检索结果-南通市图书馆

Water gas shift activity of Co-Mo/MgO-Al_2._3 catalysts presulfided with ammonium sulfide

Journal of Natural Gas Chemistry 2010年第1期19卷 61-66页

作者： Yixin Lian, Huifang Wang, Weiping Fang, Yiquan Yang Department of Chemistry, College of Chemistry and Chemical engineering, national engineering laboratory for green Chemical productions of alcohols, ethers and esters, Xiamen University, Xiamen 361005, Fujian, China Department of Chemistry College of Chemistry and Chemical Engineering National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters Xiamen University Xiamen 361005 Fujian China

Co-Mo/MgO-Al2.3 catalyst was presulfided with ammonium sulfide in aqueous solution and activated with synthesis gas for water gas shift reaction. The assay results indicate that the presulfided Co-Mo/MgO-Al2.3 catalyst exhibits an excellent catalytic activity and stability. XRD and EPR characterization results show that the O-S exchange might occur during the impregnation, leading to the formation of （NH4）2.oS4 （or （NH4）zMoxSy） precursor, which was then thermally decomposed and reduced to MoS2. The higher catalytic performance is attributed to an optimization formation of active Co-Mo sulfides, consisting of well dispersed MoS2.and Co-Mo-S phase due to the redispersion of Co sulfide particles over the edges of newly formed MoS2.crystallites.

关键词： Co-Mo-based catalyst ammonium sulfide presulfidation water-gas shift

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Size and support effects for CO oxidation on supported Pd catalysts

引用

Science China Chemistry 2010年第9期53卷 2047-2056页

作者： WANG ZhaoWen,LI Bin,CHEN MingShu,WENG WeiZheng & WAN HuiLin State Key laboratory of Physical Chemistry of Solid Surfaces national {2. laboratory for green Chemical productions of alcohols-ethers-esters Department of Chemistry,College of Chemistry and Chemical {2.,Xiamen University,Xiamen 361005,China State Key laboratory of Physical Chemistry of Solid Surfaces Xiamen University Xiamen China national engineering {2. for green Chemical productions of alcohols-ethers-esters Xiamen University Xiamen China Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen China

Supporting Pd catalysts characterized significant different size distribution were obtained using PdCl2.[Pd(NH3)4](NO3)2.and Pd(acac)2.as ***-resolution transmission electron microscopy(TEM),X-ray diffraction(XRD),in-situ Fourier transform infrared spectroscopy(FTIR) and Raman spectroscopy were used to examine the dispersion of *** performance measurements show that the activities for CO oxidation increase as the Pd particle size decreases and the O2.CO ratio *** activities under oxygen rich conditions are significantly higher than those at near the stoichiometric *** on TiO2.prepared by the Pd(acac)2.precursor is highly dispersed,leading to a considerable activity for CO oxidation at near room *** oxidation on the 1 wt% Pd/TiO2.and under an O2.CO ratio of 1 characterized an apparent activation energy of 36.7 kJ/mol,which is closed to those reported for CO oxidation on the supported Au *** present work demonstrates a high catalytic activity of highly dispersed noble metals,and suggests a promising approach of using noble metals as catalysts with exceeding high efficiency.

关键词： noble metals supported palladium CO oxidation size effect support effect

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hydroalumination of diazo and azido compounds:An Al-H addition to end-on nitrogen of substrates

引用

Science China Chemistry 2010年第9期53卷 1970-1977页

作者： CHU ChenHui1,YANG Ying1,2.& ZHU HongPing1 1State Key laboratory of Physical Chemistry of Solid Surfaces national {2. laboratory for green Chemical productions of alcohols-ethers-esters College of Chemistry and Chemical {2.,Xiamen University,Xiamen 361005,China 2.chool of Chemistry and Chemical {2.,Central South University,Changsha 410083,China State Key laboratory of Physical Chemistry of Solid Surfaces national engineering {2. for green Chemical productions of alcohols-ethers-esters College of Chemistry and Chemical engineering Xiamen University Xiamen China School of Chemistry and Chemical engineering Central South University Changsha China

This paper reports the reactions of a monomeric aluminum dihydride LAlH2.L = HC[C(Me)N(Ar)]2.Ar = 2.6-i-Pr2.6H3) with diazo,azido,and terminal alkyne *** reaction of LAlH2.with N2.H(SiMe3) and N3(1-Ad) occurred through an Al-H addition to end-on nitrogen to yield respective compounds LAl[N(H)N = CH(SiMe3)]2.1) and LAl[N(H)N=N(1-Ad)]2.2.,while the reaction of LAlH2.with PhC≡CH occurred through a stepwise deprotonation to yield LAlH(C≡CPh)(5) and LAl-(C≡CPh)2.6),respectively.2.further reacted by N2.release to yield LAl[NH(1-Ad)][N(H)N=N(1-Ad)](3) and LAl[NH-(1-Ad)]2.4) upon the increased temperature *** 1-6 have been fully characterized,revealing novel reactivity patterns of LAlH2.toward different substrates under the steric influence from the bulky L ligand at Al.

关键词： hydroalumination bulky aluminum hydride multiple-bond molecule Al–H addition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Size control of silver nanoparticles via continuous-flow biosynthesis process

Size control of silver nanoparticles via continuous-flow bio...

引用

颗粒学最新进展研讨会——暨第十届全国颗粒制备与处理研讨会

作者： Hongyu Liu~(a,b,c,d) Jiale Huang~(b,c,d) Qingbia Li~(a,b,c,d) Lijing Wu~(b,c,d) a(Environmental Science Research Center,College of Oceanography and Environmental Science,Xiamen University,Xiamen 361005,PR China) b(Department of Chemical and Biochemical engineering,College of Chemistry and Chemical engineering,Xiamen University,Xiamen 361005,PR China) c({2. engineering laboratory for green Chemical productions of alcohols,ethers and esters,Xiamen University,Xiamen 361005,PR China) d(Key Lab for Chemical Biology of Fujian Province,Xiamen University,Xiamen 361005,PR China)

Size control biosynthesis of silver nanoparticles(AgNPs) by continuous-flow process in microreactors with different types was demonstrated in this *** Platycladi(***) extract is served as both reducing and capping *** effect of volumetric flow rate,concentration of *** extract,interface of different materials and different diameter of *** the completion of nucleation and the particle growth dynamics(size) were *** of AgNPs were examined by UV-Visible Spectroscopy,transmission electron microscopy(TEM),X-ray diffraction(XRD),and energy dispersive X-ray(EDX) *** was found that two distinguished particle size distribution are formation(several nm and dozens of nm) in the process of continuous flow synthesis when the biomass was abundant.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：