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 |
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Pages (from-to) | 2496-2509 |
Number of pages | 14 |
Journal | Materials |
Volume | 2 |
Issue number | 4 |
DOIs | |
State | Published - 2009 |
Keywords
- Dealloying
- Hydridation
- Nanoporous
- Palladium
ASJC Scopus subject areas
- Materials Science (all)