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Theory-guided construction of electron-deficient sites via removal of lattice oxygen for the boosted electrocatalytic synthesis of ammonia

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Nano Research 2021年第5期14卷 1457-1464页

作者： Li Zhang Shilong Jiao Xin Tan Yuliang Yuan Yu Xiang Yu-Jia Zeng Jingyi Qiu Ping Peng sean C.smith Hongwen Huang College of Materials Science and Engineering Hunan UniversityChangsha410082China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen518061China Integrated Materials Design Laboratory Department of Applied MathematicsResearch School of PhysicsThe Australian National UniversityCanberraACT2601Australia Research Institute of Chemical Defense Beijing100191China

Rational design of catalytic sites to activate the inert N≡N bond is of paramount importance to advance N2 electroreduction. Here, guided by the theoretical predictions, we construct a NiFe layered double hydroxide (NiFe-LDH) nanosheet catalyst with a high density of electron-deficient sites, which were achieved by introducing oxygen vacancies in NiFe-LDH. Density functional theory calculations indicate that the electron-deficient sites show a much lower energy barrier (0.76 eV) for the potential determining step compared with that of the pristine NiFe-LDH (2.02 eV). Benefiting from this, the NiFe-LDH with oxygen vacancies exhibits the greatly improved electrocatalytic activity, presenting a high NH3 yield rate of 19.44 µg·h−1·mgcat−1, Faradaic efficiency of 19.41% at −0.20 V vs. reversible hydrogen electrode (RHE) in 0.1 M KOH electrolyte, as well as the outstanding stability. The present work not only provides an active electrocatalyst toward N2 reduction but also offers a facile strategy to boost the N2 reduction.

关键词： nitrogen reduction density functional theory oxygen vacancies electron-deficient sites

Dimensionality engineering of metal halide perovskites

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Frontiers of Optoelectronics 2020年第3期13卷 196-224页

作者： Rashad FKAHWAGI sean TTHORNTON Ben smith Ghada LKOLEILAT Department of Chemical Engincering Dalhousic UniversityHalifaxNova ScotiaB3J IZ1Canada

Metal halide perovskites are a class of materials that are ideal for photodetectors and solar cells due to their excellent optoelectronic *** low-cost and low temperature synthesis have made them attractive for extensive research aimed at revolutionizing the semiconductor *** rich chemistry of metal halide perovskites allows compositional engineering resulting in facile tuning of the desired optoelectronic ***,using different experimental synth-esis and deposition techniques such as solution processing,chemical vapor deposition and hot-injection methods,the dimensionality of the perovskites can be altered from 3D to 0D,each structure opening a new realm of applications due to their unique *** engineering includes both morphological engineering reducing the thickness of 3D perovskite into atomically thin films and molecular engineering--incorporating long-chain organic cations into the perovskite mixture and changing the composition at the molecular *** optoelectronic properties of the perovskite structure including its band gap,binding energy and carrier mobility depend on both its composition and *** plethora of different photodetectors and solar cells that have been made with different compositions and dimensions of perovskite will be reviewed *** will conclude our review by discussing the kinetics and dynamics of different dimen-sionalities,their inherent stability and toxicity issues,and how reaching similar performance to 3D in lower dimensionalities and their large-scale deployment can be achieved.

关键词： optoclectronics solar cells perovskite photo-detectors metal halides dimensionality

Livedo Reticularis in a Patient with EBV Mononucleosis

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Case Reports in Clinical Medicine 2016年第2期5卷 33-36页

作者： Gorica Svalina sean Ochsenbein J. Kelly smith Department of Academic Affairs James H. Quillen College of Medicine East Tennessee State University Johnson City USA Department of Biomedical Sciences James H. Quillen College of Medicine East Tennessee State University Johnson City USA

A 23-year-old woman with serologically confirmed EBV mononucleosis presented with fever, exudative pharyngitis, periorbital and lid edema, cervical lymphadenopathy, and splenomegaly. Two weeks after the onset of symptoms she developed a generalized symmetrical reticular eruption of unbroken hexagons characteristic of livedo reticularis that resolved over several weeks as her condition improved. To our knowledge, this is the first reported case of livedo reticularis to occur in a patient with EBV mononucleosis.

关键词： Infectious Mononucleosis EBV Livedo Reticularis Reticulate Eruption

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哈利·波特全揭密

疯狂英语（初中天地） 2007年第7期 11-12页

作者： sean smith 许婉燕

"波特"系列电影的明星,17岁的丹尼尔·拉德克利夫去年参演了曾获托尼奖的舞台剧《恋马狂》,在他的粉丝当中引起了一些争议。这个角色是一个有恋马情节的问题少年,要求拉德克利夫在一幕中全裸演出。他(当时)为什么会踏出这么不寻常的一... 详细信息

"波特"系列电影的明星,17岁的丹尼尔·拉德克利夫去年参演了曾获托尼奖的舞台剧《恋马狂》,在他的粉丝当中引起了一些争议。这个角色是一个有恋马情节的问题少年,要求拉德克利夫在一幕中全裸演出。他(当时)为什么会踏出这么不寻常的一步?"我内心的一部分希望摆脱人们对我的固有印象。"拉德克利夫在系列电影的第五部——《哈利·

关键词：哈利·波特

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系统安全工艺

作者： (美)sean smith (美)John Marchesini

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《哈利·波特》:终结大作席卷银幕

疯狂英语（初中天地） 2010年第11期 8-12页

作者： sean smith 小狐

不管是不是《哈利·波特》的粉丝，你一定看过一两部《哈利·波特》的小说或电影吧。在这十多年里，《哈利·波特》陪伴着很多人成长。随着小说结局尘埃落定，一部巨著划上了句号，三位主角也从懵懂少年长成风华正茂的年轻人。

关键词：波特银幕尘埃落定年轻人小说

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加密资产如何进行会计处理

新理财（公司理财） 2020年第2期 96-98页

作者： sean Stein smith John"Jack"Castonguay 不详

这种新形式的资产给企业内部控制和财务报告带来了一些独特的、不同寻常的挑战。自从比特币和其他加密资产在金融界大热之后,区块链一直是会计与财务领域讨论和分析最多的技术创新之一。与许多前沿的、可能带来变革的技术一样,在如何最... 详细信息

这种新形式的资产给企业内部控制和财务报告带来了一些独特的、不同寻常的挑战。自从比特币和其他加密资产在金融界大热之后,区块链一直是会计与财务领域讨论和分析最多的技术创新之一。与许多前沿的、可能带来变革的技术一样,在如何最好地管理加密资产以及如何应对潜在的监管和法律要求方面,企业的理解是相对滞后的。

关键词：会计处理财务报告企业内部控制区块链会计与财务技术创新比特币资产

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J.K.罗琳传哈利·波特背后的天才

Procedural simulation:medical student preference and value of three task trainers for ultrasound guided regional anesthesia

2002年

作者：（英）西恩·史密斯（sean smith）宋润娟等译

本书以“打开密室”、“叛逆女孩”、“自由女人”、“出版前后”、“柳暗花明”、“搬家”、“公众焦点”、“甜蜜爱心”等篇章记述了罗琳的一生。

ISBN: (纸本)7538716289

关键词：罗琳传记

来源：汇雅图书（南通市图书馆... 评论

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World Journal of Emergency Medicine 2017年第4期8卷 287-291页

作者： Shadi Lahham Taylaur smith Jessa Baker Amanda Purdy Erica Frumin Bret Winners sean P.Wilson Abdulatif Gari John C.Fox Department of Emergency Medicine University of CaliforniaIrvineOrangeCalifornia 92868USA UC Irvine School of Medicine IrvineCaliforniaUSA

BACKGROUND: Ultrasound guided regional anesthesia is widely taught using task trainer models. Commercially available models are often used; however, they can be cost prohibitive. Therefore, alternative "homemade" models with similar fidelity are often used. We hypothesize that professional task trainers will be preferred over homemade models. The purpose of this study is to determine realism, durability and cleanliness of three different task trainers for ultrasound guided nerve ***: This was a prospective observational study using a convenience sample of medical student participants in an ultrasound guided nerve block training session on January 24 th, 2015. Participants were asked to perform simulated nerve blocks on three different task trainers including, 1 commercial and 2 homemade. A questionnaire was then given to all participants to rate their experiences both with and without the knowledge on the cost of the simulator ***: Data was collected from 25 participants. The Blue Phantom model was found to have the highest fidelity. Initially, 10(40%) of the participants preferred the Blue Phantom model, while 10(40%) preferred the homemade gelatin model and 5(20%) preferred the homemade tofu model. After cost awareness, the majority, 18(72%) preferred the gelatin ***: The Blue Phantom model was thought to have the highest fidelity, but after cost consideration the homemade gelatin model was preferred.

关键词： Ultrasound guided nerve block Task trainer Regional anesthesia