang, Danfeng Li, Wenxiong Physics Department Tsinghua University Beijing100084 China Astronomy Department University of California BerkeleyCA94720 United States Lawrence Berkeley National Laboratory 1 Cyclotron Road MS 50B-4206 BerkeleyCA94720 United States Department of Astronomy University of Science and Technology of China Hefei230026 China Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China Department of Physics and Astronomy Beijing Normal University Beijing100875 China Beijing Planetarium Beijing Academy of Sciences and Technology Beijing100044 China National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China

Context. While δ Scuti stars—intermediate-mass stars pulsating with periods s) and mid-infrared (W1, W2, W3) bands, respectively. Parallax data, used as Bayesian priors, were retrieved from Gaia DR3, and line-of-sight dust extinction priors were estimated from a three-dimensional dust map. Using PyMC, we performed a simultaneous determination of the 11-band P-L relations of δ Scuti stars. Results. The simultaneous determination of multiband P-L relations of δ Scuti stars not only yields precise measurements of these relations, but also greatly improves constraints on the distance moduli and color excesses, as evidenced by the reduced uncertainties in the posterior distributions. Furthermore, our methodology enables an independent estimation of the color excess through the P-L relations, offering a potential complement to existing 3-D dust maps. Moreover, by cross-matching with LAMOST DR7, we investigated the influence of metallicity on the P-L relations. Our analysis reveals that incorporating metallicity might reduce the intrinsic scatter at longer wavelengths. However, this result does not achieve 3σ significance, leaving open the possibility that the observed reduction is attributable to statistical fluctuations. Conclusions. We introduced an innovative approach to studying the P-L relations of δ Scuti stars, facilitating more comprehensive investigations into their utility as distance indicators and their significance in understanding stellar evolution. Our extensible methodology also enables the inference of dust extinction using pulsating stars beyond δ Scuti stars. Although the inclusion of metallicity in the P-L relations appears to reduce intrinsic scatter at longer wavelengths, further analysis is required to fully understand the impact of metal abundance on properties of δ Scuti stars. Copyright © 2025, The Authors. All rights reserved.

关键词： Giant stars

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The impact of weathering, iron oxides, and aluminous clays on organic carbon storage and stability in an extensive tropical river system

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CATENA 2025年 258卷

作者： Md Hafijur Rahaman Khan Long Tan Jianguo Liu Ananna Rahman Yun Huang Shengfa Liu Zhong Chen Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China University of Chinese Academy of Sciences Beijing 100049 China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao 266100 China Laboratory for Marine Geology Qingdao Marine Science and Technology Center Qingdao 266061 China Key Laboratory of Marine Geology and Metallogeny First Institute of Oceanography Ministry of Natural Resources Qingdao 266061 China

Understanding the factors controlling organic carbon (OC) dynamics in tropical river systems is essential for evaluating their role in global carbon cycling. This study explores how mineralogical composition, particularly aluminous clays and pedogenic iron oxides (Fe d ), influences OC storage and stability in the Ganges–Brahmaputra (G–B) river system within the Bengal Basin. The G-B river system transports substantial terrestrial organic matter (OM) into the Bay of Bengal, making it a key component of the global carbon cycle. The Brahmaputra River sediments are enriched with C 3 plant-derived OM, as indicated by lower δ 13 C values (−24.0 ‰) compared to those from the Ganges (−23.8 ‰ to − 22.4 ‰). A significant drop in OC content in the Indo-Gangetic Floodplain (0.27 % to 0.03 %), followed by an increase in the Bengal Basin (0.15 %), suggests partial oxidation of Himalayan OC, which is subsequently replaced by OC from floodplain sources during downstream transport. Clay content (3.7 ± 2.0 %) and Fe d concentration (0.13 ± 0.07 %) in Ganges River sediments are significantly lower than those of the Brahmaputra (7 ± 2.3 % and 0.30 ± 0.07 %, respectively). Illite, a dominant clay mineral, exhibits a strong positive correlation with OC content, while smectite shows a negative correlation, likely due to its secondary formation, short interaction time with OM, and limited OC retention capacity. Fe d significantly contributes to OC preservation through interacting with minerals, particularly in chemical-weathered regions. Regression analysis identifies Fe d and illite as the most influential factors in OC storage, contributing 52 % and 48 %, respectively, while grain size shows a minor negative impact. The heavy fraction of OM, comprising over 90 % of total OC, underscores the importance of mineral-associated OC (OC MA ) in long-term storage. Enhanced chemical weathering in the Ganges floodplains destabilizes pre-formed OC MA , reducing OC storage (∼25 %) and increasing CO

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Integrated Small RNA Sequencing, Transcriptome, and GWAS Data Reveal miRNA Regulation in Response to Milk Protein Traits in Chinese Holstein Cattle

Research Square

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Research Square 2021年

作者： Cai, Wentao Li, Cong Li, Junya Song, Jiuzhou Zhang, Shengli Laboratory of Molecular Biology and Bovine Breeding Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing100193 China Key Laboratory of Animal Genetics Breeding and Reproduction Ministry of Agriculture National Engineering Laboratory for Animal Breeding College of Animal Science and Technology China Agricultural University Beijing100193 China Department of Animal and Avian Science University of Maryland College ParkMD20742 United States

Background: Milk protein is one of the most important economic traits in the milk industry. Our previous study has revealed some functional genes responsible for milk protein synthesis in mammals. Yet, the miRNA-mediated gene regulatory network for the synthesis of milk protein in mammary is poorly understood. Results: 12 samples from Chinese Holstein Cows with three too high and three low phenotypic values for milk protein percentage in lactation and non-lactating were examined through deep small RNA sequencing. By bioinformatics analysis, we characterized 387 known and 212 novel miRNAs in the mammary gland. Differentially expressed analysis detected 28 miRNAs in lactation and 52 miRNAs in the non-lactating period with a highly significant correlation with milk protein concentration. Target prediction and correlation analysis identified some key miRNAs and their targets potentially involved in the synthesis of milk protein. Using genome-wide association signal (GWAS) enrichment analysis among five milk production traits, we found the differentially expressed targets were significantly related to milk protein traits. Conclusions: This integrated study on the transcriptional and post-transcriptional regulatory profiles between significantly differential phenotype of milk protein concentration provides new insights into the mechanism of milk protein synthesis, which should reveal the regulatory mechanisms of milk secretion. © 2021, CC BY.

关键词： Mammals

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The Mini-SiTian Array: Light Curves analysis of Asteroids

arXiv

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arXiv 2025年

作者： Liu, Zhaoxing Gao, Jian Gu, Hongrui Huang, Yang Hu, Shaoming Zou, Hu Xing, keyu Huang, Hao Zhang, Zehao Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Beijing102206 China School of Physics and Astronomy Beijing Normal University Beijing100875 China Key Lab of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing100049 China Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment School of Space Science and Technology Institute of Space Sciences Shandong University Weihai264209 China

The SiTian project, with its vast field of view, will become an ideal platform for asteroid scientific research. In this study, we develop a pipeline to analyze the photometry of asteroids and derive their periods from the data collected by the SiTian pathfinder project Mini-SiTian (MST). The pipeline is applied to the MST f02 region, a MST test region with a sky area of 2.29◦×1.53◦. Rotation periods of 22 asteroids are derived by the obtained light curves analysis. Among them, there are 8 asteroids available in the Asteroid Lightcurve Photometry Database (ALCDEF), and 6 of them with more photometric points (>200) have similar period parameters as the ones in ALCDEF. Additionally, the periods for 14 of these asteroids are newly obtained and are not listed in ALCDEF. This study demonstrates the feasibility of asteroid photometric research by the SiTian project. It shows that future observations from the SiTian project will provide even more photometry of asteroids, significantly increasing the number of available light curves. The potential vast photometric data of asteroids will help us to further understand the physics of asteroids, their material composition, and the formation and evolution of the solar system. Copyright © 2025, The Authors. All rights reserved.

关键词： Asteroids

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