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Boosting hydrocarbon conversion via Cu-doping induced oxygen vacancies on CeO2 in CO2 electroreduction

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Journal of Energy Chemistry 2025年第1期100卷 66-76页

作者： Lei xue Tong Shi Chenhui Han heng Zhang Fenrong Liu Haorun Li Yan wang Xiaojun Gu Shanghong Zeng Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials School of Chemistry and Chemical Engineering Inner Mongolia University State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Institute of Catalysis Department of Chemistry Zhejiang University National Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare Earths

Conversion of CO2back to hydrocarbons is the most direct way of closing the“carbon cycle”,and its significance is further enlarged if this process is driven by renewable energies such as ***,precisely controlling the product selectivity towards hydrocarbons against the competitive hydrogen evolution remains challenging,especially for Cu-based ***,we report a novel defect engineering strategy,by which Cu-doping-induced oxygen vacancies on CeO2nanorods were effectively created,with adjustable vacancy/Cu *** resulting optimum catalyst shows up to 79% catalytic current density to hydrocarbons （excluding CO）,with 49% faradaic efficiency to *** and density functional theory unveil that the ratio between oxygen vacancy and Cu affects significantly the formation of*CHO and activation of H2O,which leads to the following deep hydrogenation to *** findings may spur new insights for designing and developing more controllable chemical process relevant to CO2utilization.

关键词： Oxygen vacancy Hydrocarbon production Reaction mechanism

Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie wang Wei wang Xuheng Chen Junfang Bao Qiuyue Hao heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

Silk damping in scalar-induced gravitational waves: a novel probe for new physics

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 79-85页

作者： Yan-heng Yu Sai wang Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences School of Physics University of Chinese Academy of Sciences

Silk damping is well known in the study of cosmic microwave background（CMB） and accounts for suppression of the angular power spectrum of CMB on large angular multipoles. In this article, we study the effect of Silk damping on the scalar-induced gravitational waves（SIGWs）. Resulting from the dissipation of cosmic fluid, the Silk damping notably suppresses the energydensity spectrum of SIGWs on scales comparable to a diffusion scale at the decoupling time of weakly-interacting particles. The effect offers a novel observable for probing the underlying particle interaction, especially for those mediated by heavy gauge bosons beyond the standard model of particles. We anticipate that pulsar timing arrays are sensitive to gauge bosons with mass ～10～3-10～4 GeV, while space-and ground-based interferometers to those with mass ～10～7-1012GeV, leading to essential complements to on-going and future experiments of high-energy physics.

关键词： scalar-induced gravitational waves Silk damping new physics

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浅析企业交换网络中冗余链路技术

电脑知识与技术 2010年第35期6卷 9979-9981页

作者：王恒学广州白云工商技师学院计算机系

在企业交换网络中,我们通过STP/RSTP技术、链路聚合技术(Link Aggregation)技术和路由热备份HSRP技术形成网络的冗余链路,在传输链路故障时冗余链路将保证网络的正常运行,同时还提供负载均衡的作用,从而确保企业网络的高效和可靠地运转。

关键词：冗余链路生成树链路聚合热备份协议

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暗洞明做在欧家山隧道出口左洞的应用

价值工程 2018年第2期37卷 109-111页

作者：王学恒中铁十四局集团第二工程有限公司泰安271000

欧家山隧道左线采用单侧壁法单端掘进出洞施工对现行左线出洞施工不具备指导作用。欧家山隧道为本标段控制性工程,左线导坑ZK36+400~ZK36+403段拱部发生局部垮塌,洞内浅埋段围岩渗水后会造成塌方扩大化,对已开挖完成且为进行二衬施工的... 详细信息

欧家山隧道左线采用单侧壁法单端掘进出洞施工对现行左线出洞施工不具备指导作用。欧家山隧道为本标段控制性工程,左线导坑ZK36+400~ZK36+403段拱部发生局部垮塌,洞内浅埋段围岩渗水后会造成塌方扩大化,对已开挖完成且为进行二衬施工的段落(ZK36+367~ZK36+395)造成危害,存在极大的安全风险;同时,对出口段左线ZK36+395至出口明暗分界线ZK36+427段进行明挖施工,该部分土方可作为路基填料,有利于资源利用。通过本公司在山岭隧道施工中积累的经验,以及"暗洞明做"施工工艺较为成熟,出口段左线采取由ZK36+395至出口明暗分界线ZK36+427段进行明挖法施工的"暗洞明做"施工工艺。

关键词：暗洞明做隧道施工施工工艺

高效高精度动态静态组合块状食品称重分选系统

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食品与机械 2016年第10期32卷 89-93页

作者：韩乔生芦金石陶学恒王学俊姜超大连现代辅机开发制造有限公司辽宁大连116000 大连工业大学辽宁大连116000 国家海洋食品工程技术研究中心辽宁大连116000

将高效的动态传输和高精度的静态称重相结合,开发高效高精度的块状食品称重分选系统。该系统采用传输带完成物料的不间断传输,在称重前将物料依次排成多排,利用多个静态称重传感器依次完成物料间歇的静态称重,并依次落料后进行分类包装... 详细信息

将高效的动态传输和高精度的静态称重相结合,开发高效高精度的块状食品称重分选系统。该系统采用传输带完成物料的不间断传输,在称重前将物料依次排成多排,利用多个静态称重传感器依次完成物料间歇的静态称重,并依次落料后进行分类包装,完成静态称重和动态传输相结合的高效高精度的块状食品称重,称重分级的重量可根据实际需要调整,系统每分钟可称重150次,称重精度可达到0.1%,称重误差≤±0.002kg达到称重高精度标准。控制系统采用人机界面(HMI)和PLC相结合的控制方式,操作简便、可靠性强、可视化程度较高,同时带有远程控制接口,能够完成系统的远程监控。

关键词：静态称重动态称重块状食品称重

Regulation of graphdiyne-based nanozymes with enhanced oxidaselike activity by cobalt and nitrogen codoping

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Nano Research 2025年第1期18卷 21-29页

作者： Jiali Liu Xiaoli wang Yongfu Lian xue wang Xiuxiu wang Xingfa Gao Baoyun Sun Xihong Guo CAS Key Laboratory for Biomedical Effects of Nanomaterial&Nanosafety Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Laboratory of Theoretical and Computational Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

The development of nanozymes with excellent intrinsic oxidase-like activity and specificity has received increasing ***(GDY)could be a promising choice for designing nanozymes with enhanced oxidase(OXD)-like activity due to its unique structure and ***,Co-N-GDY with high OXD activity but no peroxidase(POD)activity was synthesized by codoping of cobalt(Co)and nitrogen(N)into GDY and compared with other GDY-based nanozymes(including GDY,Co-GDY,and N-GDY).Upon analyzing the doping effect of Co and N on the OXD-like and POD-like activities,we found that the combination of Co and N in GDY played a significant role in enhancing the OXD-like activity,and even reversed the POD-like activity of N-GDY to OXD-like activity of *** electrochemical experiment and the theoretical calculations provided an explanation for the mechanism and showed that the activity was closely linked to the reduction ability of O_(2) or H_(2)O_(2) on the nanozyme substrates,which was determined by the ratedetermining step of the catalytic reaction.

关键词： nanozymes oxidase-like activity graphdiyne heteroatom doping regulation

上颌反复扩缩前方牵引三维变化的锥形束CT分析

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北京大学学报（医学版） 2018年第4期50卷 685-693页

作者：王怡然周彦恒王雪东魏松刘伟涛北京大学口腔医学院.口腔医院正畸科国家口腔疾病临床医学研究中心口腔数字化医疗技术和材料国家工程实验室口腔数字医学北京市重点实验室北京100081 山东大学口腔医院儿童口腔科济南250012 北京赛德阳光口腔临床研究院北京100022

目的:利用锥形束计算机体层摄影术(cone-beam computed tomography,CBCT)探讨扩弓前牵对上颌标志点三维方向变化的影响,为骨性Ⅲ类错牙合畸形的早期治疗提供参考。方法:选择36例上颌后缩患者,使用随机化区组设计分为反复扩缩组(alternat... 详细信息

目的:利用锥形束计算机体层摄影术(cone-beam computed tomography,CBCT)探讨扩弓前牵对上颌标志点三维方向变化的影响,为骨性Ⅲ类错牙合畸形的早期治疗提供参考。方法:选择36例上颌后缩患者,使用随机化区组设计分为反复扩缩组(alternating rapid palatal expansion and constriction group,RPE/C)和对照组(rapid palatal expansion group,RPE),各18例。RPE/C按照上颌快速扩弓两周、缩弓两周的顺序重复扩缩共10周,最后两周扩弓后行面罩前方牵引,RPE上颌快速扩弓两周后行面罩前方牵引,分别于治疗前(T1)、扩弓后(T2)、前牵后(T3)拍摄CBCT。利用Mimics 10.01软件进行颌面部三维重建、上颌标志点定点和测量分析。结果:RPE/C治疗结束上齿槽座点(subspinale,A)前移(3.06±1.29)mm,RPE(2.16±1.27)mm,组间差异具有统计学意义(P0.05)。RPE/C上颌骨性标志点矢状向、冠状向和水平向变化趋势:扩弓T2-T1阶段前下、增宽变化,前牵T3-T2阶段前上、缩窄变化,总治疗T3-T1阶段前下、增宽变化,其余测量项目组间差异无统计学意义(P>0.05)。结论:上颌反复快速扩缩后前方牵引对早期治疗上颌后缩畸形有效;与上颌单次扩弓前方牵引的方法相比,上颌反复扩缩前方牵引对治疗中的上颌骨前移和对称性变化有利;CBCT在正畸测量分析中的应用需要进一步探讨。

关键词：上颌后缩腭扩张术口外牵引器锥形束计算机体层摄影术上颌标志点

Mimicking aneurysm in a patient with chronic occlusion of the left middle cerebral artery

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World Journal of Clinical Cases 2025年第3期13卷 20-23页

作者： xue-Jian wang Department of Neurosurgery Affiliated Hospital 2 of Nantong UniversityNantong 226000Jiangsu ProvinceChina

The chronic occlusion of intracranial arteries generally has no or mild clinical symptoms,and the clinical symptoms of acute cerebral artery occlusion are mostly manifested as severe cerebral infarction symptoms,which often make early diagnosis difficult,thus losing the best treatment *** cerebral infarction occurs,the consequences are difficult to *** is also an important reason for the high misdiagnosis rate and mortality of this *** this paper,the characteristics of the disease were analyzed to provide clinical reference.

关键词： Chronic occlusion Misdiagnose Arterial occlusion Middle cerebral artery occlusion Aneurysm