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1890篇 您的检索式:作者名="Lacroix"
    题名 作者 年代 出处 被引量
1硫化态NiW/Al_2O_3催化剂加氢脱硫活性相的研究Ⅰ.XPS和HREM表征显示文摘采用孔饱和共浸法制备了一系列具有相同W含量和不同Ni含量的NiW/Al2 O3 催化剂 ,并对相应的硫化态催化剂进行了XPS和HREM表征 .结果表明 ,引入的助剂Ni优先修饰WS2 晶粒的边角位置 ,形成高活性的NiWS相 .催化剂中助剂Ni在噻吩加氢脱硫反应中的显著促进效应 (活性提高了约 30倍 )与形成的NiWS活性相数量有关 .同时 ,助剂Ni的引入使得催化剂表面WS2 晶粒的堆叠程度略有增加 ,晶片长度略有减小 ;而且引入助剂后WOx 相的硫化度提高了近 2 0 % .但相比之下 ,活性相织构的变化和硫化度的增大对催化脱硫活性的贡献较小 。左东华 聂红 Michel Vrinat 石亚华 Michel Lacroix 李大东 2004催化学报2004,25,4:33
2硫化态NiW/Al_2O_3催化剂加氢脱硫活性相的研究Ⅱ.程序升温还原表征显示文摘采用程序升温还原法对一系列具有相同W含量和不同Ni含量的硫化态NiW /Al2 O3 催化剂进行了表征 ,以考察催化剂中不同硫物种的数量及还原性能 .结果表明 ,含有助剂Ni的催化剂的TPR谱在 6 73~ 873K出现了一个还原峰 ,归属为催化剂的NiWS混合相被分解生成的硫化镍物种的还原 .随着助剂Ni含量的增加 ,与该还原峰相应的H2 S生成量增大 ,表明形成了更多的NiWS活性相 .另外 ,Ni/ (Ni+W )原子比为 0 4 1的催化剂样品的噻吩加氢脱硫活性随着还原温度的升高而急剧下降 ,证实了催化剂在还原过程中活性相被逐步分解 .左东华 聂红 Michel Vrinat 石亚华 Michel Lacroix 李大东 2004催化学报2004,25,5:7
3Synthesis of High Magnetic Moment CoFe Nanoparticles via Interfacial Diffusion in Core/Shell Structured Co/Fe Nanoparticles显示文摘We report the synthesis of high magnetic moment CoFe nanoparticles via the diffusion of Co and Fe in core/shell structured Co/Fe nanoparticles.In an organic solution,Co nanoparticles were coated with a layer of Fe to form a Co/Fe core/shell structure.Further raising the solution temperature led to inter-diffusion of Co and Fe and formation of CoFe alloy nanoparticles.These nanoparticles have high saturation magnetization of up to 192 emu/g CoFe and can be further stabilized by thermal annealing at 600℃.Chao Wang Sheng Peng Lise-Marie Lacroix Shouheng Sun 2009Nano Research2009,2,5:5
4Monitoring land degradation at national level using satellite Earth Observation time-series data to support SDG15-exploring the potential of data cube显示文摘Avoiding,reducing,and reversing land degradation and restoring degraded land is an urgent priority to protect the biodiversity and ecosystem services that are vital to life on Earth.To halt and reverse the current trends in land degradation,there is an immediate need to enhance national capacities to undertake quantitative assessments and mapping of their degraded lands,as required by the Sustainable Development Goals(SDGs),in particular,the SDG indicator 15.3.1(“proportion of land that is degraded over total land area”).Earth Observations(EO)can play an important role both for generating this indicator as well as complementing or enhancing national official data sources.Implementations like Trends.Earth to monitor land degradation in accordance with the SDG15.3.1 rely on default datasets of coarse spatial resolution provided by MODIS or AVHRR.Consequently,there is a need to develop methodologies to benefit from medium to high-resolution satellite EO data(e.g.Landsat or Sentinels).In response to this issue,this paper presents an initial overview of an innovative approach to monitor land degradation at the national scale in compliance with the SDG15.3.1 indicator using Landsat observations using a data cube but further work is required to improve the calculation of the three sub-indicators.Gregory Giuliani Bruno Chatenoux Antonio Benvenuti Pierre Lacroix Mattia Santoro Paolo Mazzetti 2020Big Earth Data2020,4,1:4
5硫化态NiW/Al_2O_3催化剂加氢脱硫活性相的研究Ⅲ.低温CO吸附-原位红外光谱表征显示文摘采用低温CO吸附 原位红外光谱法对硫化态和经过氢还原处理的W /Al2 O3 ,Ni/Al2 O3 以及不同Ni含量的NiW/Al2 O3催化剂进行了表征 .结果表明 ,在WS2 相上的两个CO特征吸收峰分别位于 2 117和 2 0 6 6cm-1处 ;硫化镍上吸附CO的特征峰位于 2 0 98cm-1处 ;NiW /Al2 O3 催化剂中引入的助剂Ni与WS2 相之间相互作用 ,并分别在 2 12 8,2 0 96和 2 0 78cm-1处出现三个新的谱峰 ,标志着NiWS活性相的形成 ,并且NiWS相的量随着助剂Ni含量的增加而增大 .在不同温度下对NiW/Al2 O3催化剂进行氢还原处理时发现 ,NiWS活性相在高温下逐步分解 ,并发生烧结 .以上结果有力地支持了前文中通过XPS ,HREM和TPR等方法所获得的有关催化剂活性相的形成及其还原分解过程的表征结果 .左东华 Francoise Mauge 聂红 Michel Vrinat 石亚华 Michel Lacroix 李大东 2004催化学报2004,25,5:4
6NiW/Al2O3加氢脱硫催化剂中助剂Ni的作用机理显示文摘对一系列具有相同W含量、不同Ni含量的NiW/Al2O3催化剂在噻吩和4,6-二甲基二苯并噻吩(4,6-DMDBT)加氢脱硫反应中的催化活性和选择性进行了测试,采用XPS、HREM、TPR和FTIR(CO)等手段对催化剂的表面活性物种和微观结构进行了表征.结果表明,催化剂中助剂Ni的显著助催化作用与其优先参与形成高活性NiWS相密切相关,而活性组分的分散度和硫化度的提高对其催化性能的影响相对较小.对硫化态催化剂的表征结果证实了助剂Ni参与形成NiWS活性相的过程.左东华 聂红 石亚华 李大东 Vrinat M Lacroix M 2004石油化工2004,33,z1:2
7Transport of particulate material and dissolved tracer in a highly permeable porous medium: comparison of the transfer parameters显示文摘Nicolas Massei Michel Lacroix Hua Qing Wang Jean-Paul Dupont 2002Journal of Contaminant Hydrology2002,,1:2
8Immobilized cell technologies for the dairy industry显示文摘CHAMPAGNE C P LACROIX C ISABELLE S G 1994Critical Reviews in Biotcchnology1994,,121:1
9Prevention of lipid radiolysis by natural antioxidants from rosemary and thyme 显示文摘Lacroix M Smoragiewicz W Nam K C 1997Food Research International1997,30,6:1
10Immobilized Cell Technologies for the Dairy Industry显示文摘Champagne C P Lacroix C Isabelle S G 1994Critical Reviews in Biotechnology1994,14,2:1
11Decisional Autonomy of Planetary Rovers 显示文摘INGRAND F LACROIX S LEMAI-CHENVIER S 2007Journal of Field Robotics2007,24,7:1
12Aniline electropolymerization on mild steel and zinc in a two-step process显示文摘LACROIX J C CAMALET J L AEIYACH S 2010Journal of Electroanalytiacl Chemistry2010,481,:1
13MedlinePlus : building and main- taining the National Library of Medicine' s consumer health Web service 显示文摘Miller N Lacroix EM Backus JE 2000Bulletin of the Medical Library Association2000,88,1:1
14Statistical analysis of multi-b factor diffusion weighted images can help distinguish between vasogenic and tumor: Infiltrated edema显示文摘Vandendries C Ducreux D Lacroix C 2013Journal of Magnetic Resonance Imaging2013,,:1
15Hypothermia therapy after traumatic brain injury in children显示文摘Hutchison JS Ward RE Lacroix J 2008N Engl J Med2008,358,23:1
16Effect of austenite stabilized via quenching and Partitioning on the strain hardening of martensitie steel 显示文摘Moore De Lacroix S Clark A J 2008Metallurgieal and Materials Transactions2008,9,:1
17Resonance in tunneling through magnetic valve tunnel junc-tions显示文摘VEDYAYEV A RYZHANOVA N LACROIX C 1997Europhysics Letters1997,39,2:1
18Frailty: emergence and consequences in women aged 65 and older in the Women's Health Initiative Observational Study 显示文摘Woods NF LaCroix AZ Gray SL 2005Am Geriatr Soe2005,53,8:1
19Lower Adiponectin levels at first trimester of pregnancy are associated with increased insulin resistance and higher risk of developing gestational diabetes mellitus显示文摘Lacroix M Battista MC Doyon M 2013Diabetes Care2013,,:1
20The choice of medical providers in rural Bénin: A comparison of discrete choice models显示文摘Denis Bolduc Guy Lacroix Christophe Muller 1996Journal of Health Economics1996,,4:1
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