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| 1 | Research advances of rare earth catalysts for catalytic purification of vehicle exhausts-Commemorating the 100th anniversary of the birth of Academician Guangxian Xu显示文摘Nowadays,air pollution has become a prominent environmental problem and has attracted much attention.With the increase of vehicle retention quantity,the exhaust emissions have become the main sources of air pollution.To reduce pollution and hazards,vehicle exhaust emission regulations are becoming stricter and stricter,which puts forward higher requirements for purification of vehicle exhausts.At present,rare earths have been widely applied in vehicle exhaust purification because of their good catalytic performance,which is attributed to their unique 4 f electron layer structure occupied without full electrons,excellent oxygen storage/release capacity and redox ability.In this paper,the current status of rare earth catalysts and application of rare earth in different fuel vehicle exhaust catalysts,including three-way catalysts(TWCs)for gasoline vehicles,diesel exhaust catalysts for different pollutants(particulate matter(PM),NOx,CO and HC)and catalysts for new energy vehicles with different fuels,are summarized in detail.Meanwhile,the corresponding mechanisms and the role of rare earth in vehicle exhaust catalysts are also simultaneously described.Furthermore,the challenges and development directions of rare earth catalysts for the purification of vehicle exhausts are also proposed. | Lanyi Wang Xuehua Yu Yuechang Wei Jian Liu Zhen Zhao | 2021 | Journal of Rare Earths2021，39，10： | 6 |
| 2 | Effects of La_2O_3 contents on the Pd/Ce_(0.8)Zr_(0.2)O_2-La_2O_3 catalysts for methanol decomposition显示文摘The catalytic behaviors of Pd (1.4 wt.%) catalysts supported on CeO2-ZrO2 promoted with La2O3 were investigated for methanol decomposition. The measurements of inductively coupled plasma emission spectroscopy (ICP), N2 adsorption-desorption (BET), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR) and oxygen storage capacity (OSC) were used to characterize the properties of catalysts. The catalysts' activities were tested in a fixed bed continuous flow reactor operating under atmospheric pressure. The Pd/Ce0.8Zr0.2O2-5 wt.%La2O3 catalyst exhibited the best activity. The reasons for this were twofold: (1) doping of La improved effectively textural properties of CeO2-ZrO2 oxygen storage materials, and (2) Pd/Ce0.8Zr0.2O2-5 wt.%La2O3 possessed super oxygen storage property and reducibility due to the existence of lattice defect oxygen or mobile oxygen, which helped to re-oxidize zerovalent Pd0 to a partly oxidized Pdδ+. By introducing 5 wt.%La2O3, the specific surface area of the sample increased, but declined if further increasing the content of La2O3 to 10 wt.%. | 李雪 张利华 张超 赵明 龚茂初 陈耀强 | 2011 | Journal of Rare Earths2011，29，6： | 2 |
| 3 | 表面活性剂在共沉淀法制备Ce_(0.27)Zr_(0.18)Y_(0.025)La_(0.025)Al_(0.5)O_x中的成孔作用显示文摘以十六烷基三甲基溴化铵(CTAB)和聚乙二醇(PEG)作为表面活性剂,采用共沉淀法制备了Ce0.27Zr0.18Y0.025La0.025Al0.5Ox(CZYLA)材料,详细考察了表面活性剂的种类和添加方式对材料成孔的影响,并推测了成孔机理。采用X射线衍射(XRD),比表面(BET)测定,热重-差热分析(TG-DTA),透射电子显微镜(TEM)对材料进行了表征。结果表明:表面活性剂的添加没有改变材料的物相,均形成立方相铈锆固溶体,经1 000℃高温焙烧后无相分离;采用CTAB和PEG合成的材料经600℃焙烧后分别形成直径为6.6 nm的柱状孔和5.0 nm的狭缝孔;同时表面活性剂可以使部分晶粒由球状变成纤维状,经1 000℃高温老化5 h后采用CTAB制备的材料仍然保持了部分纤维状晶粒,从而维持了部分直径2~5 nm的孔,比表面积可达38.5 m2/g;在沉淀过程中加入表面活性剂对材料的孔结构起决定性作用。 | 刘建英 赵明 徐成华 张雪乔 谭显东 龚茂初 陈耀强 | 2012 | 四川大学学报(工程科学版)2012，44，3： | 1 |
| 4 | 软碳电池储能电站低温特性的实验研究显示文摘研究了电池内阻及制造工艺两方面对锂电池低温特性的影响,在已有锂电池的基础上提出一种新型结构软碳——球型结构软碳作为负极材料,制备锂电池并通过实验验证其对低温性能的影响。实验证明,软碳材料电池具有优秀的低温性能,这为扩大锂离子电池的应用范围提供了可能。 | 王东 张洪信 赵清海 徐方超 黄福闯 | 2019 | 机械制造与自动化2019，48，5： | 0 |
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