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Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong Sun Wenwen Guan Cailing Chen Chao Wu Xiaoling Liu Biao Meng Tao Chen Yu han Jun Wang Shibo Xi Yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Single atom catalyst Synergy effect Carbon catalyst Electrocatalysis

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Gravitational Field Excitation from the First Term of Quantum Wilson Loop

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Communications in Theoretical Physics 2006年第1X期46卷 77-86页

作者： shao Liang shao Dan shao Chang-Gui H. Noda CHEN Yi-han Department of Applied Physics Wuhan University of Science and Technology Wuhan 430081 China Department of Physics Jianghan University Wuhan 430056 China Institute of Theoretical Physics Hubei University Wuhan 430062 China Department of Mathematical Sciences Ibaraki University Mito 310-8512 Japan

In 4-dimensional R-gravity, using the linear and square terms of the expanding expression of the space-time connection, we calculate the possible curvature excitation （order k^4） of gravitational field, which is given by the first term of quantum Wilson loop （w） through two-point Green＇s function of the connection. At the same time using the tree diagram propagators of gravitons, the lowest order （k^4） correction to （w） is also calculated through the graviton self-energy in the term. Under the accuracy condition up to order k^4, we have obtained a complete expression of the excitation contributed from the leading term （w^（2））of （w）.

关键词： excitation of gravitational field graviton self-energy correction complete expression of excitation of order k^4 in (w^(2))

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Revolutionizing photothermal CO_(2)hydrogenation with ceria-based catalysts

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Nano Research 2025年第1期18卷 30-49页

作者： Zhaorui Zhang Xiao han Junhong Zhang Yunyun Dong Jinsheng Zhao Qian Xu ingqiang Zhang School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059China Institute for Catalysis Hokkaido UniversityN-21W-10Sapporo 001-0021Japan National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

In the context of achieving carbon neutrality,CO_(2)catalytic conversion technologies are effective in reducing atmospheric CO_(2)concentrations while simultaneously producing renewable *** approach is seen as a viable method for constructing a new carbon cycle,thereby effectively addressing the issue of global *** CO_(2)conversion has recently emerged as a promising research focus due to its high energy utilization efficiency,superior CO_(2)conversion,excellent product selectivity,mild operating conditions,low energy consumption and minimal operating *** oxide(CeO_(2))has been widely used in photothermal catalysis due to its unique chemical properties,particularly when used as a support material with supported metals,creating distinctive interfacial sites for catalytic *** an emerging star support in photothermal CO_(2)conversion,its contributions are equally significant and should not be ***,to our knowledge,there has been no comprehensive review of CeO_(2)applications in catalytic hydrogenation of CO_(2).In this paper,we summarize and discuss CeO_(2)-based materials for photothermal CO_(2)conversion to value-added *** research particularly focuses on the synthesis methods of CeO_(2)-supported catalysts,the history of CeO_(2)in photothermal catalysis,types of photothermal catalytic reactors,unique characterization methods for the photothermal catalysts and the photothermal CO_(2)hydrogenation reactions by CeO_(2)-based *** related to further challenges and future directions for photothermal CO_(2)hydrogenation are also provided.

关键词： CO_(2)neutrality hydrogenation photothermal catalysis ceria C1 chemistry

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Initial detection of the quorum sensing autoinducer activity in the rumen of goats in vivo and in vitro

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Journal of Integrative Agriculture 2016年第10期15卷 2343-2352页

作者： RAN Tao ZHOU Chuan-she XU Li-wei GENG mei-mei TAN Zhi-liang TANG shao-xun WANG Min han Xue-feng KANG Jin-he Key Laboratory for Agro-Ecological Processes in Subtropical Region/Hunan Research Center of Livestock & Poultry Sciences/ South-Central Experimental Station of Animal Nutrition and Feed Science Ministry of Agriculture/Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha 410125 P.R.China University of the Chinese Academy of Sciences Beijing 100049 P.R.China Hunan Co-Innovation Center of Animal Production Safety CICAPS Changsha 410128 P.R. China Hunan Co-Innovation Center for Utilization of Botanical Functional Ingredients Changsha 410128 P.R. China

Quorum sensing（QS） is a type of microbe-microbe communication system that is widespread among the microbial world, particularly among microorganisms that are symbiotic with plants and animals. Thereby, the cell-cell signalling is likely to occur in an anaerobic rumen environment, which is a complex microbial ecosystem. In this study, using six ruminally fistulated Liuyang black goats as experimental animals, we aimed to detect the activity of quorum sensing autoinducers（AI） both in vivo and in vitro and to clone the lux S gene that encoded autoinducer-2（AI-2） synthase of microbial samples that were collected from the rumen of goats. Neutral detergent fiber（NDF） and soluble starch were the two types of substrates that were used for in vitro fermentation. The fermented fluid samples were collected at 0, 2, 4, 6, 8, 12, 24, 36, and 48 h of incubation. The acyl-homoserine lactones（AHLs） activity was determined using gas chromatography-mass spectrometer（GC-MS） analysis. However, none of the rumen fluid extracts that were collected from the goat rumen showed the same or similar fragmentation pattern to AHLs standards. Meanwhile, the AI-2 activity, assayed using a Vibrio harveyi BB170 bioassay, was negative in all samples that were collected from the goat rumen and from in vitro fermentation fluids. Our results indicated that the activities of AHLs and AI-2 were not detected in the ruminal contents from six goats and in ruminal fluids obtained from in vitro fermentation at different sampling time-points. However, the homologues of lux S in Prevotella ruminicola were cloned from in vivo and in vitro ruminal fluids. We concluded that AHLs and AI-2 could not be detected in in vivo and in vitro ruminal fluids of goats using the current detection techniques under current dietary conditions. However, the microbes that inhabited the goat rumen had the potential ability to secrete AI-2 signaling molecules and to communicate with each other via AI-2-mediated QS because of the prese

关键词： quorum sensing AHLs AI-2 lux S rumen bacteria goat

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Unraveling the Mechanisms of Memory Extinction

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Neuroscience Bulletin 2018年第2期34卷 385-388页

作者： shao-Ling han Tian-Le Xu Collaborative Innovation Center for Brain Science Department of Anatomy and Physiology Shanghai Jiao Tong University School of Medicine

Memory is a crucial biological function conserved across almost all *** established and consolidated,a memory is considered stable and long-lasting unless it is disrupted or manipulated by behavioral,physical,or chemi...

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Evolution of plasticized MnO–Al2O3–SiO2-based nonmetallic inclusion in 18wt%Cr-8wt% Ni stainless steel and its properties during soaking process

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International Journal of Minerals,Metallurgy and Materials 2020年第3期27卷 328-339页

作者： Jing Guo Xing-run Chen shao-wei han Yan Yan han-jie Guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Jiuquan Iron and Steel Group Corporation Jiayuguan 735100China Beijing Shougang Co.Ltd. Qian'an 064400China

The properties of MnO–Al2O3–SiO2-based plasticized inclusion are likely to change during soaking process due to its low melting point. In this study, the evolution of the MnO–Al2O3–SiO2-based inclusion of 18 wt%Cr-8 wt%Ni stainless steel under isothermal soaking process at 1250°C for different times was investigated by laboratory-scale experiments and thermodynamic analysis. The results showed that the inclusion population density increased at the first stage and then decreased while their average size first decreased and then increased. In addition, almost no Cr2O3-concentrated regions existed within the inclusion before soaking, but more and more Cr2O3 precipitates were formed during soaking. Furthermore, the plasticity of the inclusion deteriorated due to a decrease in the amount of liquid phase and an increase in the high-melting-pointphase MnO–Cr2O3 spinel after the soaking process. In-situ observations by high-temperature confocal laser scanning microscopy(CLSM) confirmed that liquid phases were produced in the inclusions and the inclusions grew rather quickly during the soaking process. Both the experimental results and thermodynamic analysis conclude that there are three routes for inclusion evolution during the soaking process. In particular, Ostwald ripening plays an important role in the inclusion evolution, i.e., MnO–Al2O3–SiO2-based inclusions grow by absorbing the newly precipitated smaller-size MnO–Cr2O3 inclusions.

关键词： nonmetallic inclusion soaking process Ostwald ripening stainless steel

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Joint Association of Metabolic Health and Obesity with Ten-Year Risk of Cardiovascular Disease among Chinese Adults

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Biomedical and Environmental Sciences 2022年第1期35卷 13-21页

作者： LIU Jun Ting YAO Hong Yan YU Shi Cheng LIU Jian Jun ZHU Guang Jin han shao mei XU Tao Chinese Center for Disease Control and Prevention Beijing 102206China Capital Institute of Pediatrics Beijing 100020China Department of Physiopathology Institute of Basic Medical SciencesChinese Academy of Medical Sciences&School of Basic Medicine Peking Union Medical CollegeBeijing 100006China Department of Epidemiology and Statistics Institute of Basic Medical SciencesChinese Academy of Medical Sciences&School of Basic Medicine Peking Union Medical CollegeBeijing 100005China

Objective This study aims to investigate the association of metabolic phenotypes that are jointly determined by body mass index(BMI)or fat mass percentage and metabolic health status with the tenyear risk of cardiovascular disease(CVD)among Chinese *** Data were obtained from a cross-sectional *** and body fat mass percentage(FMP)combined with the metabolic status were used to define metabolic *** linear regression and logistic regression were used to examine the effects of metabolic phenotypes on CVD *** A total of 13,239 adults aged 34-75 years were included in this *** with the metabolically healthy non-obese(MHNO)phenotype,the metabolically unhealthy non-obese(MUNO)and metabolically unhealthy obese(MUO)phenotypes defined by BMI showed a higher CVD risk[odds ratio,OR(95% confidence interval,CI):2.34(1.89-2.89),3.45(2.50-4.75),respectively],after adjusting for the *** MUNO and MUO phenotypes defined by FMP showed a higher CVD risk[OR(95%CI):2.31(1.85-2.88),2.63(1.98-3.48),respectively]than the MHNO *** metabolically healthy obese phenotype,regardless of being defined by BMI or FMP,showed no CVD risk compared with the MHNO *** General obesity without central obesity does not increase CVD risk in metabolically healthy *** might be a more meaningful factor for the evaluation of the association of obesity with CVD *** and metabolic status have a synergistic effect on CVD risk.

关键词： Body mass index Fat mass Obesity Metabolic health Metabolic phenotype Cardiovascular risk

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Effect of Si/Si_(1-y)C_(y)/Si Barriers on the Characteristics of Sil-xGex/Si Resonant Tunneling Structures

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Chinese Physics Letters 2000年第11期17卷 844-846页

作者： han Ping CHENG Xue-mei Department of Physics Nanjing UniversityNanjing 210093 Masao SakurabaYoung-Cheon JeongTakashi MatsuuraJunichi Murota Research Institute of Electrical CommunicationTohoku University 2-1-1 KatahiraAoba-kuSendai 980-8577Japan

P-type double barrier resonant tunneling diodes (RTD) with the single Si0.6Ge0.4 quantum well and double Si0.6Ge0.4spacer have been realized by using an ultra clean low-pressure chemical vapor deposition system. The effect of Si_(1-y)C_(y) layer on the characteristics of the devices was shown by comparing the current-voltage (I-V) characteristics of RTD’s of the barriers of Si layers with that of Si/ Si_(1-y)C_(y)/Si structures. The peak voltage was gradually increased and the resonant current decreased obviously with increasing C content in the Si/ Si_(1-y)C_(y)/Si barriers. The origin of the phenomena above can be attributed to the C related deep acceptor levels in the Si/ Si_(1-y)C_(y)/Si barriers. The possible mechanism for the observed I- V characteristics was shown more clearly by increasing C content to 3% and changing the thicknesses of Si and Si_(1-y)C_(y) layers in the Si/Si_(1-y)C_(y)/Si barriers.

关键词： Si/Si resonant Tunnel

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Analysis of the motion of small-scale ellipsoidal particles in a horizontal laminar flow field

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Particuology 2018年第5期16卷 44-51页

作者： Lin Yang Ji Zhang han Yuan Ning mei Marine Engineering College of Engineering Ocean University of ChinaQingdao 266100China

A particle movement model for a horizontal laminar flow field was established in this study,using a modified Basset-Boussinesq-Oseen equation for multiphase fluid dynamics,The motion of ellipsoidal and spherical particles in this flow field was compared to determine the differences in entrainment of ellipsoidal versus spherical *** theoretical results indicate that ellipsoidal particles move more rapidly and smoothly within the fluid than spherical particles under the same ***,this feature is enhanced,as the ellipsoidal degree of the particle *** on a dimensional analysis,flow experiments were carried out to verify the behavior of ellipsoidal versus spherical particles in *** our theoretical and experimental results show that ellipsoidal particles approach the fluid velocity more quickly than spherical *** work would need to address effects of velocity gradients and rotation on particle behavior.

关键词： Solid-liquid two-phase flow Horizontal laminar flow Ellipsoidal particle Ellipsoidal degree Spherical particle Velocity distribution

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Combined detection of serum tumor markers for differential diagnosis of solid lesions located at the pancreatic head

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Hepatobiliary & Pancreatic Diseases International 2007年第6期6卷 641-645页

作者： Liao, Quan Zhao, Yu-Pei Yang, Ying-Chi Li, Li-Jun Long, Xiao han, shao-mei Beijing Union Med Coll Hosp Dept Gen Surg Beijing 100730 Peoples R China

BACKGROUND: The differential diagnosis of solid lesions located at the pancreatic head is very important for choosing therapies and setting up surgical tactics. This study was designed to evaluate the clinical significance of combined measurement of multiple serum tumor markers and the application of the receiver-operating characteristic (ROC) curves in the differential diagnosis of solid lesions located at the pancreatic head. METHODS: The serum levels of CA19-9, CA242, CA50 and carcinoembryonic antigen (CEA) in 112 patients with carcinoma of the pancreatic head and 38 patients with focal chronic pancreatitis in the pancreatic head were measured with ELISA. The sensitivity, specificity, positive likelihood ratio (PLR) and negative likelihood ratio (NLR) of the four serum tumor markers were calculated. The ROC curves for the four serum tumor markers were constructed and the area under the curve (AUC) was calculated. RESULTS: The AUCs of CA19-9, CA242, CA50 and CEA were 0.805, 0.749, 0.738 and 0.705; the PLRs were 1.91, 3.43, 5.09 and 5.46; and the NLRs were 0.41, 0.56, 0.59 and 0.71, respectively. Combined measurements increased the diagnostic specificity, and parallel combined testing increased the diagnostic sensitivity. CONCLUSIONS: Combined measurement of serum tumor markers CA19-9, CA242, CA50 and CEA is valuable in differential diagnosis of solid lesions located at the pancreatic head, and CA19-9 has the best diagnostic ability. Combined measurements can increase the specificity of diagnosis. Evaluation with the ROC curve is better than the sensitivity or specificity alone and the results are more integrated and objective.

关键词： pancreatic neoplasm tumor markers ROC curve differential diagnosis

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