Abstract
Nanoporous Pd (np-Pd) was prepared by co-sputtering Pd-Ni alloy films onto Si substrates, followed by chemical dealloying with sulfuric acid. X-ray diffractometry and chemical analysis were used to track the extent of dealloying. The np-Pd structure was changed from particle-like to sponge-like by diluting the sulfuric acid etchant. Using suitable precursor alloy composition and dealloying conditions, np-Pd films were prepared with uniform and open sponge-like structures, with interconnected ligaments and no cracks, yielding a large amount of surface area for reactions with hydrogen. Np-Pd films exhibited shorter response time for hydrogen absorption/desorption than dense Pd films, showing promise for hydrogen sensing.
| Original language | English |
|---|---|
| Pages (from-to) | 2496-2509 |
| Number of pages | 14 |
| Journal | Materials |
| Volume | 2 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2009 |
Funding
| Funders | Funder number |
|---|---|
| U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China | 0847693 |
Keywords
- Dealloying
- Hydridation
- Nanoporous
- Palladium
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
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