Infrared and X-ray studies of hydrogen intercalation in different tungsten trioxides and tungsten trioxide hydrates
Infrared and X-ray studies of hydrogen intercalation in different tungsten trioxides and tungsten trioxide hydrates
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DOI：
10.1007/s100080050049
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发表时间：
1997-12-01
影响因子：
2.5
通讯作者：
Lassegues, JC
中科院分区：
文献类型：
--
作者：
Guery, C;Choquet, C;Lassegues, JC
氢通过溢出反应嵌入到各种三氧化钨中，导致蓝色氢青铜的形成。这些可逆反应在保持W-O骨架的同时引起W-O键系统的变化。通过红外和X射线衍射测量，研究了插层过程对基质晶体结构的影响，包括v（O-W-O）伸缩振动的变化和晶格参数的变化。其中的主要结果，插层过程被证明是强烈的主体化合物的结构类型，以及其非晶与结晶性质的影响。例如，对于ReO 3型氧化物（单斜晶系和立方晶系WO 3）和六方晶系WO 3，v（O-W-O）向更高频率的移动被归因于W-O键的缩短效应。一个W-O键系统的安排也测量结晶和非晶水合物WO 3。H2O，但没有检测到的变化，可以发现在烧绿石WO 3和水合WO 3。1/3水。
Hydrogen intercalation via spillover reaction in various tungsten trioxides leads to the formation of blue hydrogen bronzes. These reversible reactions induce changes in the W-O bond system while maintaining the W-O skeleton. The effect of the intercalation process on the host crystalline structure has been studied with respect to the v(O-W-O) stretching vibration changes and lattice parameter variations by means of infrared and X-ray diffraction measurements. Among the main results, the intercalation process is shown to be strongly influenced by the structural type of the host compound as well as its amorphous versus crystalline nature. For instance, for the ReO3 type oxides (monoclinic and cubic WO3) and hexagonal WO3, v(O-W-O) shifts to higher frequency are assigned to a shortening effect of W-O bonds. A W-O bond system arrangement is also measured for the crystallized and amorphous hydrates WO3 . H2O, but no detectable changes could be found in the pyrochlore WO3 and in the hydrate WO3 . 1/3 H2O.