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| 1 | Co掺杂对CuO/CeO_(2)-Co_(3)O_(4)优先氧化CO催化性能的影响显示文摘采用共沉淀-浸渍法制备了一系列不同Ce/Co物质的量比的CeO_(2)-Co_(3)O_(4)载体和CuO负载量(质量分数)为7%的CuO/CeO_(2)-Co_(3)O_(4)催化剂,考察了它们在富氢气氛中对CO的优先氧化性能。采用BET、XRD、H_(2)-TPR等对催化剂进行了表征。测试结果表明:Ce/(Co+Ce)物质的量比为0.9时,CuO/CeO_(2)-Co_(3)O_(4)催化剂活性最好。少量的Co掺杂有利于提高催化剂的比表面积和铜物种在载体上的分散,少量的Co进入了CeO_(2)的晶格,增强了钴铈相互作用,进而提高了载体的氧化还原性能。 | 白玮 李秀洁 彭占录 | 2021 | 石油与天然气化工2021，50，2： | 3 |
| 2 | Construction of mesoporous ceria-supported gold catalysts with rich oxygen vacancies for efficient CO oxidation显示文摘Bearing unique redox nature and high oxygen storage capacity,ceria(CeO_(2))has always been a promising CO oxidation catalyst support for gold(Au)catalysts and the like.Herein,a series of Au-CeO_(2)-P(P stands for pH value)samples was prepared by a co-precipitation method with the assistance of an alkaline environment and amino groups functionalized ordered mesoporous polymer(OMP-NH_(2)).Afterward,all samples described above were characterized that the Au-CeO_(2)-P catalysts are made of Au-Ce-O solid solution and Au nanoparticles(NPs)supported on CeO_(2).It turns out that OMP-NH_(2) is not just a simple sacrificial template for mesoporous structure,but also plays an important role as an amino source,explaining the presence of rich oxygen vacancies.Due to the concentration of oxygen vacancies in Au-Ce-O solid solution is the key factor for the oxygen mobility of CO oxidation,the catalytic results also demonstrate that the catalytic activity of Au-CeO_(2)-P catalysts is related to the concentration of their oxygen vacancies.Moreover,Au-CeO_(2)-9.6 with a highest concentration of oxygen vacancies(as high as 13.98%)in Au-CeO_(2)-P catalysts exhibits the best catalytic activity(complete conversion at 10℃). | Xin Shen Wang Li Shunmin Ding Xiaohua Ma Shaohua Wu Weiming Xiao Rong Zeng Sanguo Hong Chao Chen | 2022 | Journal of Rare Earths2022，40，3： | 2 |
| 3 | Role of cerium as a promoter and process optimization studies for dehydration of glycerol to acetol over copper chromite catalyst显示文摘Cerium-promoted silica supported copper chromite catalyst was synthesized from acid hydrolysis of sodium silicate by sol-gel method.The catalyst was characterized by Brunauer-Emmett-Teller(BET)method,field-emission scanning electron microscopy(FESEM),X-ray diffraction(XRD),H_(2)-temperature programmed reduction(H_(2)-TPR),NH3-temperature programmed desorption(NH3-TPD)and pyridine adsorbed Fourier transform infrared spectroscopy(Py-FTIR).Among cerium doped catalysts,5 wt%of Ce promoted copper chromite supported by 40 wt%of silica(SiCuCr40-Ce5)shows the largest BET surface area.XRD analysis of the reduced form of the catalyst shows both CeO_(2)/Ce_(2)O_(3) redox system and CuO/Cu_(2)O/Cu redox system.Py-FTIR shows the maximum number of Lewis acid sites for SiCuCr40-Ce5 than others.The highest acetol selectivity with analytical reagent(AR)grade glycerol conversion is observed for SiCuCr40-Ce5 at 200℃for 3 h in a batch reactor at atmospheric pressure.Cerium promotion lowers the reaction te mperature with enhanced glycerol conve rsion and increased acetol selectivity.Though the above catalyst shows higher conversion for laboratory reagent(LR)grade glycerol but it reduces acetol selectivity.The addition of glucose into the LR grade glycerol further reduces glycerol conversion and decreases the acetol selectivity to zero.This may be due to the presence of iron as impurity in LR grade glycerol.XRD analysis of spent catalyst shows the absence of redox catalytic system and the pore volume reduces identified by BET analysis.Raman analysis of the spent catalyst shows graphite-like carbon deposition in the spent catalvst. | S.Basu Vibha Shree A.K.Sen | 2022 | Journal of Rare Earths2022，40，1： | 0 |
| 4 | CO催化氧化催化剂的研究进展显示文摘综述了近年来CO催化氧化催化剂,包括铜基催化剂、钴基催化剂、复合催化剂的制备方法及其催化氧化CO的研究进展,并对CO催化氧化催化剂的未来研究方向进行了展望。铜基催化剂、钴基催化剂和复合催化剂均有各自的优势,但它们的综合性能还不能满足商业化应用的要求,未来还需进一步深入研究。 | 郝敏彤 孙维 张超 冯彬 乔韦军 | 2022 | 石油化工2022，51，11： | 0 |
| 5 | Effects of Y_(2)O_(3) and transition-metal nitrates on phase,microstructures and PL properties of N-containing Ce_(2)Si_(2.5)Al_(0.5)O_(3.5)N_(3.5) melilite显示文摘N-containing Ce_(2)Si_(2.5)Al_(0.5)O_(3.5)N_(3.5)(CeSiAlON) melilite was synthesized at 1550 and 1600℃ for 5 h from CeO_(2),Si,Al,and Al_(2)O_(3) in nitrogen by using Y_(2)O_(3) and transition-metal nitrates(Co(NO_(3))_(2)·6 H_(2) O and Ni(NO_(3))_(2)·6 H_(2)O) as additives.The effects of Y_(2)O_(3) and transition-metal nitrates on the phase,microstructures and photoluminescence properties of CeSiAlON melilite were studied.The incorporation of Y_(2)O_(3) can promote the reaction of raw materials to a low degree,and results in a unit cell shrinkage of CeSiAlON due to the smaller radius of Y atom than that of Ce atom.The transition-metal nitrates can accelerate the reaction clearly and facilitate the formation of CeSiAlON fibers.The photoluminescence(PL) properties of CeSiAlON melilite presents a board violet emission band because of the 5 d-4 f transitions of Ce^(3+),and the additives can enhance the PL emission intensities of specimen significantly. | Meng Zhang Zhihui Hu Zhi Chen Juntong Huang Qingming Xiong Renming Shuai Zhijun Feng Xibao Li | 2021 | Journal of Rare Earths2021，39，10： | 0 |
| 6 | CuO-Co_(3)O_(4)-CeO_(2)/CeO_(2)-Al_(2)O_(3)催化剂脱除CO性能研究显示文摘以CeO_(2)-Al_(2)O_(3)为载体,采用等体积浸渍法制备CuO-Co_(3)O_(4)-CeO_(2)/CeO_(2)-Al_(2)O_(3)催化剂,通过X射线衍射(XRD)、氢气程序升温还原(H_(2)-TPR)、氢气等温还原(H_(2)-TIR)、CO脱除性能评价等方法,考察预还原温度、反应温度、液相空速对CO脱除性能的影响。结果表明:催化剂在160℃下预还原可以获得37.3%的还原度,有效提高活性Cu^(+)的数量,进而提高CO脱除性能;在液相丙烯中微量CO脱除反应中,反应温度升高、液相空速减小有利于提高CO脱除性能,当反应温度不低于50℃,液相空速不高于8 h^(-1)时,CO体积分数可脱除至0.03 mL/m^(3)以下。在50℃、3 MPa,液相空速为8 h-1的反应条件下,CuO-Co_(3)O_(4)-CeO_(2)/CeO_(2)-Al_(2)O_(3)催化剂可将液相丙烯中CO由10 mL/m^(3)脱除至0.03 mL/m^(3)以下,且连续反应3500 min,稳定性良好。 | 黄金花 孙蕴婕 杨丙星 张荣 尹馨 黄姝玮 | 2023 | 上海塑料2023，51，4： | 0 |
| 7 | 钴基催化剂用于富氢条件下CO优先氧化研究进展显示文摘综述了钴基催化剂用于富氢条件下CO优先氧化的研究现状,总结了配位环境、金属-载体相互作用、应用环境等因素对催化性能的影响,分析了各种钴基催化剂的优势和不足,并为钴基催化剂未来的研究方向提供新思路。 | 王雅琪 李金晓 宋仁升 高伟 吕爽 潘立卫 | 2023 | 现代化工2023，43，9： | 0 |
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