2013 Fiscal Year Final Research Report
Development of high performance hydrogen sensors using noble metal added nanoporous oxides
| Project/Area Number |
24656431
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Material processing/treatments
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| Research Institution | Tohoku University |
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Principal Investigator |
HARA NOBUYOSHI 東北大学, 工学(系)研究科(研究院), 教授 (40111257)
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| Co-Investigator(Kenkyū-buntansha) |
MUTO Izumi 東北大学, 大学院工学研究科, 教授 (20400278)
SUGAWARA Yu 東北大学, 大学院工学研究科, 助教 (40599057)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 表面・界面制御 / 化学センサ / ナノポーラス材料 / 脱合金化 / 水素ガス / 貴金属 |
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| Research Abstract |
In order to develop hydrogen gas sensors with superior response characteristics, a new fabrication technique of nanopoprous oxides containing noble metal nanoparticles has been examined. Amorphous Ti-xCu (x=30-60at%) alloys containing a small amount of noble metals such as Au, Ag, Pd, Pt were used as a starting material and dealloying treatments were applied to form nanoporous Cu or Ti with bimodal structures consisting of ligaments and pores. The dealloying in HF solutions resulted in the formation of nanoporous Cu with bimodal structures enriched with noble metals. The addition of a few at% noble metals effectively reduced the size of pores to a few nm. The dealloying in HCl-HNO3 mixtures leaded to the production of a Ti enriched nanoporous Ti-Cu alloy covered with Ti oxide films.
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