检索结果-南通市图书馆

Single-atom site catalysts for environmental catalysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2020年第12期13卷 3165-3182页

作者： ningqiang zhang Chenliang Ye Han Yan Lingcong Li Hong He Dingsheng Wang Yadong Li Department of Chemistry Tsinghua UniversityBeijing100084China Key Laboratory of Beijing on Regional Air Pollution Control and Beijing Key Laboratory for Green Catalysis and Separation Beijing University of TechnologyBeijing100124China Institute for Catalysis Hokkaido UniversitySapporoHokkaido001-0021Japan

In recent decades,the environmental protection and long-term sustainability have become the focus of attention due to the increasing pollution generated by the intense *** overcome these issues,environmental catalysis has increasingly been used to solve the negative impact of pollutants emission on the global environment and human *** platinum-metal-group(PGM)materials are commonly utilized as the state-of-the-art catalysts to eliminate gaseous pollutants but large quantities of PGMs are *** comparison,single-atom site catalysts(SACs)have attracted much attention in catalysis owing to their 100%atom efficiency and unique catalytic performances towards various *** the past decade,we have witnessed burgeoning interests of SACs in heterogeneous ***,to the best of our knowledge,the systematic summary and analysis of SACs in catalytic elimination of environmental pollutants has not yet been *** this paper,we summarize and discuss the environmental catalysis applications of *** focus was paid to automotive and stationary emission control,including model reaction(CO oxidation,NO reduction and hydrocarbon oxidation),overall reaction(three-way catalytic and diesel oxidation reaction),elimination of volatile organic compounds(formaldehyde,benzene,and toluene),and removal/decomposition of other pollutants(Hg0 and SO3).Perspectives related to further challenges,directions and design strategies of single-atom site catalysts in environmental catalysis were also provided.

关键词： single-atom site catalysts environmental catalysis volatile organic compounds CO catalytic oxidation NO selective reduction hydrocarbon oxidation

Use of rare earth elements in single-atom site catalysis:A critical review——Commemorating the 100th anniversary of the birth of Academician Guangxian Xu

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2021年第3期39卷 233-242,I0001页

作者： ningqiang zhang Han Yan Lingcong Li Rui Wu Liyun Song Guizhen zhang Wenjun Liang Hong He Key Laboratory of Beijing on Regional Air Pollution Control and Beijing Key Laboratory for Green Catalysis and Separation Beijing University of TechnologyBeijing 100124China Department of Chemistry Tsinghua UniversityBeijing 100084China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Rare earth metals are strategic resources with potential applications in optics,metallurgy and *** recent years,single-atom site catalysts(SASCs) have attracted increasing attention owing to their 100%atom efficiency and unique catalytic *** the past decade,rare earth elements,including rare earth metals and their oxides,have shown great potential in ***,systematic analyses of data are still *** this mini-review,the use of rare earth metals and their oxides in SASCs was summarized and the results are discussed.A particular focus was paid to the synthetic strategies,characterization of rare earth-containing SASCs,and applications as catalysis supports,promoters and active *** issues faced by rare-earth metals and their oxides in SASCs,as well as future prospects were also provided.

关键词： Rare earth catalysis Single-atom site catalysis Synthetic strategies Characterization Applications

An insight into the enhanced mechanism of Ru–MoO_(2)interfacial chemical bonding for hydrogen evolution reaction in alkaline media

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第2期16卷 2230-2235页

作者： Ying Yuan Wei Han Chenchen zhang Qi Sun Yingxin Hao Jiamin Zhao Jinsheng Zhao Xiujuan Zhong ningqiang zhang School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059China National Energy R&D Center for Petroleum Refining Technology Research Institute of Petroleum ProcessingChina Petroleum&Chemical Corporation(SINOPEC)Beijing 100083China Institute for Catalysis Hokkaido UniversityN-21W-10SapporoHokkaido 001-0021Japan

An effective strategy was proposed to control the formation of the interfacial bonding between Ru and molybdenum oxide support to stabilize the Ru atoms with the aim to enhance the hydrogen evolution reaction(HER)activity of the resultant catalysts in alkaline *** different interfacial chemical bonds,including Ru–O,Ru–O–Mo,and mixed Ru–Mo/Ru–O–Mo,were prepared using an induced activation strategy by controlling the composition of reducing agents in the calcination *** the regulation mechanism of the interfacial chemical bonds in molybdenum oxide supported Ru catalysts for optimizing HER activity was investigated by density functional theory(DFT)and experimental *** found that a controlled interfacial chemical Ru–O–Mo bonding in Ru-MoO_(2)/C manifests a 12-fold activity increase in catalyzing the hydrogen evolution reaction relative to the conventional metal/metal oxide catalyst(Ru-O-MoO_(2)/C).In a bifunctional effect,the interfacial chemical Ru-O-Mo sites promoted the dissociation of water and the production of hydrogen intermediates that were then adsorbed on the nearby Ru surfaces and recombined into molecular *** compared,the nearby Ru surfaces in Ru–Mo bonding have weak adsorption capacity for the generation of these hydrogen intermediates,resulting in a 5-fold increase HER activity for Ru-Mo-MoO_(2)/C catalyst compared with Ru-O-MoO_(2)/C.

关键词： interfacial chemical bonds alkaline media hydrogen evolution reaction Ru–O–Mo

In-situ DRIFT assessment on strengthening effect of cerium over FeO_(x)/TiO_(2)catalyst for selective catalytic reduction of NO_(x) with NH_(3)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2021年第5期39卷 526-531页

作者： Hossein Chitsazi ningqiang zhang Lingcong Li Xiaojun Liu Rui Wu Junda He Liyun Song Hong He Beijing Key Laboratory for Green Catalysis and Separation and Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of TechnologyBeijing 100124China College of Chemistry Chemical Engineering and Materials ScienceInstitute of Molecular and Nano ScienceShandong Normal UniversityJinan 250014China Collaborative Innovation Center of Electric Vehicle in Beijing Beijing 100081China

Fe-based catalysts have a great potential to be used for selective catalytic reduction(SCR)of NO_(x)with NH3 reaction due to their low cost,nontoxicity and excellent catalytic *** aim of this paper is to investigate Ce doping effect on activity of NH_(3)-SCR over the FeO_(x)/TiO_(2)***-situ diffuse reflectance infrared fourier transform(DRIFT)technology was utilized to verity the adsorbed species on the surface of FeO_(x)/TiO_(2)and FeO_(x)-CeO_(2)/TiO_(2)*** respect to the obtained results,among the four catalysts studied,the FeO_(x)-CeO_(2)/TiO_(2)with the FeO_(x)/CeO_(2)ratio of 3/8 shows the best NO conversion more than 98%in the temperature range of 230—350℃,The active centers for NH_(3)adsorption and activation are assigned to Lewis acid sites over the FeO_(x)-CeO_(2)/TiO_(2)and monodentate nitrates can act as the key intermediate in the ***,both of Langmuir-Hinshelwood and Eley-Rideal mechanisms are observed over the FeO_(x)-CeO_(2)/TiO_(2)catalysts in the SCR.

关键词： Fe-based catalysts Ce doping Selective catalytic reduction In-situ DRIFT Rare earths

Unraveling the advantages of Pd/CeO_(2)single-atom catalysts in the NO+CO reaction by model catalysts

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 8882-8892页

作者： Qian Xu Xingwang Cheng ningqiang zhang Yi Tu Lihui Wu Haibin Pan Jun Hu Honghe Ding Junfa Zhu Yadong Li Department of Chemistry Tsinghua UniversityBeijing 100084China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241002China

Selective catalytic reduction of NO by CO is challenging in environmental catalysis but attractive owing to the advantage of simultaneous elimination of NO and ***,model catalysts consisting of Pd nanoparticles(NPs)and single-atom Pd supported on a CeO_(2)(111)film grown on Cu(111)(denoted as Pd NPs/CeO_(2)and Pd_(1)/CeO_(2),respectively)were successfully prepared and characterized by synchrotron radiation photoemission spectroscopy(SRPES)and infrared reflection absorption spectroscopy(IRAS).The NO+CO adsorption/reaction on the Pd_(1)/CeO_(2)and Pd NPs/CeO_(2)catalysts were carefully investigated using SRPES,temperature-programmed desorption(TPD),and *** is found that the reaction products on both model catalysts are in good agreement with those on real catalysts,demonstrating the good reliability of using these model catalysts to study the reaction mechanism of the NO+CO *** the Pd NPs/CeO_(2)surface,N_(2)is formed by the combination of atomic N coming from the dissociation of NO on Pd NPs at higher temperatures.N_(2)O formation occurs probably via chemisorbed NO combined with atomic N on the *** on the single-atom Pd_(1)/CeO_(2)surface,no N_(2)O is *** 100%N_(2)selectivity may stem from the formation of O-N-N-O^(*)intermediate on the *** this study,direct experimental evidence for the reaction mechanisms of the NO+CO reaction is provided,which supports the previous density functional theory(DFT)calculations.

关键词： NO+CO reaction Pd/CeO_(2) model catalysts reaction mechanisms

Direct observation of oxygen vacancy formation and migration over ceria surface by in situ environmental transmission electron microscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第4期42卷 676-682页

作者： Dawei Pang Wei Li ningqiang zhang Hong He Shengcheng Mao Yanhui Chen Liwei Cao Chong Li Ang Li Xiaodong Han Beijing Key Laboratory of Solid Microstructure and Properties Department of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Beijing Key Laboratory for Green Catalysis and Separation The Faculty of Environment and LifeBeijing University of TechnologyBeijing10124China International Joint Research Laboratory for Quantum Functional Materials of Henan School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou450001China

The extremely high structural tolerance of ceria to oxygen vacancies(Ov)has made it a desirable catalytic material for the hydrocarbon oxidation to chemicals and pharmaceuticals and the reduction of gaseous *** is proposed that the formation and diffusion of Ov originate from its outstanding reduction ***,the formation and diffusion process of Ov over the surface of ceria at the atomic level is still ***,the structural and valence evolution of CeO_(2)(111)surfaces in reductive,oxidative and vacuum environments from room temperature up to 700℃was studied with in situ aberration-corrected environmental transmission electron microscopy(ETEM)*** is found to form under a high vacuum at elevated temperatures;however,the surface can recover to the initial state through the adsorption of oxygen atoms in an oxygen-contained ***,in hydrogen environment,the step-CeO_(2)(111)surface is not stable at elevated temperatures;thus,the steps tend to be eliminated with increasing *** with first-principles density function calculations(DFT),it is proposed that O-terminated surfaces would develop in a hypoxic environment due to the dynamic diffusion of Ov from the outer surface to the ***,in a reductive environment,H2 facilitates the formation and diffusion of Ov while Ce-terminated surfaces *** results reveal dynamic atomic-scale interplay between the nanoceria surface and gas,thereby providing fundamental insights into the Ov-dependent reaction of nano-CeO_(2) during catalytic processes.

关键词： Ceria Direct observation In situ ETEM Oxygen vacancy Density function calculations Rareearths

在线全文

学校读者我要写书评

暂无评论

单原子催化剂的研究进展

中国稀土学报 2018年第5期36卷 513-532页

作者：张宁强李伶聪黄星张桂臻何洪北京工业大学区域大气复合污染防治北京市重点实验室北京工业大学绿色催化与分离北京市重点实验室北京100124 北京电动车辆协同创新中心北京100081

单原子催化剂兼具均相催化剂的活性中心和多相催化剂结构稳定易分离的特点,是实现统一的"大"催化理论非常重要的突破口。由于其优越的催化性能在工业催化中具有巨大的应用潜力。基于"单原子催化"概念提出以来国内外单原子催化剂的研究进... 详细信息

单原子催化剂兼具均相催化剂的活性中心和多相催化剂结构稳定易分离的特点,是实现统一的"大"催化理论非常重要的突破口。由于其优越的催化性能在工业催化中具有巨大的应用潜力。基于"单原子催化"概念提出以来国内外单原子催化剂的研究进展,以不同的活性组分进行分类对单原子催化剂进行归纳总结。系统地介绍了单原子催化剂的制备方法以及应用研究进展,并展望了单原子催化剂的发展前景,以期对于进一步构筑具有特定结构和催化功能的单原子催化剂的研究起到积极的促进作用。

关键词：单原子催化活性组分制备方法应用稀土

在线全文

学校读者我要写书评

暂无评论

葫芦[n]脲应用研究进展

化学进展 2015年第2期27卷 192-211页

作者：张宁强黄晓玲班琳哲苏海全内蒙古大学化学化工学院呼和浩特010021

葫芦[n]脲(CB[n]简称CB)及其衍生物是由n个甘脲单元连接而成的大环主体分子,因其特殊的结构和分子识别性能,而受到广泛关注。以共价或非共价的方法,葫芦[n]脲可以构筑出各种功能的纳米超分子组装体,而且还可以赋予超分子组装体很多新颖... 详细信息

葫芦[n]脲(CB[n]简称CB)及其衍生物是由n个甘脲单元连接而成的大环主体分子,因其特殊的结构和分子识别性能,而受到广泛关注。以共价或非共价的方法,葫芦[n]脲可以构筑出各种功能的纳米超分子组装体,而且还可以赋予超分子组装体很多新颖的物理化学特性,使其在反应容器、表面活性剂、载体、囊泡、分子开关、离子选择性电极等方面展现出极大的应用潜力。本文综述了近年来基于葫芦[n]脲纳米超分子组装体的构筑及应用研究进展,并展望了葫芦[n]脲化合物的发展前景,以期对于进一步构筑具有特定结构和功能的葫芦[n]脲纳米超分子组装体的研究起到积极的促进作用。

关键词：葫芦[n]脲超分子组装体应用

Glucocorticoid receptor signaling in the brain and its involvement in cognitive function

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2520-2537页

作者： Chonglin Su Taiqi Huang Meiyu zhang Yanyu zhang Yan Zeng Xingxing Chen Brain Science and Advanced Technology Institute Hubei Province Key Laboratory of Occupational Hazard Identification and ControlSchool of MedicineWuhan University of Science and TechnologyWuhanHubei ProvinceChina

The hypothalamic-pituitary-adrenal axis regulates the secretion of glucoco rticoids in response to environmental *** the brain,a nuclear receptor transcription fa ctor,the glucocorticoid recepto r,is an important component of the hypothalamicpituitary-a d renal axis's negative feedback loop and plays a key role in regulating cognitive equilibrium and *** glucoco rticoid receptor influences cognitive processes,including glutamate neurotransmission,calcium signaling,and the activation of brain-derived neurotrophic factor-mediated pathways,through a combination of genomic and non-genomic *** interactions within the central nervous system can alter the expression and activity of the glucocorticoid receptor,there by affecting the hypothalamic-pituitary-a d renal axis and stress-related cognitive *** appropriate level of glucocorticoid receptor expression can improve cognitive function,while excessive glucocorticoid receptors or long-term exposure to glucoco rticoids may lead to cognitive *** with cognitive impairment-associated diseases,such as Alzheimer's disease,aging,depression,Parkinson's disease,Huntington's disease,stroke,and addiction,often present with dysregulation of the hypothalamic-pituitary-adrenal axis and glucocorticoid receptor *** review provides a comprehensive overview of the functions of the glucoco rticoid receptor in the hypothalamic-pituitary-a d renal axis and cognitive *** emphasizes that appropriate glucocorticoid receptor signaling fa cilitates learning and memory,while its dysregulation can lead to cognitive *** provides clues about how glucocorticoid receptor signaling can be targeted to ove rcome cognitive disability-related disorders.

关键词： brain-derived neurotrophic factor calcium signaling glucocorticoid receptor glucocorticoid glutamate transmission hypothalamic-pituitary-adrenal axis long-term potentiation neurocognitive disorders neuroplasticity stress