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Correlation between impedance spectroscopy and bubble-induced mass transport in the electrochemical reduction of carbon dioxide

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Journal of Energy Chemistry 2022年第4期31卷 500-507页

作者： Stefania Lettieri Juqin Zeng M.Amin Farkhondehfal Umberto Savino Marco Fontana candido F.pirri Adriano Sacco Center for Sustainable Future Technologies@Polito Istituto Italiano di TecnologiaVia Livorno 6010144 TorinoItaly Department of Applied Science and Technology Politecnico di TorinoCorso Duca degli Abruzzi 2410129 TorinoItaly

In the electrochemical conversion of carbon dioxide, high currents need to be employed to obtain large production rates, thus implying that mass transport of reactants and products is of crucial *** aspect can be investigated by employing a model that depicts the local environment for the reduction reactions. Simultaneously, electrochemical impedance spectroscopy, despite being a versatile technique, has rarely been adopted for studying the mass transport features during the carbon dioxide(CO_(2))electroreduction. In this work, this aspect is deeply analyzed by correlating the results of impedance spectroscopy characterization with those obtained by a bubble-induced mass transport modeling under controlled diffusion conditions on a gold rotating disk electrode. The effects of potential and rotation rate on the local environment are also clarified. In particular, it has been found that CO_(2) depletion occurs at high kinetics when the rotation is absent, giving rise to an increment of the competing hydrogen evolution reaction. This feature reflects in an enlargement of the diffusion resistance, which overcomes the charge transport one.

关键词： Carbon dioxide conversion Impedance spectroscopy Mass transport Modeling Rotating disk electrode

Seasonal movement of the American horseshoe crab Limulus polyphemus in a semi-enclosed bay on Cape Cod,Massachusetts (USA) as determined by acoustic telemetry

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Current Zoology 2010年第5期56卷 575-586页

作者： Mary-Jane JAMES-pirri Graduate School of Oceanography University of Rhode Island

American horseshoe crabs Limulus polyphemus were tracked using acoustic telemetry and traditional tagging in asemi-enclosed bay on Cape Cod (Pleasant Bay),Massachusetts,USA,to determine seasonal movement ***-five activelyspawning females were fitted with transmitters in 2008 and 2009 and were tracked using acoustic telemetry from May 2008through July *** crabs with transmitters also had archive depth-temperature tags *** addition,over 2000spawning crabs (males and females) were tagged with US Fish and Wildlife (USFWS) button tags over the same ***-one percent of the crabs with transmitters were detected during this *** the spring,crabs were primarily located inthe northern section of the bay near spawning beaches,whereas in the fall crabs moved towards the deeper portions of the bay,and some may have overwintered in the *** was evidence that a majority (58%-71%) of the females with transmittersspawned in two sequential *** archive tag was recovered resulting in a year-long continuous record of depth and temperaturedata that,when integrated with telemetry data,indicated that the crab overwintered in the *** live recapture rate ofcrabs with USFWS button tags was 11%,with all re-sighted crabs except one observed inside Pleasant ***-three percentof recaptures were found within 2.5km of the tagging location,and 51% were observed at the same beach where they were *** study provides further evidence that horseshoe crabs in Pleasant Bay may be philopatric to this

关键词：马萨诸塞州遥测数据运动模式半封闭美国海湾季节鲎

黄光激光用Dy,Tb∶LuAG透明陶瓷的制备与性能研究

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发光学报 2022年第11期43卷 1733-1740页

作者：刘强武龙飞李晓英刘子玉陈鹏辉田丰谢腾飞 pirri Angela TOCI Guido 李江江苏大学材料科学与工程学院江苏镇江212013 中国科学院上海硅酸盐研究所透明光功能无机材料重点实验室上海201899 中国科学院大学材料与光电研究中心北京100049 Istituto di Fisica Applicata“N.Carrara” Consiglio Nazionale delle RicercheCNR-IFACVia Madonna del Piano 10C50019 Sesto Fiorentino(Fi)Italy Istituto Nazionale di Ottica Consiglio Nazionale delle RicercheCNR-INOVia Madonna del Piano 10C50019 Sesto Fiorentino(Fi)Italy

以NH_(4)HCO_(3)为沉淀剂,通过共沉淀法合成了分散性良好的Dy,Tb∶LuAG纳米粉体,并研究了前驱体的热分解行为、粉体的物相及显微形貌。在不添加任何烧结助剂的情况下,采用真空预烧结合热等静压烧结技术首次制备出高透明的Dy,Tb∶LuAG陶... 详细信息

以NH_(4)HCO_(3)为沉淀剂,通过共沉淀法合成了分散性良好的Dy,Tb∶LuAG纳米粉体,并研究了前驱体的热分解行为、粉体的物相及显微形貌。在不添加任何烧结助剂的情况下,采用真空预烧结合热等静压烧结技术首次制备出高透明的Dy,Tb∶LuAG陶瓷,并研究了预烧温度对陶瓷显微形貌及光学质量的影响。当预烧温度为1600℃时,退火后的Dy,Tb∶LuAG陶瓷(厚度为1.5 mm)在578 nm处的直线透过率达到83.6%,平均晶粒尺寸为0.9μm。此外,退火后的3%Dy,1%Tb∶LuAG透明陶瓷在447 nm的吸收截面积为1.3×10^(-21) cm^(2),半高宽为3.0 nm,与商用GaN蓝色激光二极管具有良好的匹配性。研究表明,Dy,Tb∶LuAG透明陶瓷在黄光激光领域具有潜在的应用价值。

关键词： Dy,Tb∶LuAG 透明陶瓷共沉淀法热等静压烧结

Fabrication,microstructures,and optical properties of Yb:Lu_(2)O_(3) laser ceramics from co-precipitated nano-powders

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Journal of Advanced Ceramics 2020年第6期9卷 674-682页

作者： Ziyu LIU Guido TOCI Angela pirri Barbara PATRIZI Yagang FENG Jiabei WEI Feng WU Zhaoxiang YANG Matteo VANNINI Jiang LI Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Istituto Nazionale di Ottica Consiglio Nazionale delle RicercheCNR-INOSesto Fiorentino(Fi)50019Italy Istituto di Fisica Applicata“N.Carrara” Consiglio Nazionale delle RicercheCNR-IFACSesto Fiorentino(Fi)50019Italy School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013China

The Yb:Lu_(2)O_(3)precursor made up of spherical particles was synthesized through the co-precipitation method in the water/ethanol *** 5 at% Yb:Lu_(2)O_(3)powder is in the cubic phase after calcination at 1100℃ for 4 *** powder also consists of spherical nanoparticles with the average particle and grain sizes of 96 and 49 nm,*** average grain size of the pre-sintered ceramic sample is 526 nm and that of the sample by hot isostatic pressing grows to 612 *** 1.0 mm-thick sample has an in-line transmittance of 81.6%(theoretical value of 82.2%)at 1100 *** largest absorption cross-section at 976 nm is 0.96×1^(0-20)cm^(2) with the emission cross-section at 1033 nm of 0.92×10^(-20)cm^(2) and the gain cross sections are calculated with the smallest population inversion parameter β of *** highest slope efficiency of 68.7% with the optical efficiency of 65.1% is obtained at 1033.3 nm in quasi-continuous wave(QCW)*** the case of continuous wave(CW)pumping,the highest slope efficiency is 61.0% with the optical efficiency of 54.1%.The obtained laser performance indicates that Yb:Lu_(2)O_(3)ceramics have excellent resistance to thermal load stresses,which shows great potential in high-power solid-state laser applications.

关键词： Yb:Lu_(2)O_(3)transparent ceramics co-precipitated nano-powder spectroscopic properties laser performance hot isostatic pressing

共沉淀纳米粉体制备Yb:CaF2激光陶瓷及其性能研究（英文）

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无机材料学报 2019年第12期34卷 1341-1348页

作者：韦家蓓 TOCI Guido pirri Angela PATRIZI Barbara 冯亚刚 VANNINI Matteo 李江中国科学院上海硅酸盐研究所透明光功能无机材料重点实验室上海200050 中国科学院大学材料科学与光电工程中心北京100049 意大利国家研究委员会国立光学研究所佛罗伦萨50019 意大利国家研究委员会“Carrara”应用物理研究所佛罗伦萨50019 意大利国家研究委员会国立光学研究所比萨56124

利用共沉淀法合成的粉体,通过真空烧结结合热压烧结后处理制备了掺镱的氟化钙透明陶瓷(Yb:CaF2)。在600℃预烧1 h,700℃热压烧结2 h制备的5at%Yb:CaF2透明陶瓷在1200 nm处的直线透射率达到92.0%。对陶瓷的显微结构、光谱特性和激光性能... 详细信息

利用共沉淀法合成的粉体,通过真空烧结结合热压烧结后处理制备了掺镱的氟化钙透明陶瓷(Yb:CaF2)。在600℃预烧1 h,700℃热压烧结2 h制备的5at%Yb:CaF2透明陶瓷在1200 nm处的直线透射率达到92.0%。对陶瓷的显微结构、光谱特性和激光性能进行了测试和讨论。研究结果表明,陶瓷样品的显微结构均匀,平均晶粒尺寸为360 nm。此外,计算得到Yb:CaF2陶瓷在977nm处的吸收截面和1030nm处的发射截面分别为0.39×10–20和0.26×10–20cm2。最后,对Yb:CaF2陶瓷激光性能进行了表征,得到最大输出功率为0.9 W,最大斜率效率为23.6%。

关键词： Yb:CaF2 共沉淀法两步烧结激光陶瓷光学性能

Ultraviolet mem-sensors： Flexible anisotropic composites featuring giant photocurrent enhancement

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Nano Research 2015年第6期8卷 1956-1963页

作者： A. Chiolerio I. Roppolo V. Cauda M. Crepaldi S. Bocchini K. Bejtka A. Verna G. F. pirri Center for Space Human Robotics Istitutoltaliano di Tecnologia Corso Trento 21 Torino 10129 Italy

由使用二个分开的部件，察觉到 mem 设备能被制作把一个变换器的敏感与非不稳定的存储器相结合。这里，我们讨论一个 mem 传感器怎么能与内建的察觉到的 andmemory 能力用单个材料被制作，基于在 photocurable 树脂嵌入并且从由垂直地... 详细信息

由使用二个分开的部件，察觉到 mem 设备能被制作把一个变换器的敏感与非不稳定的存储器相结合。这里，我们讨论一个 mem 传感器怎么能与内建的察觉到的 andmemory 能力用单个材料被制作，基于在 photocurable 树脂嵌入并且从由垂直地排列越过用 dielectrophoresis 的聚合矩阵的 MW 的液体处理了的 ZnO 微传线(MW ) 。这导致一紫外(紫外) 光电探测器，广泛地在象电信那样的领域里被使用，并且到目前为止实现了使用体积的一台设备，健康，和防卫无机的半导体。然而，无机的察觉者受不了很高的生产费用，易碎物，巨大的设备要求，和低 responsivity。这里，我们第一次建议 aneasy 可处理、可再现、便宜的混合紫外 mem 传感器。有排列 ZnO MW 的 Composites 与随机分布式的 MW 生产巨大的 photocurrentscompared 到一样的 composites。特别地，我们高效地利用光电流带当时，设备经验丰富的最后电子状态的记忆的 mem 反应在测试下面。而且，我们表明在 thedielectrophoresis 期间使用的不同波浪侧面的非等价：一个搏动的波浪能在轴和 MW 的取向导致顺序，而一个正弦波浪仅仅影响取向。

关键词：柔性复合材料传感器紫外线各向异性非易失性存储器无机半导体强光设备通信

固体激光用Nd:Lu_(2)O_(3)透明陶瓷的制备和光学性能研究

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无机材料学报 2021年第2期36卷 210-216页

作者：刘子玉 TOCI Guido pirri Angela PATRIZI Barbara 冯亚刚陈肖朴胡殿君田丰吴乐翔 VANNINI Matteo 李江中国科学院上海硅酸盐研究所透明光功能无机材料重点实验室上海201899 中国科学院大学材料与光电研究中心北京100049 意大利国家研究委员会国立光学研究所佛罗伦萨50019 意大利国家研究委员会“Carrara”应用物理研究所佛罗伦萨50019

Nd:Lu_(2)O_(3)材料由于具有高热导率、低声子能量和优异的光学特性而成为非常有前景的高功率固体激光器用的增益介质。但Lu_(2)O_(3)单晶的熔点超过2400℃,难以生长,而Lu_(2)O_(3)陶瓷既能在低温下制备,又具有与晶体相当的光学性质和... 详细信息

Nd:Lu_(2)O_(3)材料由于具有高热导率、低声子能量和优异的光学特性而成为非常有前景的高功率固体激光器用的增益介质。但Lu_(2)O_(3)单晶的熔点超过2400℃,难以生长,而Lu_(2)O_(3)陶瓷既能在低温下制备,又具有与晶体相当的光学性质和激光性能从而备受关注。本研究制备了高透明的Nd:Lu_(2)O_(3)陶瓷并对其光学性质和激光性能进行探究。以共沉淀法制备的纳米粉体为原料,采用真空烧结结合热等静压(HIP)两步烧结法制备了1.0at%Nd:Lu_(2)O_(3)透明陶瓷。对制备的粉体、素坯和陶瓷的微结构进行了表征:HIP后处理的陶瓷平均晶粒尺寸是724.2nm。厚度为1.0mm的1.0at%Nd:Lu_(2)O_(3)透明陶瓷在1100 nm处的直线透过率是82.4%,样品在806 nm处的吸收截面为1.50×10^(-20)cm^(2),而根据荧光光谱计算得到的发射截面为6.5×10^(–20)cm^(2)。分别在878.8和895.6 nm波长激发下,1.0at%Nd:Lu_(2)O_(3)透明陶瓷(4)^F3/2→(4)^I11/2跃迁的平均荧光寿命均为169ms。当输出耦合镜的透过率TOC=2.0%时,退火后的1.0at%Nd:Lu_(2)O_(3)透明陶瓷获得了最大输出功率为0.47 W的准连续(QCW)激光输出,斜率效率为8.7%。本研究成功制备了显微结构均匀、高透明度的1.0at%Nd:Lu_(2)O_(3)陶瓷,并展示了其在固体激光增益介质领域的广阔应用潜力。

关键词： Nd:Lu2O3透明陶瓷共沉淀法两步烧结光学性能激光性能

ADV36 adipogenic adenovirus in human liver disease

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World Journal of Gastroenterology 2014年第40期20卷 14706-14716页

作者： Francesca M Trovato Daniela Catalano Adriana Garozzo G Fabio Martines Clara pirri Guglielmo M Trovato Department of Medical anPediatric Sciences Internal Medicine University of Catania95100 Catania Italy Department of Biomedical Science University of Catania 95100 Catania Italy

obesity and liver steatosis are usually described as related *** is regarded as exclusive consequence of an imbalance between food intake and physical exercise,modulated by endocrine and genetic ***-alcoholic fatty liver disease(NAFLD),is a condition whose natural history is related to,but not completely explained by over-nutrition,obesity and insulin *** is evidence that environmental infections,and notably adipogenic adenoviruses(ADV)infections in humans,are associated not only with obesity,which is sufficiently established,but also with allied conditions,such as fatty *** order to elucidate the role,if any,of previous ADV36 infection in humans,we investigated association of ADV36-ADV37 seropositivity with obesity and fatty liver in ***,the possibility that lifestyle-nutritional intervention in patients with NAFLD and different ADV36 seropositive status,achieves different clinical outcomes on ultrasound bright liver imaging,insulin resistance and obesity was ***36 seropositive patientshave a more consistent decrease in insulin resistance,fatty liver severity and body weight in comparison with ADV36 seronegative patients,indicating a greater responsiveness to nutritional *** effects were not dependent on a greater pre-interventional body weight and older *** results imply that no obvious disadvantage-and,seemingly,that some benefit-is linked to ADV36 seropositivity,at least in ***36 previous infection can boost weight loss and recovery of insulin sensitivity under interventional treatment.

关键词： Non-alcoholic fatty liver disease Human adenovirus

Relationship of MTHFR gene polymorphisms with renal and cardiac disease

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World Journal of Nephrology 2015年第1期4卷 127-137页

作者： Francesca M Trovato Daniela Catalano Angela Ragusa G Fabio Martines Clara pirri Maria Antonietta Buccheri Concetta Di Nora Guglielmo M Trovato Department of Internal Medicine University of Catania95100 CataniaItaly AOU Prenatal Diagnosis and Medical Genetics University of Catania95100 CataniaItaly Internal and Emergency Medicine Department University of Catania95100 CataniaItaly

AIM: To investigate the effects of different methylenetetrahydrofolate reductase(MTHFR) 677C>T gene polymorphism and hyperhomocysteinemia for the development of renal failure and cardiovascular events, which are ***: We challenged the relationship, if any, of MTHFR 677C>T and MTHFR 1298A>C polymorphisms with renal and heart function. The present article is a reappraisal of these concepts, investigating within a larger population, and including a subgroup of dialysis patients, if the two most common MTHFR polymorphisms, C677 T and A1298 C, as homozygous, heterozygous or with a compound heterozygous state, show different association with chronic renal failure requiring hemodialysis. MTHFR polymorphism could be a favorable evolutionary factor, i.e., a protective factor for many ominous conditions, like cancer and renal failure. A similar finding was reported in fatty liver disease in which it is suggested that MTHFR polymorphisms could have maintained and maintain their persistence by an heterozygosis advantage mechanism. We studied a total of 630 Italian Caucasian subject aged 54.60 ± 16.35 years, addressing to the increased hazard of hemodialysis, if any, according to the studied MTHFR genetic polymorphisms. RESULTS: A favorable association with normal renal function of MTHFR polymorphisms, and notably of MTHFR C677 T is present independently of the negative effects of left ventricular hypertrophy, increased IntraRenal arterial Resistance and hyperparathyroidism. CONCLUSION: MTHFR gene polymorphisms could have a protective role on renal function as suggested by their lower frequency among our dialysis patients in end-stage renal failure; differently, the association with left ventricular hypertrophy and reduced left ventricular relaxation suggest some type of indirect, or concurrent mechanism.

关键词：还原酶肾衰竭治疗方法临床分析