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| 1 | Sm^(3+)掺杂对Sm_xNiCo_(0.2)Mn_(1.8)O_4热敏陶瓷性能的影响显示文摘采用室温固相法和烧结工艺制备Sm_xNiCo_(0.2)Mn_(1.8)O_4(0≤x≤0.05)负温度系数热敏陶瓷,用XRD和XPS等手段对其进行表征,研究了Sm^(3+)掺杂对其电性能的影响。结果表明,当Sm^(3+)掺杂量较低时(x≤0.02),可以制备出单一的尖晶石相,Sm^(3+)取代尖晶石相八面体间隙中Mn^(3+)有利于获得高热稳定性的尖晶石相;当Sm^(3+)掺杂量x≥0.03时,相继出现SmMnO_3和SmMn_2O_5两杂相,导致Sm_xNiCo_(0.2)Mn_(1.8)O_4热敏陶瓷的热稳定性明显降低。 | 国娜 李亚东 | 2011 | 材料研究学报2011，25，2： | 1 |
| 2 | Synthesis and characterization of Pt-MoO_x-TiO_2 electrodes for direct ethanol fuel cells显示文摘To enhance the CO-tolerance performance of anode catalysts for direct ethanol fuel cells,carbon nanotubes were modified by titanium dioxide (donated as CNTs@TiO2) and subsequently served as the support for the preparation of Pt/CNTs@TiO2 and Pt-Mo/CNTs@TiO2 electrocatalysts via a UV-photoreduction method.The physicochemical characterizations of the catalysts were carried out by using X-ray diffraction (XRD),transmission electron microscopy (TEM),X-ray photoelectron spectroscopy (XPS),and infrared spectroscopy of adsorbed probe ammonia molecules.The electrocatalytic properties of the catalysts for methanol oxidation were investigated by the cyclic voltammetry technique.The results show that Pt-Mo/CNTs@TiO2 electrode exhibits the highest performance in all the electrodes.It is explained that,the structure,the oxidation states,and the acid-base properties of the catalysts are influenced due to the strong interaction between Ti and Mo species by adding TiO2 and MoOx to the Pt-based catalysts. | Xiu-yu Wang Jing-chang Zhang Xu-dong Cao Yuan-sheng Jiang Hong Zhu | 2011 | International Journal of Minerals,Metallurgy and Materials2011，18，5： | 0 |
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