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Hydrogen sensing in titanate nanotubes associated with modulation in protonic conduction

机译:钛酸酯纳米管中的氢感测与质子传导的调节有关

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Hydrogen/sodium titanate nanotubes (TNTs) were investigated as hydrogen (H_2) sensors. TNT films exhibit good sensing properties and a large response, in particular at room temperature. Electrical conductivity measurements performed under different atmospheres from 25 to 300 °C indicate that, for T > 100 °C, conduction is thermally activated and can be attributed to electronic transport, whereas for T < 100 °C conduction is dominated by protonic transport. The T dependence of the H_2 sensitivity was determined and related to this variation in the dominant transport mechanism. For low T, H_2 sensing originates from the modulation in protonic conduction. Such modulation was attributed to the creation/destruction of surface hydroxyl groups.
机译:氢/钛酸钠纳米管(TNTs)作为氢(H_2)传感器进行了研究。 TNT膜表现出良好的感测特性和较大的响应,特别是在室温下。在25至300°C的不同气氛下进行的电导率测量表明,对于T> 100°C,传导是热激活的,并且可以归因于电子传输,而对于T <100°C,传导主要由质子传输决定。确定了H_2敏感性的T依赖性,并与显性转运机制中的这种变化有关。对于低T,H_2感应源自质子传导中的调制。这种调节归因于表面羟基的产生/破坏。

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