检索结果-南通市图书馆

Science China Chemistry 2010年第9期53卷 1870-1879页

作者： DEMIRCI Umit B AKDIM Ouardia HANNAUER Julien CHAMOUN Rita MIELE Philippe Université Lyon 1 CNRSUMR 5615Laboratoire des Multimatériaux et Interfaces

Cobalt is commonly admitted as being a promising catalyst in accelerating NaBH4 hydrolysis,being as reactive as noble metals and much more cost-effective.This is the topic of the present paper.Herein,we survey(i) the NaBH4-devoted literature while especially focusing on the Co catalysts and(ii) our work on the same topic.Finally,we report(iii) reactivity results of newly developed Co-based catalysts.From both surveys,it mainly stands out that Co has been investigated as catalysts in various forms:namely,as chlorides,reduced nanoparticles(metal Co,Co boride,Co-B alloy),supported over supports and shaped.In doing so the reactivity can be easily varied achieving H2 generation rates from few to >1000 L(H2)/min·g(metal).Nevertheless,our work can be distinguished from the NaBH4 literature.Indeed,we are working on strategies that focus on making alternative Co-based catalysts.One of these strategies is illustrated here as we report new reactivity data of Co-based Bimetallic supported catalysts.For example,we show that 20 wt% Co90Y10/γAl2O3-20 wt% Co95Hf5/γAl2O3 > 20 wt% Co99Zr1/γAl2O3 > 20 wt% Co/γAl2O3,the best catalysts showing HGRs of about 245 mL(H2)/min or 123 L(H2) /min·g(metals).

关键词： Bimetallic catalyst cobalt heterogeneous catalysis hydrogen hydrolysis sodium borohydride sodium tetrahydroborate

Binuclear Lanthanide Complexes Containing SodiumSyntheses and Crystal Structure of (C_5Me_5)_2Nd(μ-Cl)_2Na(DME)_2 and (C_5Me_5)_2Nd(μ-OCH_3)_2Na(DME)_2

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 1992年第3期10卷 170-174页

作者：林永华曾东水沈琪 Changchun Institute of Applied Chemistry Academia SinicaChangchun 130022China

The reaction of NdCl_3 with NaC_5Me_5 generates a novel complex (C_5Me_5)_2Nd(μ-Cl)_2Na(DME)_2 (1). Then (1) reacts with 1 mol ratio Na and a little methyl-naphthalene generating another novel complex (C_5Me_5)_2Nd(μ-OCH_3)_2Na(DME)_2 (2).Complex (1) belongs to orthorhombic crystal system,space group Pbn2_1 with a=1.2635(3) nm,b=1.6127(5) nm,c=1.6543(4J nm,V=3.371(2) nm^3,D_c=1.36 gcm^(-3) and Z=4.The central metal Nd is coordinated by two C_5Me5 ring centroids and two μ-chlorine atoms forming a distorted tetrahedron.The crystal of complex (2) is monoclinic,space group C2/n with a=1.7482(5) nm, b=1.3260(4) nm,c=1.6406(7) nm,β=109.39(3)°,V=3.5874(1) nm^3,D_c=1.26 gcm^(-3) and Z=4,Two five-membered ring centroids and two p-oxygens of OCH_3 form a distorted tetrahedron around the central neodymium ion.

关键词： Crystal structure Bimetallic Binuclear ianthanide complex

Polynuclear Lanthanoid Complexes Containing Aluminium—The Structure of[HoAl(CF_3COO)_2(CF_3CHOO)(C_2H_5)_2(C_4H_8O)_2]_2 at 233K

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 1991年第3期9卷 165-168页

作者：林永华金松春金鹰泰李振祥 Changchun Institute of Applied Chemistry Academia SinicaChangchun 130022China

[HoAl(CF_3COO)_2(CF_3CHOO)(C_2H_5)_2(C_4H_8O)_2]_2,Mr=1468.7,monoclinic,P 2_1/n,a=1.0084(4), b=1.8453(6),c=1.4501(6)nm,β=102.40(3)°,V=2.6355(1)nm^3,Z=2,D_c=1.81gcm^(-3),F(000)=1511, T=233K,Mo Kα radiation(λ=0.071069nm).R=0.052 for 6176 unique reflections[Ⅰ≥36(Ⅰ)].The structural units consist of dimeric molecules with the mixed ligand and central Bimetallic atoms,which are polynuclear lanthanoid complexes containing aluminium.Ho-Ho'distance is 0.3619(1)nm.The coordination polyhedron of Ho can be described in terms of a distored bicap-prism.

关键词： Crystal structure Bimetallic Mixed ligand Dimeric Polynuclear lanthanoid complex

Synthesis and Characterization of Sn-W Complexes and Crystal Structure of Ph₃SnW（CO）₃C₅H₄CH₃

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1997年第4期13卷 32-38页

作者： WANG Ji Tao ** , HE Hai Yang, XU Yu Ming, ZHANG Yun Wen and LIU Hong Zhou (Department of Chemistry, Nankai University, Tianjin, 300071)

ＳｙｎｔｈｅｓｉｓａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＳｎ┐ＷＣｏｍｐｌｅｘｅｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＰｈ３ＳｎＷ（ＣＯ）３Ｃ５Ｈ４ＣＨ３＊ＷＡＮＧＪｉ－Ｔａｏ＊＊，ＨＥＨａｉ－Ｙａｎｇ，Ｘ... 详细信息

ＳｙｎｔｈｅｓｉｓａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＳｎ┐ＷＣｏｍｐｌｅｘｅｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＰｈ３ＳｎＷ（ＣＯ）３Ｃ５Ｈ４ＣＨ３＊ＷＡＮＧＪｉ－Ｔａｏ＊＊，ＨＥＨａｉ－Ｙａｎｇ，ＸＵＹｕ－Ｍｉｎｇ，ＺＨＡＮＧＹｕｎ...

关键词： Bimetallic Trimetallic Metal metal bond

Synthesis, Crystal Structure and Thermal Behavior of a 3-D Barium(II)/Iron(III)-Oxalate Polymer

在线全文

学校读者我要写书评

暂无评论

Open Journal of Inorganic Chemistry 2014年第2期4卷 21-29页

作者： Noé Makon Ma Houga Brian S. Dolinar Justin Nenwa Gouet Bebga 2124 Chemistry Department University of Wisconsin-Madison Madison USA Department of Chemistry Higher Teacher Training College University of Yaounde 1 Yaounde Cameroon Department of Inorganic Chemistry University of Yaounde 1 Yaounde Cameroon

Reaction of Ba(NO3)2 with Fe(NO3)3·9H2O and H2C2O4·2H2O in aqueous medium readily affords, in high yield, the Bimetallic complex polymer of chemical composition {Ba6(H2O)17[Fe(C2O4)3]4}·7H2O (1), consistent with the expected ratio of 3BaII vs. 2FeIII. Compound 1 was fully characterized by elemental and thermal analyses, vibrational FTIR spectroscopy, and by single crystal X-ray structure determination. The bulk structure of 1 is a 3-D metal-organic framework held together by intermetallic linkages across oxalate and aqua oxygen bridgings. Thermal analyses of 1 show significant weight losses corresponding to water molecules (lattice and coordinated), followed by the decomposition of the network.

关键词： Tris(Oxalato)Ferrate(III) Anion Bimetallic Complex Polymer Crystal Structure Thermal Stability