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非晶态金属合金作催化材料的研究I:N-P非晶态合金对苯乙烯加氢活性的研究 总被引:10,自引:0,他引:10
本文用X射线光电子能谱(XPS), X射线衍射(XRD)和连续微型反应器等方法研究了以骤冷法制备的Ni-P非晶态催化剂的表面结构和加氢活性。结果表明, 非晶态Ni-P对于苯乙烯催化加氢具有很高的反应活性, 优于晶态Ni-P, 更优于Ni片, 催化剂表面不同的预处理条件, 对反应活性影响很大。XPS结果表明, 在适当的预处理条件下, 非晶态Ni-P被部分氧化;随着氧化态被还原, 反应活性逐渐下降。 相似文献
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本文为了进一步了解具有生物活性的木杨醛缩氨基硫脲在溶液中与常见金属离子的作用本质, 在半微量恒温滴定池上用PH电位法研究了该物质与铜(II)、锌(II)、镍(II)、钴(II)、锰(II)及镉(II)等二价金属离子的配位作用. 相似文献
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用Ni(salen)与铵盐NH~4X(X=SCN.Cl,Br,I或I~3)在乙醇中反应,分别制得了如下组成的新化合物:2Ni(salen).NH~4SCN.2Ni(salen).NH~4Cl.2Ni(salen).NH~4Br.C~2H~5OH,2Ni(salen).NH~4I.C~2H~5OH和3Ni(salen).2NH~4I~3.C~2H~5OH,并以热重,摩尔电导,磁化率,红外和紫外可见光谱等方法对加合物进行了性质表征.研究结果表明,在这些加合物中,Ni(salen)的四方平面结构仍然保持,没有形成新的轴向Ni-X配键.讨论了加合物中的一种新型键合方式,它是以Ni(salen)的酚氧与NH4X中的铵离子形成氢键. 相似文献
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The stepwise formation constants of complex compounds formed from N-(m-substituted-phenyl) glycines (m-RC6H4NHCH2COOH(m-RPhG), R = H, CH3, CH3O, Cl, NO2) with Cu(II) and Ni(II) were determined by pH method at 15, 25 35`C in 30% (V/V) ethanol solution in the presence of 0.1m NaClO4. Their thermodynamical parameters were calculated. It was found that the N-(m-substituted-phenyl) glycine complexes also showed linear free energy relationships between the stability of complex compounds and the base strength of the ligands just as the para-substituted isomers reported previously. Linear relationships not only existed between their thermodynamical parameters and the base strength of the ligands but also existed between the formation enthalpy of complex compounds and the neutralization enthalpy of the ligands and between the formation entropy of complex compounds and neutralization entropy of the ligands as well. 相似文献
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