Aqueous electrochemical insertion of Na+ into the tungsten oxide hybrid WO3(4,4′-bipyridyl)0.5
Aqueous electrochemical insertion of Na+ into the tungsten oxide hybrid WO3(4,4′-bipyridyl)0.5
复制标题
DOI：
10.1016/j.jpcs.2009.12.081
复制
发表时间：
2010-03-01
影响因子：
4
通讯作者：
Tallon, J. L.
中科院分区：
文献类型：
--
作者：
Chong, S. V.;Tallon, J. L.
研究了M+ （Na+和H+）物质在WO3（4,4′-联吡啶基）（0.5）中的水溶液电化学插入。用x射线光电子能谱（XPS）和x射线衍射（XRD）分析了产物的化学状态和结构。XPS显示W6+以及通常的还原W （W5+）的存在，这是导致颜色变化的原因。此外，这些插入物的存在与还原W物种的进化有关。粉末x射线衍射测定的层状杂化物的体结构在电化学处理后没有变化，而在三氧化钨（WO3）上进行了相同的测量。然而，这与单晶x射线的研究结果一致，表明Na+插入对晶格参数的影响很小。电化学后，层状杂化涂层的四探针电阻测量结果显示电阻下降，这可能是由于在导带中注入了载流子。2009爱思唯尔有限公司版权所有。
Aqueous electrochemical insertion of M+ (Na+ and H+) species into WO3(4,4 '-bipyridyl)(0.5) has been carried out. The chemical states and structure of the resulting product were analysed by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). XPS showed the presence of W6+ as well as the usual reduced W species (W5+) which is responsible for a change in colour. Moreover, the presence of these intercalates correlates with the evolution of the reduced W species. The bulk structure of the layered hybrid, as determined by powder X-ray diffraction, showed no alteration after electrochemistry, in contrast to the same measurements on tungsten trioxide (WO3). This however concurs with single-crystal X-ray studies, which show little change in lattice parameters with Na+ insertion. Four-probe resistance measurements of the layered hybrid coated film display a drop in resistance after electrochemistry, which can be attributed to the injection of charge-carriers into the conduction band. (C) 2009 Elsevier Ltd. All rights reserved.