Hydrogen-induced plasticity in nanoporous palladium
The mechanical strain response of nanoporous palladium (npPd) upon electrochemical hydrogenation using an in situ dilatometric technique is investigated. NpPd with an average ligament diameter of approximately 20 nm is produced via electrochemical dealloying. A hydrogen-induced phase transition from...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2018-12-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.9.280 |
| _version_ | 1811297266593431552 |
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| author | Markus Gößler Eva-Maria Steyskal Markus Stütz Norbert Enzinger Roland Würschum |
| author_facet | Markus Gößler Eva-Maria Steyskal Markus Stütz Norbert Enzinger Roland Würschum |
| author_sort | Markus Gößler |
| collection | DOAJ |
| description | The mechanical strain response of nanoporous palladium (npPd) upon electrochemical hydrogenation using an in situ dilatometric technique is investigated. NpPd with an average ligament diameter of approximately 20 nm is produced via electrochemical dealloying. A hydrogen-induced phase transition from PdHβ to PdHα is found to enable internal-stress plasticity (or transformation-mismatch plasticity) in nanoporous palladium, which leads to exceptionally high strains without fracture as a result of external forces. The high surface stress in the nanoporous structure in combination with the internal-stress plasticity mechanism leads to a peculiar strain response upon hydrogen sorption and desorption. Critical potentials for the formation of PdHα and PdHβ in npPd are determined. The theoretical concepts to assess the plastic strain response of nanoporous samples are elucidated, taking into account characteristics of structure and deformation mechanism. |
| first_indexed | 2024-04-13T06:01:28Z |
| format | Article |
| id | doaj.art-b5e1b40323884c798a64edd6e4a4bf1f |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-04-13T06:01:28Z |
| publishDate | 2018-12-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-b5e1b40323884c798a64edd6e4a4bf1f2022-12-22T02:59:25ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862018-12-01913013302410.3762/bjnano.9.2802190-4286-9-280Hydrogen-induced plasticity in nanoporous palladiumMarkus Gößler0Eva-Maria Steyskal1Markus Stütz2Norbert Enzinger3Roland Würschum4Institute of Materials Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, AustriaInstitute of Materials Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, AustriaInstitute of Materials Science, Joining and Forming, Graz University of Technology, Kopernikusgasse 24/I, A-8010 Graz, AustriaInstitute of Materials Science, Joining and Forming, Graz University of Technology, Kopernikusgasse 24/I, A-8010 Graz, AustriaInstitute of Materials Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, AustriaThe mechanical strain response of nanoporous palladium (npPd) upon electrochemical hydrogenation using an in situ dilatometric technique is investigated. NpPd with an average ligament diameter of approximately 20 nm is produced via electrochemical dealloying. A hydrogen-induced phase transition from PdHβ to PdHα is found to enable internal-stress plasticity (or transformation-mismatch plasticity) in nanoporous palladium, which leads to exceptionally high strains without fracture as a result of external forces. The high surface stress in the nanoporous structure in combination with the internal-stress plasticity mechanism leads to a peculiar strain response upon hydrogen sorption and desorption. Critical potentials for the formation of PdHα and PdHβ in npPd are determined. The theoretical concepts to assess the plastic strain response of nanoporous samples are elucidated, taking into account characteristics of structure and deformation mechanism.https://doi.org/10.3762/bjnano.9.280electrochemistryhydride formationin situ dilatometryinternal-stress plasticitynanoporous palladium |
| spellingShingle | Markus Gößler Eva-Maria Steyskal Markus Stütz Norbert Enzinger Roland Würschum Hydrogen-induced plasticity in nanoporous palladium Beilstein Journal of Nanotechnology electrochemistry hydride formation in situ dilatometry internal-stress plasticity nanoporous palladium |
| title | Hydrogen-induced plasticity in nanoporous palladium |
| title_full | Hydrogen-induced plasticity in nanoporous palladium |
| title_fullStr | Hydrogen-induced plasticity in nanoporous palladium |
| title_full_unstemmed | Hydrogen-induced plasticity in nanoporous palladium |
| title_short | Hydrogen-induced plasticity in nanoporous palladium |
| title_sort | hydrogen induced plasticity in nanoporous palladium |
| topic | electrochemistry hydride formation in situ dilatometry internal-stress plasticity nanoporous palladium |
| url | https://doi.org/10.3762/bjnano.9.280 |
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