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N-doped graphene anchored ultrasmall Ir nanoparticles as bifunctional electrocatalyst for overall water splitting

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Green Energy & Environment 2022年第5期7卷 1111-1118页

作者： wenqing yao Xian Jiang Yulian Li Cuiting Zhao Linfei Ding Dongmei Sun Yawen Tang Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China Advanced Analysis&Testing Center Nanjing Forestry UniversityNanjing210037China

Seeking for extremely active and durable bifunctional electrocatalysts towards the overall water splitting possesses a strategic significance on the development of sustainable and clean energy for the replacement of fossil ***-based nanomaterials are deemed as one of the most highefficiency oxygen evolution reaction electrocatalysts while the hydrogen evolution reaction performance is *** this work,we report a one-pot hydrothermal synthesis of N-doped graphene anchored Ir nanoparticles(Ir/N-rGO) with ultrasmall particle size(~2.0 nm).Apart from the predictably superior OER performance,the resultant Ir/N-rGO also displays excellent hydrogen evolution reaction(HER) performance,requiring merely 76 and 260 mV overpotentials to achieve the current density of 10 mA cm^(-2) towards HER and OER,*** applied as the bifunctional electrodes for overall water splitting,Ir/N-rGO needs a lower overpotential(1.74 V) to achieve a current density of50 mA cm^(-2) in alkaline solution,exceeding that of Pt/C and RuO_(2) couple(1.85 V).Thus,the as-fabricated Ir/N-rGO has a commendable prospect in the practical application of alkaline water electrocatalysis.

关键词： splitting functional alkaline

Boosting tribo-catalytic conversion of H_(2)O and CO_(2)by Co_(3)O_(4)nanoparticles through metallic coatings in reactors

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Journal of Advanced Ceramics 2023年第10期12卷 1833-1843页

作者： Xuchao Jia Hongbo Wang Hua Lei Chenyue Mao Xiaodong Cui Yong Liu Yanmin Jia wenqing yao Wanping Chen School of Physics and Technology Wuhan UniversityWuhan 430072China School of Science Xi’an University of Posts and TelecommunicationsXi’an 710061China Department of Chemistry Tsinghua UniversityBeijing 100084China

In recent years,more and more metal oxides have been finding critical tribo-catalytic ***,we have explored the tribo-catalytic conversion of H_(2)O and CO_(2)using Co_(3)O_(4)nanoparticles and obtained some surprising *** an as-received 150 mL glass reactor enclosed with 10 mL of H_(2)O,0.10 g of Co_(3)O_(4)nanoparticles,1 atm of CO_(2),and a Teflon magnetic rotary disk,we observed the production of as much as 57.41μmol/L of H_(2),0.15μmol/L of CH_(4),and 0.21μmol/L of CO after 5 h of magnetic *** coatings of Cu,Ni,SUS316,Ti,Nb,Mo,and W were further introduced on reactor bottoms *** those coatings of Ni,SUS316,Ti,and Nb,the reduction of CO_(2)was dramatically enhanced,and C_(2+)products of C_(2)H_(6)and C_(2)H_(4)were *** for the Ti coating,the amounts of H_(2)and CH_(4)were increased by 2 and 26 times from those for the glass bottom,respectively,and the amounts of C_(2)H_(6)and C_(2)H_(4)were very *** Co_(3)O_(4)nanoparticles were proven chemically stable under magnetic stirring in water,and hydroxyl radicals and superoxide radicals have been detected for the Co_(3)O_(4)nanoparticles under magnetic stirring through fluorescence spectroscopy and electron paramagnetic resonance spectroscopy *** findings not only reveal outstanding capability of Co_(3)O_(4)to generate multicarbon products from H_(2)O and CO_(2)through tribo-catalysis but also highlight a promising potential of tribo-catalysis as a whole to harness mechanical energy for addressing energy shortages and environmental pollution.

关键词： tribo-catalysis water splitting CO_(2)reduction Co_(3)O_(4)

X射线光电子能谱(XPS)在催化产氢研究中的应用

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中国无机分析化学 2025年第1期15卷 1-20页

作者：文瑜琼曹亚鹏温翀祝天琪高星星王爱玲许家胜王舰姚文清大连大学环境与化学工程学院化学系大连116622 清华大学化学系北京100084

催化产氢技术因其高效、清洁的特性而备受关注,其中,催化材料性能的探索与优化是提升氢能产率的关键。X射线光电子能谱技术(XPS)作为一种表面分析技术,能够通过测量光电子的能量分布来解析样品表面的化学信息,包括元素的种类、含量、化... 详细信息

催化产氢技术因其高效、清洁的特性而备受关注,其中,催化材料性能的探索与优化是提升氢能产率的关键。X射线光电子能谱技术(XPS)作为一种表面分析技术,能够通过测量光电子的能量分布来解析样品表面的化学信息,包括元素的种类、含量、化学状态及电子结构,为催化产氢研究提供了不可或缺的工具。通过对XPS原理、催化产氢几种常见类型及原理、XPS在几种常见催化产氢材料体系的应用进行归纳,表明XPS不仅能够揭示材料表面活性位点的电子结构与化学环境,还能深入理解催化机理和反应路径,指导材料的理性设计。最后,对XPS技术未来在催化产氢领域的发展进行了展望,随着XPS与其他多种手段的结合,有助于推动催化产氢领域向更深层次的机理探索和高性能材料的开发,这一研究方向不仅促进了催化科学的发展,也为氢能经济的实现提供了强有力的支撑。

关键词：催化产氢 X射线光电子能谱技术(XPS) 催化材料表面分析催化机理材料设计

An Epidemic of Hepatitis A--Liaoning Province,2020

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China CDC weekly 2020年第30期2卷 570-574页

作者： Jing Sun Yuanqiu Li Xing Fang Yan Wang Yinan Han Yang Liu Jingyuan Cao Wenting Zhou Hui Zheng wenqing yao Liaoning Provincial Center for Disease Control and Prevention ShenyangLiaoningChina National Immunization Program Chinese Center for Disease Control and PreventionBeijingChina Institute of Preventive Medicine China Medical UniversityShenyangLiaoningChina Dalian City Center for Disease Control and Prevention DalianLiaoningChina Dandong City Center for Disease Control and Prevention DandongLiaoningChina National Institute for Viral Disease Control and Prevention Chinese Center for DiseaseControl and PreventionBeijingChina

What is already known about this topic?Hepatitis A(HA)is caused by acute hepatitis A virus(HAV)infection and was once very common in *** the 2008 introduction of the HA vaccine into the national Expanded Program on Immunization(EPI),the incidence of reported HA in China decreased ***,HA epidemics still occur in Liaoning Province every 3–5 years,although with far fewer cases than in the pre-HA-vaccination *** is added by this report?Between January 1,2020 and March 18,2020,the number of reported cases of HA in Dalian and Dandong cities of Liaoning Province increased significantly compared with the same period in previous *** cases were sporadic,and cases were seen in nearly every *** increase in HA occurred one month after local fresh seafood became available with most cases being among adults.A casecontrol study showed that consuming raw or undercooked seafood,clams,snapping shrimp,and oysters were significantly associated with the increase in *** are the implications for public health practices?Strengthening health education for residents to avoid consumption of raw seafood and encouraging HAV vaccination of adults aged 20 to 54 years are important to prevent periodic HAV endemic *** multisectoral cooperation must be emphasized on HA surveillance in areas with a high prevalence of HA.

关键词： consuming Liaoning vaccination

Two-step phase manipulation by tailoring chemical bonds results in high-performance GeSe thermoelectrics

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The Innovation 2023年第6期4卷 59-68页

作者： wenqing yao Yihua Zhang Tu Lyu Weibo Huang Nuoxian Huang Xiang Li Chaohua Zhang Fusheng Liu Matthias Wuttig Yuan Yu Min Hong Lipeng Hu College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060China Institute of Physics(A) RWTH Aachen UniversitySommerfeldstraBe 1452074 AachenGermany PGI 10(Green IT) Forschungszentrum Jjilich GmbH52428 JdlichGermany Center for Future Materials and School of Engineering University of Southem QueenslandSpringfield CentralQLD 4300Australia

In thermoelectrics,phase engineering serves a crucial function in deter-mining the power factor by affecting the band ***,for low-symmetry compounds,the mainstream one-step phase manipulation strategy,depending solely on the valley or orbital degeneracy,is inadequate to attain a high density-of-states effective mass and exceptional ***,we employ a distinctive two-step phase manipulation strategy through stepwise tailoring chemical bonds in ***,we amplify the valley degeneracy via CdTe alloying,which elevates the crystal symmetry from a covalently bonded orthorhombic to a metavalently bonded rhombohedral phase by significantly suppressing the Peierls ***,we incorporate Pb to trigger the convergence of multivalence bands and further enhance the density-of-states effective mass by moderately restraining the Peierls ***,the atypical metavalent bonding in rhombohedral GeSe enables a high Ge vacancy concentration and a small band effective mass,leading to increased carrier concentration and *** weak chemical bond along with strong lattice anharmonicity also reduces lattice thermal ***,this unique property ensemble contributes to an outstanding zT of 0.9 at 773 K for Geo.8oPbo.2oSe(CdTe)*** work underscores the pivotal role of the two-step phase manipulation by stepwise tailoring of chemical bonds in improving the thermoelectric performance of p-bonded chalcogenides.

关键词： alloying phase chemical

In Situ Analysis of Silicate Minerals by Auger Electron Spectroscopy

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In Situ Analysis of Silicate Minerals by Auger Electron Spec...

Electron migration behavior of Au/Cu multilayer films on Si substrate under UV radiation

中国真空学会2014学术年会

作者： Yanxue Wu wenqing yao Xiongyao Li Yang Li Kai Yan Department of Chemistry Tsinghua University Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

Auger electron spectroscopy(AES)is widely used in surface analysis of metal material andsemiconductor *** to charged effect of geological samples,the use of auger electron spectroscopy in geosciences has some *** recent years,however,AES is used for elemental characterization of sub-micrometer presolar grains[1].In this study,We have tried some methods of charge control and charge correction for the main extraterrestrial minerals,and obtained their chemical composition and some useful information about valence state by *** have selected mineral particles which sizes were less than 10μm for ultramicrotome slices adsorbed on the copper *** the minimum aperture,using 10keV electron beam would obtain the optimal spatial resolution and signal to noise *** these ways,the issues of charged effect of mineral samples have beenwell resolved(Fig 1),and since most of the electron beam passes through samples,the surface of some samples showed electron defect which could be compensated by software calibration.

关键词： Silicate Mineral Auger electron spectroscopy in situ valence state

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Electron migration behavior of Au/Cu multilayer films on Si ...

中国真空学会2014学术年会

作者： Kai Yan wenqing yao Jiangli Cao Yunshuang Li Yanxue Wu Department of Chemistry Tsinghua University Institute for Advanced Materials and Technology University of Science and Technology Beijing

Au/Cu system is widely used in the semiconductor industries and many other fields(includingmicro-electromechanical systems,MEMS).As an electronic component,it is applied in the spacecrafts and works in the low earth orbit(LEO)environment,so it is invariably influenced by UV *** energy of UV photoelectron is strong enough to destroy the chemical structure in multilayer films of *** now there are no reports about chemical structure analysis of surface and interface of multilayer metal films under UV radiation and scientific judgment for their failure *** it is of essential importanceto improve or develope the new multilayer thin films to establish a suitable estimation method to perform early diagnose of the changes on interface structure in electrode *** experimental results indicated that the electron migration induced by UV radiation in vacuum was the main reason resulting in the directed diffusion of Cu atoms to surface layer from the Au/Cu interface,the damage of the originally designed interface chemical structure and the final failure of the *** the same time,the thermal effect induced the morphology change of the films surface,that provided the passage for Cu atoms diffusion to surface layer through crystal boundary of Au *** the steady stage under UV radiation,the concentration gradients dCCu/dz of Cu atoms linear decreased with the treatment time t.

关键词： Interface width UV radiation Electro migration Work function Interface diffusion

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一起人间布鲁杆菌病爆发疫情的排除调查

中华地方病学杂志 2014年第1期33卷 84-86页

作者：孙广玖姚文清辽宁省疾病预防控制中心感染与传染性疾病控制所沈阳110005

目的调查并排除一起人间布鲁杆菌病爆发疫情。方法对在同一个集体单位、布鲁杆菌病（简称布病）最长潜伏期内发病的已构成布病诊断的3例新发布病病例与流感进行鉴别诊断，调查内容包括病例的流行病学接触史、临床症状体征及血常规检测... 详细信息

目的调查并排除一起人间布鲁杆菌病爆发疫情。方法对在同一个集体单位、布鲁杆菌病（简称布病）最长潜伏期内发病的已构成布病诊断的3例新发布病病例与流感进行鉴别诊断，调查内容包括病例的流行病学接触史、临床症状体征及血常规检测。血清试管凝集试验（SAT）检测病例及其接触的流产病牛布病抗体并进行布鲁杆菌分离；采集病例扁桃体、咽部分泌物，实时荧光定量PCR检测流感病毒RNA。结果3例病例都有与流产病牛或其污染环境接触的病史，均有发烧、乏力等症状；白细胞总数正常、淋巴细胞比例增高；SAT试验抗体滴度为1：200（＋＋＋），病原分离结果阴性；流产病牛的布病抗体检测结果阳性，抗体滴度为1：800（＋＋）；流感病毒BvRNA检测阳性。结论确诊3例患者为布病隐性感染偶合乙型流感，从而排除了一起人间布病爆发疫情。

关键词：布鲁杆菌病流感,人诊断

Reemergent Cases of COVID-19--Dalian City,Liaoning Province,China,July 22,2020

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China CDC weekly 2020年第34期2卷 658-660页

作者： Xiang Zhao Lingling Mao Jianqun Zhang Yong Zhang Yang Song Zhijian Bo Hong Wang Ji Wang Cao Chen Jinbo Xiao Tianjiao Ji Qian Yang Wenbo Xu Dayan Wang wenqing yao National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina Liaoning Province Center for Disease Control and Prevention ShenyangLiaoningChina Dalian Municipal Center for Disease Control and Prevention DalianLiaoningChina

From July 22-23,3 local COVID-19 cases were reported in Dalian City,Liaoning Province,*** 3 patients reported that they did not leave Dalian 14 days before the onset of disease and had no COVID-19 case contact history and no foreign personnel contact *** investigation,medical isolation,and nucleic acid detection was immediately carried out in Dalian,and 12 asymptomatic infections were detected in close contacts of Patient *** asymptomatic infections made up a large proportion of total infections,the outbreak was likely observed in the beginning stages.

关键词： Dalian likely Liaoning