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Sulfonated carbon dots modified IrO_(2)nanosheet as durable and high-efficient electrocatalyst for boosting acidic oxygen evolution reaction

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Nano research 2024年第9期17卷 8017-8024页

作者： Mengjie Ma Wenxiang Zhu Fan liao Kui Yin Hui Huang Kun Feng Dongdong Gao Jinxin Chen Zenan li Jun zhong Lai {3. Yang liu Mingwang Shao Zhenhui Kang institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Macao institute of Materials science and engineering(MIMSE) Macao University of Science and TechnologyTaipaMacao 999078China

Oxygen evolution reaction(OER)plays a crucial role in developing energy conversion and adjusting electronic structure of the electrocatalysts can effectively improve the catalytic activity and ***,it is a challenge to adjust the electronic structure on two-dimensional iridium dioxide nanosheets(IrO_(2)NS),which have the advantages of high atom ***,we regulate the surface properties of IrO_(2)NS through sulfonated carbon dots(SCDs)to promote the OER catalytic *** catalyst IrO_(2)NS/SCDs-2 exhibited excellent catalytic activity with a lower overpotential of 180 mV than IrO_(2)NS(23. mV)at the current density of 10 mA·cm^(-2)in a 0.5 M H_(2)SO_(4) *** after 160 h of stability testing,the overpotential of IrO_(2)NS/SCDs-2 only decreased by 4 ***,transient potential scanning test can visually demonstrate that the addition of SCDs improves the conductivity of the catalyst and increases the electron transfer rate.

关键词： sulfonated carbon dots oxygen evolution reaction electrocatalysis transient potential scanning

W, Mo, Co Co-diffusion on Steel with Different Carbon Content

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材料热处理学报 2004年第5B期25卷 688-691页

作者： zhangYan-mei lizhong-hou {3.Yan-ping xuzhong researchinstituteofsurface{3. TaiyuanUniversityofTechnologyTaiyuanChina

Tungsten, molybdenum and cobalt were co-diffused into the surface of ingot, 20 steel, 45 steel and T8 steel by a double glow plasma surface alloying technique. surface alloyed layers formed on ingot and 20 steel are composed of -Fe +(Fe,Co)7(W,Mo)6, which possess the same strong age-hardening abi{3.ty as the metallurgical age-hardened high speed steel, the maximum hardness can reach 1100 HV0.o25 after ageing treatment. surface alloyed layers formed on 45 steel and T8 steel are composed of M6C, hardness of which are over 1100-1400 HV0.o25- Alloyed layers formed on ingot and 20 steel possess good toughness. Alloyed layer of carbide type exhibits s{3.ghtly brittleness.

关键词：碳含量表面铸合碳钢硬度脆性钼钴共扩散

NEW DEVELOPMENT IN DOUBLE GLOW surface ALLOYING technology

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NEW DEVELOPMENT IN DOUBLE GLOW SURFACE ALLOYING TECHNOLOGY

700℃实炉验证试验平台过热试件热流密度测量及壁温分布研究

第一届国际机械工程学术会议

作者： xu zhong liu {3. li zhonghou(research institute of surface engineering taiyuan University of technology) Xie xishan {13. xu (University of science and technology beijing)

＜正＞ Several kinds of special alloys have been produced on the surfaces of iron andteels by use of Double Glow surface Alloying technology. surface Ni-Cr-Mo-Nb alloy, surface precipitation hardening high speed steel... 详细信息

关键词： Precipitation hardening Alloying Hardness Corrosion resistance

来源： cnki会议评论

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锅炉技术 2024年第3期55卷 1-9页

作者：钟犁肖平朱忠亮李小敏张兴豪刘卫国徐鸿华北电力大学能源动力与机械工程学院北京102209 北京华能长江环保科技研究院有限公司北京102209 中国华能集团清洁能源技术研究院有限公司北京102209 华能国际电力江苏能源开发有限公司南京电厂江苏南京210035

随着锅炉主蒸汽参数的提高,炉内受热面壁温的监测对于安全运行日益重要,并且有利于根据壁温分布进行选材,降低造价。南京电厂700℃验证试验平台炉内过热试件分布着12个牌号的材料,掌握锅炉管壁温分布及其随负荷变化的规律,是准确分析材... 详细信息

随着锅炉主蒸汽参数的提高,炉内受热面壁温的监测对于安全运行日益重要,并且有利于根据壁温分布进行选材,降低造价。南京电厂700℃验证试验平台炉内过热试件分布着12个牌号的材料,掌握锅炉管壁温分布及其随负荷变化的规律,是准确分析材料验证情况的基础。采用火焰强度热流计对炉内热流密度的空间分布进行实际测量,结合受热面进出口蒸汽参数的实际测量结果,对炉内壁温分布进行计算,结果表明:过热试件不同方向的热流密度在15~180kW/m^(2)范围内,并呈现明显的规律性,其中收到来自前方的热流密度最大、下方的热流密度其次,并且屏底热流密度最高、炉顶位置热流密度最低,屏底水平管平均热流密度约为垂直管的1.3.。根据热流密度空间分布测量结果计算的过热试件壁温沿着蒸汽流程方向快速增加,在屏底位置出现一个小的峰值,然后增速放缓、最后在靠近管屏出口处略有下降;而管壁和蒸汽温差呈现先增加后减少、并在屏底出现明显峰值的现象,最外侧管屏底最大温差达到约88℃,屏顶温差则降低到约25℃。锅炉负荷越高,热流密度越大,同时壁温沿程增长速率越高。炉内壁温测量元件与壁温计算结果的最大温度偏差小于2%,两者具有良好的一致性。根据壁温计算结果对过热试件进行选材,约有51.2%的锅炉管须采用镍基合金材料,相比全部采用镍基合金材料可大幅降低成本。

关键词： 700℃验证试验平台过热试件高温材料炉内壁温分布热流密度

NiFe-MOF和氮氧自由基协同增强甾醇电催化氧化

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物理化学学报 2024年第3期40卷 44-45页

作者：许银洁李随勤刘力豪贺佳辉李凯王梦欣赵舒影李纯张峥斌钟兴王建国浙江工业大学化工学院工业催化研究所绿色化学合成技术国家重点实验室杭州310032 浙江仙居君业药业有限公司研发部浙江台州317300

传统甾醇中间体氧化采用重金属铬作为氧化剂,存在毒性大和环境污染等问题。电催化氧化(ECO)以其高效、环保、可控的优点备受青睐,被认为是一种可替代传统工艺的方法。然而,目前ECO面临低电流密度和低时空产率的挑战。本研究采用一步溶... 详细信息

传统甾醇中间体氧化采用重金属铬作为氧化剂,存在毒性大和环境污染等问题。电催化氧化(ECO)以其高效、环保、可控的优点备受青睐,被认为是一种可替代传统工艺的方法。然而,目前ECO面临低电流密度和低时空产率的挑战。本研究采用一步溶剂热法在石墨毡上制备自支撑NiFe-MOF纳米片电催化剂,并耦合NiFe-MOF与氮氧自由基(4-乙酰氨-2,2,6,6-四甲基哌啶-1-氧)协同电催化策略以提高ECO性能。研究发现碱性电解液可重构NiFe-MOF催化剂,从而提高催化活性。此外,连续流动强化传质,成功实现以100 mA·cm^(-2)的大电流密度对19-羟基-4-雄甾烯-3.17-二酮(1a)的选择性电催化氧化,且选择性高达98%,时空产率可达15.88 kg·m^(-3.·h^(-1),是间歇电反应器的3.倍。寿命测试发现经10次循环反应后,NiFe-MOF/ACT协同体系对ECO仍具有较高的转化率。通过增大NiFe-MOF面积,将其组装至连续流动式电反应器并进行ECO恒电流电解,可达到12.99 kg·m^(-3.·h^(-1)的时空产率。该工作提出一种NiFe-MOF/ACT协同电催化氧化策略,为实现甾醇选择性氧化提供新的见解。

关键词：甾醇电催化氧化金属有机框架氮氧自由基协同作用

CEPC Technical Design Report

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Radiation Detection technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen xun Chen xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi ling-Yun Dai Xinchen Dai xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH University of science and technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing beijing Computational science research Center Beijing beijing Conveyi LTD Beijing beijing Glass research institute Co. LtdBeijing beijing institute of technology Beijing beijing Normal University Beijing Brown University ProvidenceRI Budker institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced science and technology Beijing China institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong Cockcroft institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint institute for Nuclear research(DLNP JINR) Dubna East China University Of science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 3. GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 3. MW per beam,it can achieve a luminosity of 5×10^(3.)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13.ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3.million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-203.s.

关键词： initiated exceeding precise

Microstructure and properties of ductile iron bars for plunger pump prepared by horizontal continuous casting process

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China Foundry 2019年第2期16卷 118-125页

作者： Chun-jie xu Zhen Zhao Yu Lei Yong-hui liu zhong-ming {3. Yan li Dan Shechtman School of Materials science and engineering Xi'an University of Technology Xi'an Shechtman Nobel Prize New Materials institute Shaanxi Huaan Continuous Casting Co. Ltd. Faculty of Materials science and engineering Technion-Israel Insititue of Technology

Ductile iron bars(DIBs) with a diameter of 145 mm, used for plunger pump production, were made by the horizontal continuous casting(HCC). The microstructure of the samples cut at three locations with different distances away from the surface(~20 mm from the surface, half of the radius and the center of the HCCDIBs)were investigated. The mechanical properties were measured by tensile and torsion tests. Results show that after the spheroidization of graphite, the iron matrix incorporates the nodules of Format I, Size 8 close to the surface, Format I, Size 7 at the half of the radius from the surface, and Format II, Size 6 in the centre of the bar,according to the ASTM A247 standard. The content of pearlite in the matrix changes from 55%(~20 mm from the surface) to 70%(half of the radius) and 80%(the center of the HCCDIBs). The strengths in tension are 552, 607 and 486 MPa with the elongations of 12.5%, 10.5% and 5.8% in samples cut at these three locations from the surface to the centre, respectively. The strength in torsion is equal to 558, 551 and 471 MPa at corresponding torsion angles of 418°, 3.4° and 144° respectively to the same distance from the bar surface. Fracture in tension is manifested via crack propagation through the interface between graphite nodules and matrix(Mode I), while in torsion the fracture is caused by the shear of graphite nodules(Mode II). It is shown that the transition between two fracture modes is also dependent on the size of graphite nodule. Typically, fracture Mode I was observed for nodules of smaller diameter(less than 22.7 μm) and fracture Mode II was seen for nodules of greater diameter(more than 24.8 μm).

关键词： horizontal continuous casting ductile iron bars plunger pump tension and torsion properties microstructure

High Energy Terahertz Parametric Oscillator Based on surface-Emitted Configuration

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Chinese Physics Letters 2013年第2期30卷 139-142页

作者： xu De-Gang zhang Hao JIANG Hao WANG Yu-Ye liu Chang-Ming YU Hong {3. zhong-Yang SHI Wei YAO Jian-Quan institute of Laser and Optoelectronics College of Precision Instrument and Optoelectronics EngineeringTianjin UniversityTianjin 300072 Key Laboratory of Optoelectronics Information science and technology(Ministry of Education) Tianjin UniversityTianjin 300072 North China University of Water Resources and Electric Power Zhenzhou 450011

We experimentally demonstrate a high power nanosecond pulsed terahertz(THz)-wave parametric oscillator(TPO)by using a wide pump beam.A surface emitted cavity configuration is employed to reduce the THz absorption in MgO:liNbO_(3. *** THz wave can be tuned from 1 THz to 3.THz.A maximum THz output energy of 43. nJ/pulse is achieved at 1.56 Hz using a 4.5-mm-diameter pump beam with a pulse energy of 226 mJ pump energy with the repetition of 10 Hz,corresponding to the energy conversion efficiency of 1.94×10^(-6).

关键词： pump Configuration repetition

Recent progress in perovskite solar cells:material science

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science China Chemistry 2023年第1期66卷 10-64页

作者： Jiang-Yang Shao Dongmei li Jiangjian Shi Chuang Ma Yousheng Wang Xiaomin liu Xianyuan Jiang Mengmeng Hao Luozheng zhang Chang liu Yiting Jiang Zhenhan Wang Yu-Wu zhong Shengzhong(Frank)liu Yaohua Mai Yongsheng liu Yixin Zhao Zhijun Ning lianzhou Wang Baomin xu Lei Meng Zuqiang Bian Ziyi Ge Xiaowei Zhan Jingbi You Yongfang li Qingbo Meng beijing National Laboratory for Molecular sciences CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Laboratory for Renewable Energy(CAS) Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Applied surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China institute of New Energy technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632China School of Environmental science and engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physical science and technology Shanghai Tech UniversityShanghai 201210China Australian institute for Bioengineering and Nano{3. and School of Chemical engineering The University of QueenslandSt LuciaBrisbaneQLD 4072Australia Department of Materials science and engineering Southern University of Science and TechnologyShenzhen 518055China Zhejiang Provincial engineering research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Polymer Chemistry and Physics of Ministry of Education School of Materials Science and EngineeringPeking UniversityBeijing 100871China Key Laboratory of Semiconductor Materials science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Chemical sciences University of Chinese Academy of SciencesBeijing 100049China Dalian National Laboratory for Clean Energy Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Key Laboratory of Funct

Perovskite solar cells represent a promising third-generation photovoltaic technology with low fabrication cost and high power conversion *** light of the rapid development of perovskite materials and devices,a systematic survey on the latest advancements covering a broad range of related work is urgently *** review summarizes the recent major advances in the research of perovskite solar cells from a material {3. *** discussed topics include the devices based on different type of perovskites(organic-inorganic hybrid,all-inorganic,and lead-free perovskite and perovskite quantum dots),the properties of perovskite defects,different type of charge transport materials(organic,polymeric,and inorganic hole transport materials and inorganic and organic electron transport materials),counter electrodes,and interfacial materials used to improve the efficiency and stability of *** discussions focus on the key progresses reported within the recent five ***,the major issues limiting the production of perovskite solar cells and the prospects for the future development of related materials are discussed.

关键词： perovskite solar cells power conversion efficiency perovskite materials hole transport materials electron transport materials counter electrode materials interfacial functional materials defects