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Dealloyed TiCuMn efficiently catalyze the NO reduction and Zn-NO batteries

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 51-59页

作者： Lang Zhang Tong Hou Weijia liu Yeyu Wu tianran Wei Junyang Ding Qian liu Jun Luo Xijun liu State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Education Department of Guangxi Zhuang Autonomous Region Key Laboratory of Applied Analytical ChemistryGuangxi Collaborative Innovation Center for Chemistry and Engineering of Forest ProductsGuangxi Key Laboratory of Chemistry and Engineering of Forest ProductsKey Laboratory of Chemistry and Engineering of Forest ProductsState Ethnic Affairs CommissionSchool of Chemistry and Chemical EngineeringGuangxi Minzu UniversityNanning 530006China Institute for New Energy Materials&Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Institute for Advanced Study Chengdu UniversityChengdu 610106China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China

Electrocatalytic NO reduction reaction offers a sustainable route to achieving environmental protection and NH3 production targets as *** this work,a class of dealloyed Ti_(60)Cu_(33)Mn_(7)ribbons with enough nanoparticles for the high-efficient NO reduction reaction to NH_(3)is fabricated,reaching an excellent Faradaic efficiency of 93.2%at–0.5 V vs reversible hydrogen electrode and a high NH3 synthesis rate of 717.4μmol·h^(-1)·mgcat.-1 at–0.6 V vs reversible hydrogen *** formed nanoparticles on the surface of the catalyst could facilitate the exposure of active sites and the transportation of various reactive ions and ***,the Mn content in the TiCuMn ribbons modulates the chemical and physical properties of its surface,such as modifying the electronic structure of the Cu species,optimizing the adsorption energy of N^(*)atoms,decreasing the strength of the NO adsorption,and eliminating the thermodynamic energy barrier,thus improving the NO reduction reaction catalytic ***,a Zn-NO battery was fabricated using the catalyst and Zn plates,generating an NH3 yield of 129.1µmol·h^(-1)·cm^(-2)while offering a peak power density of 1.45 mW·cm^(-2).

关键词： nitric oxide reduction NH3 electrosynthesis TiCuMn alloy Mn modulation Zn-NO battery

Au nanoclusters anchored on TiO_(2) nanosheets for high-efficiency electroreduction of nitrate to ammonia

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Nano Research 2024年第3期17卷 1209-1216页

作者： Miaosen Yang tianran Wei Jia He Qian liu Ligang Feng Hongyi Li Jun Luo Xijun liu School of Chemical Engineering Northeast Electric Power UniversityJilin 132012China Nanchang Institute of Technology Nanchang 330044China State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Institute for New Energy Materials and Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Institute for Advanced Study Chengdu UniversityChengdu 610106China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Guangzhou Panyu Polytechnic Guangzhou 511483China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaLonghua DistrictShenzhen 518110China

Electrocatalytic nitrate reduction reaction(NO_(3)RR)offers a unique rationale for green NH_(3) synthesis,yet the lack of high-efficiency NO_(3)RR catalysts remains a great *** this work,we show that Au nanoclusters anchored on TiO_(2) nanosheets can efficiently catalyze the conversion of NO_(3)RR-to-NH_(3) under ambient conditions,achieving a maximal Faradic efficiency of 91%,a peak yield rate of 1923μg·h^(-1)·mgcat.-1,and high durability over 10 consecutive cycles,all of which are comparable to the recently reported metrics(including transition metal and noble metal-based catalysts)and exceed those of pristine TiO_(2).Moreover,a galvanic Zn-nitrate battery using the catalyst as the cathode was proposed,which shows a power density of 3.62 mW·cm^(-2) and a yield rate of 452μg·h^(-1)·mgcat.-*** simulations further indicate that the atomically dispersed Au clusters can promote the adsorption and activation of NO_(3)-species,and reduce the NO_(3)RR-to-NH_(3) barrier,thus leading to an accelerated cathodic *** work highlights the importance of metal clusters for the NH_(3) electrosynthesis and nitrate removal.

关键词： NH3 electrosynthesis Zn-nitrate battery Au nanoclusters nitrate reduction reaction(NRR) TiO_(2)nanosheets

Two methods for separating the magnetospheric solar wind charge exchange soft X-ray emission from the diffuse X-ray background

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Earth and Planetary Physics 2024年第1期8卷 119-132页

作者： YingJie Zhang tianran Sun JenniferACarter WenHao liu Steve Sembay ShuiNai Zhang Li Ji Chi Wang State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China College of Earth and Planetary Sciences The University of Chinese Academy of SciencesBeijing 100190China School of Physics and Astronomy The University of LeicesterLeicesterUK Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008China

Solar wind charge exchange(SWCX)is the process of solar wind high-valence ions exchanging charges with neutral components and generating soft ***,detecting the SWCX emission from the magnetosphere is proposed as a new technique to study the magnetosphere using panoramic soft X-ray *** better prepare for the data analysis of upcoming magnetospheric soft X-ray imaging missions,this paper compares the magnetospheric SWCX emission obtained by two methods in an XMM-Newton observation,during which the solar wind changed *** two methods differ in the data used to fit the diffuse X-ray background(DXB)parameters in spectral *** method adding data from the ROSAT All-Sky Survey(RASS)is called the RASS *** method using the quiet observation data is called the Quiet method,where quiet observations usually refer to observations made by the same satellite with the same target but under weaker solar wind *** show that the spectral compositions of magnetospheric SWCX emission obtained by the two methods are very similar,and the changes in intensity over time are highly consistent,although the intensity obtained by the RASS method is about 2.68±0.56 keV cm^(-2)s^(-1)sr^(-1)higher than that obtained by the Quiet *** the DXB intensity obtained by the RASS method is about 2.84±0.74 keV cm^(-2)s^(-1)sr^(-1)lower than that obtained by the Quiet method,and the linear correlation coefficient between the difference of SWCX and DXB obtained by the two methods in diffe rent energy band is close to-1,the diffe rences in magnetospheric SWCX can be fully attributed to the diffe rences in the fitted *** difference between the two methods is most significant when the energy is less than 0.7 keV,which is also the main energy band of SWCX *** addition,the difference between the two methods is not related to the SWCX intensity and,to some extent,to solar wind conditions,because SWCX intensity typically va ries with the

关键词： solar wind charge exchange(SWCX) ROSAT All-Sky Survey(RASS) soft X-ray X-ray imaging magnetosphere

Recent progress and perspective on electrocatalysis in neutral media:Mechanisms,materials,and advanced characterizations

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Interdisciplinary Materials 2024年第4期3卷 492-529页

作者： Fayuan Lai Haochuan Shang Yuchao Jiao Xinyi Chen tianran Zhang Xiangfeng liu College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijingChina

Electrocatalysis,which involves oxidation and reduction reactions with direct electron transfer,is essential for a variety of clean energy conversion ***,the vast majority of studies regarding electrocatalysis reactions focus on strong acidic or alkaline media because of the higher catalytic ***,some inherent drawbacks,including the corrosive environment,expensive proton exchange membranes,and side effects,are still hard to break through.A sustainably promising way to overcome these shortcomings is to deploy neutral/near-neutral electrolytes for electrocatalysis ***,insufficient research in this area due to the lack of attention to related issues has slowed down the development *** this review,we systematically review the catalytic reaction mechanisms,neutral electrolytes,electrocatalysts,and modification strategies carried out in neutral media on the three most common electrocatalytic reactions,that is,hydrogen evolution reaction,oxygen reduction reaction,and oxygen evolution ***,the advanced characterization tools for guiding catalyst synthesis and mechanistic studies are also ***,we propose some challenges and perspectives on electrocatalysis reactions in neutral media and hope it will attract more research interest and provide guidance in neutral electrocatalysis.

关键词： advanced characterizations electrocatalysis HER/ORR/OER mechanism studies neutral/near-neutral electrolyte

A New Offset Hatch Path Generation Algorithm for 3D Model Slicing in RP

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A New Offset Hatch Path Generation Algorithm for 3D Model Sl...

第五届全国表面工程学术会议

作者： Jiayi Zhang, Weijun liu, tianran Wang

＜正＞ Rapid Prototyping （RP） is a relatively novel technique to produce prototypes for industry in a shorter period of time. The filling method in our Directed Metal Deposition （DMD） rapid prototyping and manufacturing system directly influences the quality of prototypes. By investigating the geometric properties of domains in a slice, a new reconstruction algorithm of offset boundaries of the contours on STL solid data model slicing is introduced and a Limit for boundaries offsetting is put forth. By these new methods, we can fill regions by the offsetting lines of the boundaries. The performance of the proposed algorithm is discussed based on the connection angle along the path, continuous motion and the forces distributing. Based on the new algorithm, software is programmed in VC++. Its application is fast and efficient.

关键词： rapid prototyping slicing offset boundaries

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神经增强技术:伦理争议与政策规制

中国科技论坛 2018年第4期 165-173页

作者：张君刘天然北京理工大学人文与社会科学学院北京100081

近年来神经增强作为一种涌现技术,引起人们的广泛关注。论文主要研究神经增强技术引发的伦理和社会影响,并在此基础上讨论相应的政策监管问题。论文考察了目前神经增强技术的现状和趋势,阐述了这类技术在用途、功效、伦理以及风险等方... 详细信息

近年来神经增强作为一种涌现技术,引起人们的广泛关注。论文主要研究神经增强技术引发的伦理和社会影响,并在此基础上讨论相应的政策监管问题。论文考察了目前神经增强技术的现状和趋势,阐述了这类技术在用途、功效、伦理以及风险等方面的广泛分歧,并指出这类会聚技术对于公共政策的挑战以及监管规制的必要性。通过分析不同伦理依据和价值体系下技术规制政策的多样性,论文结论指出,当前规制的可能重点方向是,加大研究以获得充分经验证据,系统评估增强技术,制定政策涉入的具体类型,全程监管研究程序的规范性等。

关键词：神经增强政策规制伦理和价值敏感负责任创新

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金属材料表面残余应力超声测量方法

机械工程学报 2021年第12期57卷 118-125页

作者：刘海波刘天然李亚鹏王永青大连理工大学精密与特种加工教育部重点试验室

针对金属材料零件制造中的表面残余应力无损检测难题,提出一种平面应力状态超声测量方法。基于线弹性理论,引入晶粒取向表征因子,揭示晶粒取向对超声传播的影响机制。虑及材料力学性质(弹性常数、晶粒取向等)和应力状态对声速的共同影响... 详细信息

针对金属材料零件制造中的表面残余应力无损检测难题,提出一种平面应力状态超声测量方法。基于线弹性理论,引入晶粒取向表征因子,揭示晶粒取向对超声传播的影响机制。虑及材料力学性质(弹性常数、晶粒取向等)和应力状态对声速的共同影响,建立平面应力分量-声速解耦模型。基于临界折射纵波(LCR波)表面应力测量原理,分析温度与耦合状态对超声信号衰减、畸变以及声时的影响规律,并设计出一种一发双收直接耦合造波探头。以单向拉伸的变截面铝合金板和搅拌摩擦焊后的轧制铝合金板为典型对象,利用自主开发的超声应力测量系统进行表面应力测量试验,分别与有限元法和小孔法进行对比,应力测量结果具有良好的一致性,可为金属材料表面残余应力测量提供可行方案。

关键词：金属材料表面应力超声测量晶粒取向

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资源有偿使用制度浅析

泰山学院学报 2015年第5期37卷 123-128页

作者：刘天然青海民族大学法学院青海西宁810007

新《环保法》第五条在应对经济发展与环境保护二者矛盾方面,确立了"保护优先"的基本原则,从根本上改变和摈弃了"先污染后治理"的错误观念和做法,是我国环境保护战略的整体转变。而资源有偿使用制度的确立正是此理念在制度构建上的突出... 详细信息

新《环保法》第五条在应对经济发展与环境保护二者矛盾方面,确立了"保护优先"的基本原则,从根本上改变和摈弃了"先污染后治理"的错误观念和做法,是我国环境保护战略的整体转变。而资源有偿使用制度的确立正是此理念在制度构建上的突出体现。

关键词：环境保护资源有偿使用制度构建思路

上颌快速扩弓联合前方牵引对替牙期骨性Ⅲ类错牙合畸形的矫治疗效

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山东大学学报（医学版） 2024年第3期62卷 77-86页

作者：赵天然刘东旭山东大学齐鲁医学院口腔医学院·口腔医院正畸科山东省口腔组织再生重点实验室山东省口腔生物材料与组织再生工程实验室山东济南250012 中国人民解放军联勤保障部队第九六〇医院口腔科山东济南250031

目的通过锥形束断层扫描技术(cone beam computed tomography,CBCT)研究评价上颌快速扩弓联合前方牵引对替牙期骨性Ⅲ类错牙合横向不足的治疗效果。方法选择替牙期骨性Ⅲ类错牙合患儿19例,平均(8.47±0.70)岁。分别于上颌快速扩弓联合... 详细信息

目的通过锥形束断层扫描技术(cone beam computed tomography,CBCT)研究评价上颌快速扩弓联合前方牵引对替牙期骨性Ⅲ类错牙合横向不足的治疗效果。方法选择替牙期骨性Ⅲ类错牙合患儿19例,平均(8.47±0.70)岁。分别于上颌快速扩弓联合前方牵引治疗前(T_(1))及扩弓结束3个月后(T_(2))拍摄CBCT,测量上颌第一磨牙倾斜度、上颌前磨牙段及第一磨牙牙冠宽度、牙槽突宽度、上颌基骨宽度、牙槽嵴高度、第二前磨牙牙胚在牙槽骨中的位置等,比较治疗前后各测量项目的差异。结果从T_(1)到T_(2)阶段,上颌第一前磨牙牙冠宽度增加(2.37±3.47)mm(P=0.008),第二乳磨牙牙冠宽度增加量中位数为3.37 mm(P=0.009),第一磨牙牙冠宽度增加(2.60±2.53)mm(P<0.001),上颌第一前磨牙、第二乳磨牙、第一磨牙对应牙槽突宽度分别增加(1.63±2.45)mm(P=0.010)、(2.12±2.59)mm(P=0.002)、(1.98±2.10)mm(P<0.001),第一磨牙腭根根尖宽度、第一磨牙阻抗中心宽度分别增加(2.00±2.40)mm(P=0.002)、(2.00±2.07)mm(P<0.001),差异具有统计学意义;上颌第一磨牙倾斜度(P_(左)=0.196、P_(右)=0.251)、上颌基骨宽度(P=0.192)、下颌基骨宽度(P=0.266)及第一磨牙根分叉宽度(P=0.678)、上颌第一前磨牙牙槽骨高度(P=0.136)、第二乳磨牙牙槽骨高度(P=0.638)、第一磨牙牙槽骨高度(P=0.274)、第二前磨牙牙胚在牙槽骨中的相对位置(P=0.058)治疗前后差异均无统计学意义。结论上颌快速扩弓联合前方牵引可明显改善替牙期骨性Ⅲ类错牙合患儿中后段牙弓及颌骨横向不调,治疗对前磨牙牙胚在牙槽骨中的相对位置无影响。

关键词：替牙期骨性Ⅲ类错牙合上颌扩弓基骨宽度锥形束计算机断层扫描