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| 1 | 载体焙烧气氛对甲醇水蒸气重整制氢CuO/CeO_2催化剂的影响显示文摘采用沉淀法和浸渍法制备了具有氧空位的CeO_2纳米材料和甲醇水蒸气重整制氢CuO/CeO_2催化剂,探索不同焙烧气氛对CeO_2纳米材料结构、性质和甲醇水蒸气重整制氢性能的影响。采用SEM、XRD、BET、H2-TPR、N2O滴定和XPS等手段对催化剂进行了表征。结果表明,CuO/CeO_2催化剂的催化活性与催化剂的Cu比表面积大小、Cu-Ce的相互作用强弱、表面缺陷和表面氧空位的多少有关。其中,在氢气气氛下焙烧所得的CeO_2负载CuO后的CuO/CeO_2-H催化剂催化活性最佳。在反应温度为250℃,水醇物质的量比为1.2时,甲醇气体空速为800 h-1,甲醇转化率达到了100%,重整尾气中CO含量为0.87%。 | 刘玉娟 王东哲 张磊 王宏浩 陈琳 刘道胜 韩蛟 张财顺 | 2018 | 燃料化学学报2018,46,8: | 24 |
| 2 | 扩散控制合成Cu基催化剂及其Rochow反应性能研究(英文)显示文摘大多数材料的功能和性质取决于它们的结构,而扩散机制是调控材料生长和结构的一个主要动力学因素.本工作提出了一条系统且可行的策略即通过控制扩散系数来制备Cu_2O固体球和六面体,且这些Cu_2O产物可以分别通过水合肼溶液中氢原子扩散控制和空气中氧原子扩散控制,转变成相应的Cu中空球和六面体,以及CuO多孔球和六面体.此外,对转变过程的微观机制作了详尽的讨论;用固定床评价了这些材料在用来合成有机硅行业广泛使用的单体的Rochow反应中的催化性能.结果表明,相较于Cu中空球,Cu_2O固体球和CuO多孔球表现出了更高的二甲基二氯硅烷选择性和硅粉原料转化率,这主要归因于在形成CuxSi活性相的过程中,Cu_2O和CuO中的晶格氧去除以后形成的表面氧缺陷可以作为反应物CH_3Cl的吸附活性位.该工作不仅提出一种制备规整Cu_2O固体球和六面体的可行方法,而且揭示了Rochow反应合成单体二甲基二氯硅烷中Cu,Cu_2O和CuO各自的催化作用. | 刘合之 李晶 纪永军 张在磊 汪学广 钟子宜 苏发兵 | 2017 | Science China Materials2017,60,12: | 2 |
| 3 | 水热合成温度对CuO/CeO_(2)催化甲醇水蒸气重整制氢性能的影响显示文摘以Ce(NO_(3))_(3)·6H_(2)O为铈源,尿素为沉淀剂,采用水热法制备纳米CeO_(2)载体,并通过改变水热合成温度来控制CeO_(2)载体的微观结构,再通过等体积浸渍法制得CuO/CeO_(2)催化材料,并将其应用在甲醇水蒸气重整制氢反应(MSR)中进行性能评价。通过低温N2吸附-脱附、XRD、H_(2)-TPR、XPS等表征,探究了不同水热合成温度对纳米CeO_(2)载体的微观结构、CuO/CeO_(2)催化材料结构和甲醇水蒸气重整制氢反应性能的影响。结果表明,在水热合成温度为180℃条件下制备的纳米CeO_(2)载体具有立方萤石结构,且负载CuO后制备的CuO/CeO_(2)催化材料中表相CuO的还原温度较低、Cu-Ce间的相互作用较强、催化材料表面氧空穴较多,因此,表现出较好的催化活性。当反应温度为280℃,水醇物质的量比(W/M)为1.2,甲醇水蒸气气体空速(GHSV)为800 h^(−1)时,甲醇转化率可达到91.0%,重整气中CO摩尔分数为1.29%。 | 冯旭 林宇 张财顺 韩蛟 庆绍军 张磊 高志贤 官国清 | 2022 | 燃料化学学报2022,50,7: | 1 |
| 4 | A general bottom-up synthesis of CuO-based trimetallic oxide mesocrystal superstructures for efficient catalytic production of trichlorosilane显示文摘Mesocrystals, the non-classical crystals with highly ordered nanoparticle superstructures, have shown great potential in many applications because of their newly collective properties. However, there is still a lack of a facile and general synthesis strategy to organize and integrate distinct components into complex mesocrystals, and of reported application for them in industrial catalytic reactions. Herein we report a general bottom-up synthesis of CuO-based trimetallic oxide mesocrystals (denoted as CuO-M1Ox-M2Oy, where M1 and M2 = Zn, In, Fe, Ni, Mn, and Co) using a simple precipitation method followed by a hydrothermal treatment and a topotactic transformation via calcination. When these mesocrystals were used as the catalyst to produce trichlorosilane (TCS) via Si hydrochlorination reaction, they exhibited excellent catalytic performance with much increased Si conversion and TCS selectivity. In particular, the TCS yield was increased 19-fold than that of the catalyst-free process. The latter is the current industrial process. The efficiently catalytic property of these mesocrystals is attributed to the formation of well-defined nanoscale heterointerfaces that can effectively facilitate the charge transfer, and the generation of the compressive and tensile strain on CuO near the interfaces among different metal oxides. The synthetic approach developed here could be applicable to fabricate versatile complicated metal oxide mesocrystals as novel catalysts for various industrial chemical reactions. | Hezhi Liu Yongjun Ji Jing Li Yu Zhang Xueguang Wang Haijun Yu Dingsheng Wang Ziyi Zhong Lin Gu Guangwen Xu Yadong Li Fabing Su | 2020 | Nano Research2020,13,10: | 1 |