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, surface area, and the mechanism of CO oxidation. The results show that, on XRD patterns, no evidence of CuO diffraction peaks is present until Cu loading is increased to 20%. The BET surface area... words:mesoporous CeO2; catalytic activity; CuO/CeO2; CO oxidation......
CeO2-Co3O4 Catalysts for CO Oxidation Li Jinjun1,Hao Zhengping1,Xu Xiuyan1 (1.Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China) Abstract:CeO2-Co3O4 catalysts for low-temperature CO oxidation were prepared by a co-precipitation method.In combination with the characterization methods of N2 adsorption/desorption, XRD, temperature-programmed......
Characterization and CO Catalytic Oxidation of CuO/Ce-Zr-La-O Catalyst 罗孟飞1,钟依均1,林瑞2 (1.Institute of Physical Chemistry, Zhejiang Normal niversity, Jinhua 321004,China;2.Institute of Physical... catalyst; CO oxidation activity; rare earths; [全文内容正在添加中] ......
酸盐浓度和pH下钴的电化学还原过程.结果表明:在组成为0.05 mol/L CoSO4·5H2O,0.20 mol/L Na2SO4和0~0.40 mol/L C6H5O7Na3·2H2O,pH为3~9的溶液中,二价钴以游离Co2+离子和[Co(C6H5O7)]配合物两种形态存在,并在电极表面被还原.溶液的pH对钴的电化学还原过程有显著的影响.当柠檬酸盐溶液的pH为3时,钴主要以游离Co2+离子的形态被还原；当溶液为弱酸性(pH=4~6)时,钴主要以[Co(C6H5O7)]-的形态被还原为Co0,还原过程分两步进行,中间产物在电极表面发生吸附；当柠檬酸盐水溶液的pH大于7时,形成的柠檬酸钴配合物主要是[Co(C6H5O7)]-和[Co(C6H4O7)]2-,这两种配合物非常稳定,其还原电位负于溶液的析氢电位,因此难以从该溶液中还原得到Co0. 关键词:二价钴离子；电化学还原过程；柠檬酸盐......
Trans. Nonferrous Met. Soc. China 28(2018) 2265-2273 Preparation and catalytic behavior of reduced graphene oxide supported cobalt oxide hybrid nanocatalysts for CO oxidation Yan WANG1,4, Ze-hua... catalysts possess high specific surface area and narrow pore size distribution. The catalytic properties of the as-prepared rGO-Co3O4 catalysts for CO oxidation were evaluated through a continuous......
胶-凝胶法分别制备未掺杂和钴掺杂TiO2溶胶,室温下将其分别与三乙胺反应制得氮掺杂和(Co, N)共掺杂的TiO2溶胶,然后通过浸渍-提拉法在钛片上成膜,经烧结获得掺杂光电极.采用XRD,SEM,XPS和紫外-可见光谱和光电流作用谱等对电极进行表征,并探讨其光电响应机理.结果表明:TiO2共掺杂后并未引起TiO2能带边缘位置发生明显改变,N主要以NOx形式掺杂；(Co, N)共掺杂TiO2薄膜电极...催化性能.已有报道显示钴[5]和氮元素[4, 10]的单掺杂具有较好的可见光催化活性.为进一步提高薄膜的可见光电响应性能,本文作者采用共掺杂的方法制备(Co, N)共掺杂TiO2电极,对其进行XRD,SEM,XPS等表征,对其光电性质进行较为系统的研究,探讨其光电响应提高的可能机理.迄今为止这种采用金属和非金属共同掺杂的方法来提高电极的可见光电响应的研究未见报道. 1 实验 1.1......
acid oxidation leaching with sulfuric acid, the leaching rate of Co is 96.35% when the nitric acid and sulfuric acid addition volume are 56 mL and 39 mL in 100 g cobalt ores, reaction time is 4 h...;Analysis results of Co phase in high-arsenic cobalt ores 图1 高砷钴矿的XRD谱 Fig.1 XRD pattern of high-arsenic cobalt ores 图2 高砷钴矿的SEM像 Fig.2 SEM image of high-arsenic cobalt......
Industry Press,2000. [11] 邵卫东, 严 彪, 毛彭龄. 新型钴基高温合金的组织结构与力学性能[J]. 上海有色金属, 2005, 26(4): 160-163. SHAO Wei-dong, YAN Biao, MAO Peng-ling. Structure and mechanical properties of newly developed Co-based... EDS analysis of GH5188 shows a decrease of Cr and Co content in the corrosion layer. Therefore, the mechanism of Co-based alloys is oxidation and dissolution of Cr, Fe and Co followed by volatilization......
Oxidation behavior of Ni(Co)CrAlYHf(Si) coatings on DS superalloy at 1 150 ℃ Huang Zhao-hui(黄朝晖), Tan Yong-ning(谭永宁), Zhao Xi-hong(赵希宏), LI Jian-ping (李建平), ZHANG Qiang(张 强) National... Ni(Co)CrAlY coatings were deposited by EB-PVD method on a DS superalloy of Ni-Al-Cr-Co-W-Mo-Ta-Hf system. SEM, XEDS and XRD were used to study the oxidation behavior of the coatings. The two coatings......
Trans. Nonferrous Met. Soc. China 28(2018) 469-486 Co evolutions for WC-Co with different Co contents during pretreatment and HFCVD diamond film growth processes Xin-chang WANG1, Cheng-chuan WANG1... and Technology, University of Ji’nan, Ji’nan 250022, China Received 22 July 2016; accepted 3 March 2017 Abstract: Systematical researches were accomplished on WC-Co with different Co contents (6%, 10......
