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Hafnium—an optical hydrogen sensor spanning six orders in pressure
| Content Provider | Semantic Scholar |
|---|---|
| Author | Boelsma, Christiaan Bannenberg, Lars Johannes Setten, Michiel J. Van Steinke, N.-J. Well, Ad A. Van Dam, Bernard |
| Copyright Year | 2017 |
| Abstract | Hydrogen detection is essential for its implementation as an energy vector. So far, palladium is considered to be the most effective hydrogen sensing material. Here we show that palladium-capped hafnium thin films show a highly reproducible change in optical transmission in response to a hydrogen exposure ranging over six orders of magnitude in pressure. The optical signal is hysteresis-free within this range, which includes a transition between two structural phases. A temperature change results in a uniform shift of the optical signal. This, to our knowledge unique, feature facilitates the sensor calibration and suggests a constant hydrogenation enthalpy. In addition, it suggests an anomalously steep increase of the entropy with the hydrogen/metal ratio that cannot be explained on the basis of a classical solid solution model. The optical behaviour as a function of its hydrogen content makes hafnium well-suited for use as a hydrogen detection material. |
| Starting Page | 11925 |
| Ending Page | 11940 |
| Page Count | 16 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.nature.com/articles/ncomms15718.pdf?code=4a68f9b9-441e-44fd-a9f7-e65c1067d61c&error=cookies_not_supported |
| PubMed reference number | 28580959v1 |
| Alternate Webpage(s) | https://doi.org/10.1038/ncomms15718 |
| DOI | 10.1038/ncomms15718 |
| Journal | Nature communications |
| Volume Number | 8 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Hafnium Hydrogenation Palladium orders - HL7PublishingDomain |
| Content Type | Text |
| Resource Type | Article |
