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Promotion effects of alkali metals on iron molybdate catalysts for CO_(2)catalytic hydrogenation

Journal of Energy Chemistry 2023年第10期85卷 291-300,I0009页

作者： Yong Zhou Aliou Sadia Traore deizi v.peron Alan J.Barrios Sergei A.Chernyak Massimo Corda Olga v.Safonova Achim Iulian Dugulan Ovidiu Ersen Mirella virginie vitaly v.Ordomsky Andrei Y.Khodakov University of Lille CNRSCentrale LilleUniversity of ArtoisUMR 8181-UCCS-Unitéde Catalyse et Chimie du SolideLille F-59000France IPCMS UMR 7504 CNRSUniversitéde Strasbourg23 rue du LoessBP 43Cedex 267034 StrasbourgFrance PSI CH-5232 VilligenSwitzerland Fundamental Aspects of Materials and Energy Group Delft University of TechnologyMekelweg 15Delft 2629 JBNetherlands

CO_(2)hydrogenation is an attractive way to store and utilize carbon dioxide generated by industrial processes,as well as to produce valuable chemicals from renewable and abundant *** catalysts are commonly used for the hydrogenation of carbon oxides to ***-molybdenum catalysts have found numerous applications in catalysis,but have been never evaluated in the CO_(2)*** this work,the structural properties of iron-molybdenum catalysts without and with a promoting alkali metal(Li,Na,K,Rb,or Cs)were characterized using X-ray diffraction,hydrogen temperatureprogrammed reduction,CO_(2)temperature-programmed desorption,in-situ^(57)Fe Mossbauer spectroscopy and operando X-ray adsorption *** catalytic performance was evaluated in the CO_(2)*** the reaction conditions,the catalysts undergo the formation of an iron(Ⅱ)molybdate structure,accompanied by a partial reduction of molybdenum and carbidization of *** rate of CO_(2)conversion and product selectivity strongly depend on the promoting alkali metals,and electronegativity was identified as an important factor affecting the catalytic *** CO_(2)conversion rates were observed with the promoters having higher electronegativity,while low electronegativity of alkali metals favors higher light olefin selectivity.

关键词： CO_(2)utilization Iron molybdate catalysts Promotion Alkali metals Light olefins In-situ characterization

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On Conditionally Positive Definite Dot Product Kernels

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Acta Mathematica Sinica,English Series 2008年第7期24卷 1127-1138页

作者： v.A.MENEGATTO C.P.OLIvEIRA Ana P.peron Departamento de Matemática ICMC-USP- Sāo CarlosCaixa Postal 66813560-970 Sāo Carlos SPBrasil Universidade Federal de Itajubá ICE-DMCCaixa Postal 5037500-903 ItajubáMGBrasil

Let m and n be fixed, positive integers and P a space composed of real polynomials in m variables. The authors study functions f ： R →R which map Gram matrices, based upon n points of R^m, into matrices, which are nonnegative definite with respect to P Among other things, the authors discuss continuity, differentiability, convexity, and convexity in the sense of Jensen, of such functions

关键词： conditionally positive definite kernels dot product kernels Gram matrices convexity convexity in the sense of Jensen

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Lessons from “real life experience” of rifaximin use in the management of recurrent hepatic encephalopathy

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World Journal of Hepatology 2020年第1期12卷 10-20页

作者： Fiona Chautant Maeva Guillaume Marie-Angèle Robic Jean-François Cadranel Jean-Marie peron Hortensia Lison Charlène Cool Christophe Bureau véronique Duhalde Service Pharmacie Centre Hospitalier Universitaire de ToulouseHôpital Paule de ViguierToulouse 31059France Department of Hepato-Gastroenterology University HospitalToulouse 31059France Department of Hepato-Gastroenterology Laennec HospitalCreil 60109France Department of Pharmacy and UMR INSERM 1027 University HospitalToulouse 31059France Department of Pharmacy University Hospital ToulouseToulouse 31059France

BACKGROUND Hepatic encephalopathy(HE)is a major complication of cirrhosis with independent prognostic *** current management of HE is mainly based on *** has been shown to decrease the risk of HE recurrence in patients with episodic *** can also be ***,there is no drug support recommendation for rifaximin use in this *** To assess the effectiveness of rifaximin in the management of recurrent episodes of HE and recurrent acute exacerbations on persistent HE,in“real life conditions”.METHODS In this retrospective study,using a within-subjects design,we collected data of patients treated with rifaximin for HE in two liver diseases centers,during the six-month period before and during the six-month period after the initiation of *** primary effectiveness endpoint was the total number of HE events involving *** Rifaximin was introduced for prevention of recurrent HE episodes in 29 out of 62 patients with normal mental status between episodes and for prevention of recurrent acute exacerbations on persistent HE in 33 out of 62 *** the“prevention of recurrent HE episodes”group,fewer HE events(0.79 vs 1.78;P=0.013)were reported during the period of time when rifaximin was *** the“prevention of recurrent acute exacerbations on persistent HE”group,there was no significant difference in the number of HE-events(1.48 vs 1.77;P=0.582).CONCLUSION In this real-life experience,the effectiveness of rifaximin was confirmed in the prevention of HE episodes recurrence but was not proved in the prevention of acute exacerbations recurrence on persistent HE.

关键词： Rifaximin Hepatic encephalopathy Cirrhosis Liver disease Hospitalization

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丰中子核^(63,65,67)Mn的在束γ谱学研究

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原子核物理评论 2020年第3期37卷 548-553页

作者：卢洪洋刘小雨丁兵刘忠 P.Doornenbal A.Obertelli S.MLenzi P.M.Walker L.X.Chung B.D.Linh G.Authelet H.Baba D.Calvet F.Chateau A.Corsi A.Delbart J.M.Gheller A.Gillibert T.Isobe v.Lapoux M.Matsushita S.Momiyama T.Motobayashi M.Niikura F.Nowacki H.Otsu C.peron A.Peyaud E.C.Pollacco J.Y.Rousse H.Sakurai M.Sasano Y.Shiga S.Takeuchi R.Taniuchi T.Uesaka H.Wang K.Yoneda 中国科学院近代物理研究所兰州730000 中国科学院大学北京100049 RIKEN Nishina Center 2-1 HirosawaWakoSaitama 351-0198Japan IRFU CEAUniversitéParis-SaclayF-91191Gif-sur-YvetteFrance Institut für Kernphysik Technische Universität Darmstadt64289DarmstadtGermany Universitádi Padova and INFN Sezione di PadovaI-35131PadovaItaly Department of Physics University of SurreyGuildford GU27XHUnited Kingdom Institute for Nuclear Science&Technology VINATOM179Hoang Quoc VietCau GiayHanoiVietnam Center for Nuclear Study University of TokyoRIKEN campusWakoSaitama 351-0198Japan Department of Physics University of Tokyo7-3-1 HongoBunkyoTokyo 113-0033Japan IPHC CNRS/IN2P3Universitéde StrasbourgF-67037StrasbourgFrance Department of Physics Rikkyo University3-34-1 Nishi-IkebukuroToshimaTokyo 172-8501Japan

利用放射性束68Fe轰击液氢靶引起的敲出反应,研究了极端丰中子核^(63,65,67)Mn的激发态,指认了它们的自旋宇称,建立了这三个原子核的能级纲图。纲图包含11/2^(-)、9/2^(-)和7/2^(-)三个激发态以及5/2^(-)_(g.s.)基态,它们由三条ΔI=1的... 详细信息

利用放射性束68Fe轰击液氢靶引起的敲出反应,研究了极端丰中子核^(63,65,67)Mn的激发态,指认了它们的自旋宇称,建立了这三个原子核的能级纲图。纲图包含11/2^(-)、9/2^(-)和7/2^(-)三个激发态以及5/2^(-)_(g.s.)基态,它们由三条ΔI=1的γ跃迁连接。这种能级结构与K=5/2时强耦合转动带的特征一致。使用改进的LNPS有效相互作用(LNPSm)的大规模壳模型计算能很好地重现观测到的能级。计算表明,^(65,67)Mn的低位激发态都主要包含处于4p-4h的中子组态和1p-1h的质子组态。基于实验结果发现,在吸积中子星壳中,与质量数A=63相关的Urea中微子冷却效果比预期的要强很多,而A=65,67的冷却效果比预期的更弱。

关键词：在束γ谱学翻转岛丰中子核壳演化

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