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Why do CuAl catalysts outperform in CO_(2) electro-reduction to C_(2)H_(4)?

Science China Chemistry 2025年第2期68卷 763-771页

作者： Dongfang Cheng Gong Zhang Lulu Li Xiangcheng Shi Wenjin Zhu Xintong Yuan Lyudmila Moskaleva Peng Zhang zhi-jian Zhao Jinlong Gong Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin University Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Department of Chemistry University of the Free StateBloemfontein 9301South Africa Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China National Industry-Education Platform of Energy Storage Tianjin UniversityTianjin 300350China International Joint Laboratory of Low-carbon Chemical Engineering Tianjin 300192China Tianjin Normal University Tianjin 300387China

Highly efficient CO_(2) electroreduction(CO_(2)RR)holds the promise of closing the carbon ***,the strategies for enhancing activity and selectivity for single C2+ products are still *** paper describes the oxophilicity of doped metals on copper(Cu)as a key descriptor for predicting the selectivity in the production of ethylene and ethanol in CO_(2)*** findings reveal a volcano-like relationship between the*O binding energy and catalytic activity,with aluminum(Al)-doped Cu alloys situated at the *** strong Al–O bond facilitates C–O bond cleavage,thereby promoting C_(2)H_(4) *** grand canonical density functional theory(GCDFT)calculations,we elucidate the significance of strong oxygen affinity in enhancing*CO_(2) adsorption,leading to its activation into a bidentate-adsorbed ***,our results demonstrate that Al doping promotes C–C coupling by altering the adsorption mode of the key intermediate *OCCO,shifting it from a less favorable boattype to a more stable chair-type *** modification significantly contributes to the improved catalytic activity for C2+products on CuAl *** research provides a detailed mechanistic insight into the high activity and selectivity observed in CO_(2)RR to ethylene on CuAl catalysts,underscoring the critical role of metal oxophilicity in enhancing CO_(2)RR performance.

关键词： CO_(2)RR dilute alloy descriptor surface oxophilicity

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Multiphysics simulation and optimization of the in-situ beneficiation process of ilmenite minerals from lunar regolith

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Science China Earth Sciences 2025年第1期68卷 195-207页

作者： Peng ZHANG Xin LIU Guanghui LIU Wei DAI Hanzhe YANG Haibo ZHENG zhi WANG Ran niu Yifan BAI Yang ZHANG Chengbao LIU Ge YANG Junwei YANG Guang ZHANG Technology and Engineering Center for Space Utilization Chinese Academy of SciencesBeijing100094China Beijing Hegong Simulation Co. LtdBeijing100089China

The exploration and utilization of lunar resources have become the major objectives of future lunar exploration *** classified collection and processing of lunar minerals is the basic prerequisite for the in-situ exploration and utilization of lunar *** this study,we propose a scheme for in-situ separation of magnetic minerals from lunar soils using the dry magnetic separation *** scheme can realize the purpose of separating magnetic minerals from lunar regolith by altering the motion trajectory of lunar regolith particles with different magnetic *** modeling of the dry magnetic separation device is conducted,and the three-dimensional distribution of magnetic parameters is calculated and *** on the characterization and analysis of the Chang E-5's samples,the morphologies and physical parameters of lunar regolith particles are modeled and simulated.A discrete element simulation of the motion process of lunar regolith particles under multi-physical field conditions is performed,and the influences of key parameters on the beneficiation performance of lunar magnetic minerals are *** results indicate that optimal separation and beneficiation of lunar regolith particles can be achieved under specific conditions of magnetic field strength and drum ***,we analyze the effects of lunar weak gravity conditions and the charged nature of lunar particles on the beneficiation process,showing that these factors can obviously enhance the beneficiation process of lunar *** study demonstrates the feasibility of using the dry magnetic separation method for the beneficiation of magnetic minerals from lunar regolith,providing a theoretical basis for the scientific tasks of collecting,processing,and utilizing lunar mineral resources.

关键词： Lunar regolith In-situ resource utilization Magnetic separation Classified sampling

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单条林带防护作用区风速分布特征

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辽宁工程技术大学学报（自然科学版） 2006年第1期25卷 138-141页

作者：范志平曾德慧刘大勇余新晓牛健植中国科学院沈阳应用生态研究所大青沟沙地生态实验站辽宁沈阳110016 北京林业大学土木保持学院北京100083

为了揭示防护林带对旷野风速运动变化所产生的作用，通过空间多点观测，来研究单条林带防护作用区风速分布特征。结果表明，林带背风面2．5～19H范围内形成的风速降低区，是林带主要保护区和作用范围。其中，4～13H区域内由旷野最大风速... 详细信息

为了揭示防护林带对旷野风速运动变化所产生的作用，通过空间多点观测，来研究单条林带防护作用区风速分布特征。结果表明，林带背风面2．5～19H范围内形成的风速降低区，是林带主要保护区和作用范围。其中，4～13H区域内由旷野最大风速值6．4m／s降低至2．7～5．0m/s，风速降低幅度为29．7％～57．8％；13～19日区域内风速分布为5．0～6．0m／s，降低约6．3％～21．9％。在林带迎风面3．5H范围内形成的次降风区，风速降低了0．4～1．0m／s；林带附近乱流交换比较强烈，而且在林带两端处略偏向林带背风面有两个较大的动力速度增强区，风速超过7.0m／s，甚至达到7．5m／s。在林带的垂直方向不同区间的垂线上风述变化不同，林带的有效防护距离并不完全相同。据此提出林带“有效防护面积”的新概念，是表征单条林带防护作用火小的客观指标，能准确地表达农田防护林带的防护区域范围和防护程度。

关键词：林带风速分布特征有效防护面积

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花岗岩中钾长石巨晶成因及研究方法概述

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矿物岩石地球化学通报 2017年第2期36卷 345-353页

作者：侯国旺李红艳牛之建王栋中国地质科学院矿产资源研究所北京100037

钾长石巨晶在花岗岩中较为常见,对花岗岩的成因具有重要指示意义。本文介绍了花岗岩中钾长石巨晶的最新研究进展,重点梳理了钾长石巨晶的一些典型地质特征,讨论了钾长石巨晶的形成机制,详细介绍了关于钾长石巨晶原位地球化学研究的最新... 详细信息

钾长石巨晶在花岗岩中较为常见,对花岗岩的成因具有重要指示意义。本文介绍了花岗岩中钾长石巨晶的最新研究进展,重点梳理了钾长石巨晶的一些典型地质特征,讨论了钾长石巨晶的形成机制,详细介绍了关于钾长石巨晶原位地球化学研究的最新进展,提出了存在的问题及未来可能的一些研究方向。

关键词：钾长石巨晶结构加粗 Rb-Sr-Pb同位素 Ba振荡环带阴极发光岩浆混合

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Improved oxygen electrocatalysis at Fe N4 and Co N4 sites via construction of axial coordination

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Chinese Chemical Letters 2025年第2期36卷 482-487页

作者： Ze Zhang Lei Yang Jin-Ru Liu Hao Hu jian-Li Mi Chao Su Bei-Bei Xiao zhi-Min Ao School of Energy and Power Engineering Jiangsu University of Science and Technology Institute for Computation in Molecular and Materials Science School of Chemistry and Chemical Engineering Nanjing University of Science and Technology Institute for Advanced Materials School of Materials Science and Engineering Jiangsu University Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal University

The quest for efficient and durable catalysts using abundant resources has garnered significant interest in the field of bifunctional oxygen *** this contribution,we have designed a FeN4or CoN4embedded graphene-based bilayer as active layer and TMC3or TMN3doped graphene as supporting layer,named as FeN4/TMC3or FeN4/TMN3and CoN4/TMC3or CoN4/TMN3,wherein TM strands for transition *** on density functional theory calculations,our results demonstrate that the interaction formed between dual metal atoms in the bilayer interspace leads to the coordination environment altered from flat four-coordination to spatial five-coordination,further stabilizing the bilayer structure and impairing its affinity toward the O-containing *** to thermodynamic analysis,the bilayers of CoN4/CoN3,FeN4/FeC3,FeN4/CoC3,FeN4/NiC3,FeN4/ZnC3,FeN4/FeN3,FeN4/CrN3and FeN4/ZnN3are attractively promising for bifunctional oxygen electrocatalysis due to the small overpotential differenceΔη between oxygen reduction and oxygen evolution that are less than 1 *** functional theory calculations combined with machine learning analysis directly identify the key role played by the interbinding formed between bilayers,that boosts catalytic activity,which establishes a predictable framework for a fast screen for graphene-based bilayer vertical *** work opens up a new path for designing the efficient electrocatalysts via modification of coordination environment.

关键词： Density functional theory Machine learning Oxygen electrocatalysis Thermodynamic analysis

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Investigating the pharmacological basis and mechanisms of the anti-thrombotic effects of Paeoniae Radix Rubra， both pre- and post-stir-frying with rice wine

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Food Science and Human Wellness 2025年

作者： Jiaxu Zhang jian Guan Ajiao Hou Wenying niu Haixue Kuang Liu Yang Hai jiang Key Laboratory of Basic and Application Research of Beiyao， Heilongjiang University of Chinese Medicine， Ministry of Education

Paeoniae Radix Rubra (PRR) is a commonly used traditional Chinese medicine known for promoting blood circulation and alleviating pain. Stir-frying PRR with rice wine enhances its effectiveness in improving blood flow and resolving stasis. To explore the pharmacodynamic basis and mechanisms behind PRR's anti-thrombotic effects—both pre- and post-stir-frying—a comprehensive approach combining pharmacological research， metabolomics， and chemistry was employed. Fraction inter-cross validation experiments， pharmacological assessments， and metabolomic analyses confirm the efficacy of the fraction separation process. Wine-stir-fried PRR (WPRR) shows superior blood activation compared to PRR. PRR mainly affects the TCA cycle and sphingolipid metabolism pathways through its small molecules， enhancing coagulation and fibrinolysis systems' functionality. All the subdivided components of WPRR have anti-thrombotic effects， especially polysaccharides and oligosaccharides. WPRR improves thrombotic conditions in rat blood stasis by modulating arachidonic acid metabolism， TCA cycle， lipid status enhancement， and angiogenesis stimulation while regulating platelet adhesion and aggregation. In conclusion， compared with PRR， the main material basis for the blood-activating efficacy of WPRR has transformed from small molecule compounds to polysaccharide and oligosaccharide components. The action pathways of WPRR in exerting anti-thrombotic efficacy have increased. The polysaccharide components in WPRR might possess considerable potential for being developed into natural anti-thrombotic drugs.

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Investigating the pharmacological basis and mechanisms of the anti-thrombotic effects of Paeoniae Radix Rubra， both pre- and post-stir-frying with rice wine

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Food Science and Human Wellness 2025年

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Deterministic quantum state and gate teleportation between distant superconducting chips

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Science Bulletin 2025年第3期70卷 351-358页

作者： Jiawei Qiu Yang Liu Ling Hu Yukai Wu Jingjing niu Libo Zhang Wenhui Huang Yuanzhen Chen jian Li Song Liu Youpeng Zhong Luming Duan Dapeng Yu Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China International Quantum Academy Shenzhen 518048China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Center for Quantum Information Institute for Interdisciplinary Information SciencesTsinghua UniversityBeijing 100084China Department of Physics Southern University of Science and TechnologyShenzhen 518055China

Quantum teleportation is of both fundamental interest and great practical importance in quantum information *** date,quantum teleportation has been implemented in various physical systems,among which superconducting qubits are of particular practical significance as they emerge as a leading system to realize large-scale quantum ***,scaling up the number of superconducting qubits on a single chip becomes increasing challenging because of some emergent technical *** of quantum teleportation and remote computation over qubits on distant superconducting chips is a key quantum communication technology to scaling up the system through a distributed quantum computational ***,this goal has not been realized yet in experiments due to the technical challenges including making a quantum interconnect between distant superconducting chips and the inefficient transfer of flying microwave photons over the lossy *** we demonstrate deterministic teleportation of quantum states and entangling gates between distant superconducting chips connected by a 64-m-long cable bus featuring an ultralow loss of 0.32 dB/km at cryogenic temperatures,where high fidelity remote entanglement is generated via flying microwave *** work demonstrates a prime building block for distributed quantum computation with superconducting qubits,and opens up a new avenue for waveguide quantum electrodynamics and quantum photonics at microwave frequencies.

关键词： Superconducting circuits Quantum network Quantum computing Flying microwave photon

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森林植被对坡面土壤水蚀作用的动力学机理

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生态学报 2008年第10期28卷 5084-5094页

作者：张颖牛健植谢宝元余新晓朱建刚李维北京林业大学水土保持学院水土保持与荒漠化防治教育部重点实验室北京100083 黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨陵712100 中国海洋大学环境科学与工程学院 266100

水力侵蚀是目前世界上分布最广、危害也是最为普遍的一种土壤侵蚀类型。坡面土壤侵蚀主要是由雨滴击溅、坡面径流引起,而森林植被作为陆地上最重要的生态系统以其林冠层、林木茎杆、林地上富集的枯枝落叶层、根系层以及发育疏松而深厚... 详细信息

水力侵蚀是目前世界上分布最广、危害也是最为普遍的一种土壤侵蚀类型。坡面土壤侵蚀主要是由雨滴击溅、坡面径流引起,而森林植被作为陆地上最重要的生态系统以其林冠层、林木茎杆、林地上富集的枯枝落叶层、根系层以及发育疏松而深厚的土壤层截持和蓄储大气降水,发挥着其特有的水文生态功能,从多个角度影响降雨和坡面流的水力特性,在防治土壤侵蚀方面有其不可缺少的意义,然而目前对森林植被防治坡面土壤水蚀机理系统的研究还较少。系统的总结了森林植被各个垂直层次对坡面水蚀作用的动力学机理以及不同学者在此领域所做出的研究成果及此项研究的研究现状,并从以下几个方面指出了林地坡面水蚀作用动力学机理研究中尚存在的问题及发展方向:林冠对降雨重新分配出现林冠截持和干流等现象,降雨雨滴的大小、分布、降落速度和动能等性质发生变化,林冠层通过改变雨滴特性来影响坡面流水力特性,进而改变坡面流对坡面的侵蚀机理;森林植被茎干对径流的分散阻止作用,增大地表径流的阻力系数,茎干绕流现象对坡面土壤侵蚀的作用有正反两方面,林木在一定种植密度内,会使得泥沙起动流速减小,增加坡面侵蚀,因此应合理选择林木的种植密度才能起到减少坡面水蚀的作用;坡面流在枯落物层中流动并穿过枯落物层后下渗进入土壤的过程,类似于水流在多孔介质中的流动,枯落物的物理性质如分解程度、空隙度等的变化,引起水流流动的状态变化复杂,有必要应用渗流理论来深入研究以搞清其流动机理;根系层的存在能逐步改善土壤的内在特性,稳定表土层结构、提高土壤入渗性能使其抗侵蚀能力加强,植物根系层对坡面水蚀作用的研究是一个崭新的领域,需从土力学和植物根系影响土壤力学性质的角度研究土壤的抗侵蚀能力。

关键词：森林植被降雨水力侵蚀坡面流动力学

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Real-world evidence on the efficacy and safety of vonoprazanamoxicillin dual therapy for Helicobacter pylori treatment in elderly patients

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World Journal of Gastroenterology 2025年第1期31卷 68-78页

作者： Wen Gao Jing-Wen Li Hui Ye Xue-zhi Zhang jian-Xiang Liu Hong Cheng Department of Gastroenterology Peking University First HospitalBeijing 100034China School of Medicine Tsinghua MedicineTsinghua UniversityBeijing 100034China Department of Traditional Chinese Medicine and Integrative Medicine Peking University First HospitalBeijing 100034China

BACKGROUND A dual therapy regimen containing amoxicillin is a common treatment option for the eradication of Helicobacter pylori(***).While substantial research supports the efficacy and safety of vonoprazan and amoxicillin(VA)dual therapy in the general population,there is still a lack of studies specifically focusing on its safety in elderly *** To evaluate efficacy and safety of VA dual therapy as first-line or rescue treatment for *** in elderly *** As a real-world retrospective study,data were collected from elderly patients aged 60 years and above who accepted VA dual therapy(vonoprazan 20 mg twice daily+amoxicillin 1000 mg thrice daily for 14 days)for *** eradication in the Department of Gastroenterology at Peking University First Hospital between June 2020 and January *** status was evaluated by^(13)C-urease breath test 6 weeks after *** adverse events(AEs)during treatment were *** In total,401 cases were ***-one cases were excluded due to loss to follow-up,lack of re-examination,or unwillingness to take *** total of 380 included cases comprised 250 who received VA dual therapy as first-line treatment and 130 who received VA dual therapy as rescue *** was successfully eradicated in 239 cases(95.6%)in the first-line treatment group and 116 cases(89.2%)in the rescue treatment *** overall incidence of AEs was 9.5%for both ***,9.2%of patients experienced an AE in the first-line treatment group and 10.0%in the rescue treatment *** patients discontinued treatment due to AE,with a discontinuation rate of 1.3%.No serious AE *** The VA dual therapy regimen as a first-line treatment and a rescue therapy was effective and safe for elderly patients aged 60 and older.

关键词： Helicobacter pylori Vonoprazan Amoxicillin Dual therapy Elderly

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