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Unlocking single-atom catalysts via amorphous substrates

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Nano Research 2024年第5期17卷 3533-3546页

作者： Bohua Sun mingyuan xu Xiaoxia Li Baohong Zhang Rui Hao Xiaoyu Fan Binbin Jia Dingshun She School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China Zhengzhou Institute China University of Geosciences(Beijing)Zhengzhou 451283China College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China School of Chemistry Beihang UniversityBeijing 100191China Chinese Academy of Sciences(CAS)Key Laboratory of Nanosystem and Hierarchy Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China National Engineering Research Center of Nonferrous Metals Materials and Products for New EnergyChina GRINM Group Co.Ltd.Beijing 100088China

Single-atom catalysts(SACs)reveal great potential for application in catalysis due to their fully exposed active *** general,single atoms(SAs)and the coordination substrates need to have strong interactions or charge transfer to ensure the atomic dispersion,which requires the selection of a suitable substrate to stabilize the target *** studies have demonstrated that amorphous materials with abundant defects and coordinatively unsaturated sites can be used as substrates for more efficient capturing SAs,further enhancing the catalytic *** this review,we discuss recent research progress of SAs loaded on amorphous substrates for enhanced catalytic ***,we summarize the commonly used amorphous substrates for stabilizing ***,we present several advanced applications of amorphous SACs in the field of catalysis,including electrocatalysis and *** then,we also clarify the synergistic mechanism between SAs and amorphous substrate on catalytic ***,we summarize the challenges with our personal views and provide a critical outlook on how amorphous SACs continue to evolve.

关键词： single-atoms amorphous substrate synthetic strategy catalysis

Photo-promoted rapid reconstruction induced alterations in active site of Ag@amorphous NiFe hydroxides for enhanced oxygen evolution reaction

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Carbon Energy 2024年第9期6卷 210-220页

作者： Zhi Cai mingyuan xu Yanhong Li Xinyan Zhou Kexin Yin Lidong Li Binbin Jia Lin Guo Hewei Zhao School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijingChina School of Physics Beihang UniversityBeijingChina Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials College of Materials and Chemical EngineeringChina Three Gorges UniversityYichangHubeiChina

The dynamic surface self-reconstruction behavior in local structure correlates with oxygen evolution reaction(OER)performance,which has become an effective strategy for constructing the catalytic active ***,it remains a challenge to understand the mechanisms of reconstruction and to accomplish it fast and ***,we reported a photo-promoted rapid reconstruction(PRR)process on Ag nanoparticle-loaded amorphous Ni-Fe hydroxide nanosheets on carbon cloth for enhanced *** photogenerated holes generated by Ag in conjunction with the anodic potential contributed to a thorough reconstruction of the amorphous *** valence state of unsaturated coordinated Fe atoms,which serve as active sites,is significantly increased,while the corresponding crystalline substrate shows little *** different structural evolutions of amorphous and crystalline substrates during reconstruction lead to diverse pathways of *** PRR utilizing loaded noble metal nanoparticles can accelerate the generation of active species in the substrate and increase the electrical conductivity,which provides a new inspiration to develop efficient catalysts via reconstruction strategies.

关键词： Ag amorphous Ni-Fe hydroxide OER photo-promoted rapid reconstruction

Study on Two-phase Nanocrystalline Nd_(8.5)Fe_(74)Co_5Cu_1Nb_1Zr_3Cr_1B_(6.5)Permanent Magnet

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Journal of Materials Science & Technology 2004年第2期20卷 142-144页

作者： Jiansen NI, Hui xu, mingyuan ZHU, Qiang LI, Bangxin ZHOU and Yuanda DONGInstitute of Materials, Shanghai University, Shanghai 200072, China Institute of Materials Shanghai University Shanghai 200072 China

Nd8.5Fe74Co5Cu1Nb1Zr3Cr1B6.5 bonded magnets were prepared by melt-spun and subsequent heat treatment. Magnetic properties of Br=0.68 T,JHc=716 kA/m, (BH)max=77 kJ/m3 were achieved. The addition of Cr element shows to ... 详细信息

关键词： Nd-Fe-B Nanocrystalline Melt-spinning Magnetic properties

Laser-assisted Liposuction Combined with Masseter Dissection for Mid-Lower Facial Recontouring

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Chinese Journal of Plastic and Reconstructive Surgery 2020年第2期2卷 78-87,106页

作者： Rui LEI Wenjun WANG Xi CHEN Rizwan ALI mingyuan xu Yuming WANG Jinghong xu Department of Plastic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003Zhejiang ProvinceChina

Background Asian women usually view the oval face,with a beautiful curve and clear outline,as *** fat and bloated mid-lower face,with an undefined outline,takes away from what they perceive to be a beautiful *** only a bone but also soft tissue determine the shape of the mid-lower *** this article,we introduce a modified surgical method of soft tissue for mid-lower facial recontouring,which can improve the fat and undefined outline of the mid-lower face caused by benign masseter muscle hypertrophy and reduce subcutaneous fat accumulation at the same *** operative technique is simple and effective with few *** The surgical treatment of 36 patients who met the adaptation criteria was carried out by laser-assisted liposuction combined with masseter muscle *** patients were followed up postoperatively,and the surgical efficacy was evaluated on the basis of:the comparison of facial contours of patients before and after surgery,the change of masseter muscle thickness detected by B-ultrasound imaging,the satisfaction of patients with postoperative facial contour improvement,and the incidence of *** Between March 1,2018,and August 31,2019,36 patients with indications underwent this *** follow-up lasted 6 to 12 months postoperatively and demonstrated that all patients were satisfied with the postoperative results,of which 33 cases(91.7%)were very satisfied,and 3 cases(8.3%)were satisfied with the treatment and had obvious improvement of the appearance of their mid-lower ***,the average mandibular bigonial breadth was 138.6±8.3 mm,and the average thickness of the masseter muscle was 13.9±0.8 mm;the postoperative breadth was 123.3±7.7 mm,and the thickness was 10.1±0.2 *** average reduction of the lower face width and masseter thickness were 15.2±2.1 mm and 3.8±0.1 mm,*** complications occurred among the 36 *** The described method makes a great im

关键词： Lower beautiful treatment

Interspecies competition for nutrients between Prorocentrum donghaiense Lu and Skeletonema costatum(Grev.) Cleve in mesocosm experiments

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Acta Oceanologica Sinica 2009年第1期28卷 72-82页

作者： ZHU mingyuan xu Zongjun LI Ruixiang WANG Zongling SHI Xiaoyong College of Marine Life Science. Ocean University of China Qingdao 266003 China Key Laboratory of Marine Ecology and Environmental Science and Engineering of State Oceanic Administra- tion First Institute of Oceanograph） State Oceanic Administration Qingdao 266061 China College of Chemistry and Chemical Enginering Ocean University of China Qingdao 266003 China

Three mesocosm experiments were conducted in the East China Sea during blooms of Prorocentrum donghaiense Lu in May of 1998,2002 and 2003 to examine the role of nutrients in the formation of these harmful algae blooms（HABs）.The results showed that there was interspecies competition between *** and Skeletonema costatum（Grev.） *** cell number of *** and *** accounted for about 85% and 11% of the total cell number of phytoplankton respectively at the beginning of the experiment in May *** May 2002,at the beginning of the experiment,the cell number of *** accounted for 55%-66% of the total and *** accounted for 32%-42%.The density of *** and *** was over 95% and 1%-5% respectively in May *** results of these three mesocosm experiments showed that the dominant species in this specific community varied with different nutrient *** low-phosphate conditions,the dominant species was ***,while *** became dominant in phosphate-replete *** average growth rate（1.08 d-1） of *** in exponential growth phase was higher than that（0.39 d-1） of *** the mesocosm,*** predominated in the mesocosm by its rapid *** phosphorus was depleted,the cell number of *** dropped rapidly,while *** Lu decreased more *** results from mesocosm experiment may explain why：（1） *** bloom usually occurs in May,when phosphate concentration is low;（2） the bloom of *** appears in early spring and summer time,when nutrients increase with increasing Changjiang River（Yangtze River） runoff;（3） the bloom of *** is short and that of *** Lu can last more than a month in the East China Sea.

关键词： HABs,Fasl China Sea mesocosm experiment interspeeies eompetition

A new fragment scheme for full quantum mechanical calculations of metalloprotein energy and atomic forces: Metal-MFCC method

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A new fragment scheme for full quantum mechanical calculatio...

考虑消费者环境意识及企业有限理性的生产决策研究

第十三届全国量子化学会议

作者： mingyuan xu Tong Zhu John Zhang College of Chemistry and Molecular Engineering East China normal University Department of Chemistry New York University

Metal-MFCC method is a new Fragment scheme that focus on accuracy calculation of the metalloprotein energy and atomic forces for simulating the interaction between the metal ions and proteins at the QM level and improving the speed of Ab initio simulation. To test the accuracy of Metal-MFCC method, we carried out numerical studies to calculate the total energy and atomic forces of 17 metalloproteins using Metal-MFCC at M062 X/6-31G* level. The result of energy and atomic forces has shown great agreement with the full QM calculation for the metalloprotein that is binding with Zn, Cu, Cu cations. The Metal-MFCC method is computation efficient and linear-scaling with the atom number of the whole system.

关键词： Ab initio simulation Fragment method Metalloprotein

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系统工程理论与实践 2018年第10期38卷 2587-2599页

作者：郑君君王璐王向民许明嫄武汉大学经济与管理学院

在排污权上限-交易机制下,考虑消费者环境意识,研究企业分别在完全理性和有限理性假设下,如何进行传统产品和绿色产品的生产决策.通过对企业在上述假设下的两产品联合生产和单独生产的决策分析,得到结论：在企业完全理性假设下,当两产... 详细信息

在排污权上限-交易机制下,考虑消费者环境意识,研究企业分别在完全理性和有限理性假设下,如何进行传统产品和绿色产品的生产决策.通过对企业在上述假设下的两产品联合生产和单独生产的决策分析,得到结论：在企业完全理性假设下,当两产品联合生产时,存在绿色补贴区间使得随着消费者环境意识的增强,企业的最优总产量增加、总排污量减少;在企业完全理性假设下,当绿色产品和传统产品的产量不为零时,联合生产方式下的产量和排污量均小于单独生产,总利润大于单独生产;在企业有限理性假设下上述结果依然成立,不同的是两种生产方式下的期望产量差、期望排污量差和期望利润的差分别随着企业的有限理性程度的增强而减小;无论企业采取联合生产还是单独生产方式,有限理性假设下的期望总产量和排污量总是高于纳什均衡,期望利润总是低于纳什均衡,并且前者随着有限理性程度的增强而增加,后者随着有限理性程度的增强而减少.因此,当企业进行多品类产品生产时,联合生产比单独生产更有优势,但是这种优势会随着企业有限理性程度的增强而减弱,并且有限理性能够引发＂牛鞭效应＂,企业必须对决策过程中的有限理性引起重视.

关键词：有限理性消费者环境意识量子反应均衡生产决策

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碳纤维混凝土在恶劣环境中的变形破坏特性

混凝土 2024年第9期 61-66页

作者：许明远何新河南工业和信息化职业学院土木工程系河南焦作454000 中铁大桥勘测设计院集团有限公司湖北武汉430050

为了研究碳纤维混凝土在恶劣环境中(硫酸盐侵蚀环境下)的变形破坏特性,制备了含碳纤维(质量为水泥质量的1.0%)的混凝土试件,开展了变幅循环受压试验。结果表明:随着干湿循环周期的增加,试件并不会立刻呈现明显的劣化的趋势,在干湿循环6... 详细信息

为了研究碳纤维混凝土在恶劣环境中(硫酸盐侵蚀环境下)的变形破坏特性,制备了含碳纤维(质量为水泥质量的1.0%)的混凝土试件,开展了变幅循环受压试验。结果表明:随着干湿循环周期的增加,试件并不会立刻呈现明显的劣化的趋势,在干湿循环60次之前抵抗循环受压能力有所增加,之后开始下降,而在达到150次干湿循环后基本丧失抵抗变形破坏的能力;试件在循环荷载作用下的破坏是压密损伤和能量耗散逐渐积累的过程,而干湿循环周期的增加会逐渐增加耗散能转化率,最终改变了试件的储能机制。建立了基于累积残余应变且考虑初始损伤的损伤模型,该模型能够反映碳纤维混凝土在硫酸盐侵蚀环境下的损伤演化规律,具有一定的参考价值。

关键词：碳纤维混凝土硫酸盐侵蚀变形破坏循环受压

EGFR突变NSCLC的微环境特点及其与免疫治疗的关系

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中国肿瘤生物治疗杂志 2021年第8期28卷 839-843页

作者：徐铭远(综述) 王立峰(审阅) 南京大学医学院附属鼓楼医院肿瘤中心江苏南京210008

靶向治疗和免疫治疗在NSCLC治疗中发挥了重要作用。TKI可以显著延长EGFR突变患者的生存时间,然而对于发生TKI耐药患者的有效治疗方法有限,仍需要探索除化疗外的其他治疗手段。虽然免疫治疗能够改善NSCLC患者的无进展生存期和总生存期,... 详细信息

靶向治疗和免疫治疗在NSCLC治疗中发挥了重要作用。TKI可以显著延长EGFR突变患者的生存时间,然而对于发生TKI耐药患者的有效治疗方法有限,仍需要探索除化疗外的其他治疗手段。虽然免疫治疗能够改善NSCLC患者的无进展生存期和总生存期,但既往数据表明,EGFR突变NSCLC患者接受免疫治疗的效果仍不理想。本文综述了EGFR突变NSCLC患者肿瘤微环境特点及其与免疫治疗之间的关系,并探讨未来如何优化免疫治疗在这部分人群中的应用。

关键词： EGFR突变肿瘤微环境 NSCLC 免疫检查点抑制剂