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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Sensing hydrogen in the gas phase using ferromagnetic Pd-Co films
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Sensing hydrogen in the gas phase using ferromagnetic Pd-Co films

机译：使用铁磁Pd-Co膜感应气相中的氢

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It is demonstrated that Pd-Co films can be used to sense the hydrogen concentration in the gas phase using the changes in the magnetic susceptibility, caused by the hydrogen uptake at ambient temperature. The induced voltage, which is proportional to the magnetic susceptibility of the Pd-Co films, was changed by the hydrogen concentration under the flow of the hydrogenitrogen mixture, and saturated under a constant flow. The saturated value of the induced voltage decreased with the hydrogen concentration in the gas phase and the change in the induced voltage was detected at a hydrogen concentration of 0.2 vol%. Under the flow of dry air, the induced voltage also reacted to hydrogen. However, the induced voltage did not have a clear change under a hydrogen concentration of 0.2 vol% in dry air. Moreover, the response time it took to reach saturation, from the injection of hydrogen, was slower than that under a hydrogenitrogen mixture. This behavior was likely caused by the water-forming reactions, hindering the absorption of hydrogen in the Pd-Co films in the presence of oxygen. (C) 2015 Elsevier B.V. All rights reserved.
机译：已经证明，Pd-Co膜可用于利用由环境温度下的氢吸收引起的磁化率变化来感测气相中的氢浓度。感应电压与Pd-Co膜的磁化率成正比，在氢/氮混合物的流动下，氢的浓度会改变感应电压，在恒定的流动下，感应电压会饱和。感应电压的饱和值随着气相中的氢浓度而降低，并且在0.2vol％的氢浓度下检测到感应电压的变化。在干燥空气的流动下，感应电压也与氢发生反应。但是，在干燥空气中氢浓度为0.2体积％时，感应电压没有明显变化。而且，从注入氢气到达到饱和所需的响应时间比在氢气/氮气混合物下的响应时间慢。此行为可能是由水形成反应引起的，从而阻碍了氧气存在下Pd-Co膜中氢的吸收。 （C）2015 Elsevier B.V.保留所有权利。

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