Abstract
The adsorption and absorption of hydrogen on and in various forms of supported and unsupported palladium were studied using heat-flow calorimetry. The supports were found to have a tremendous effect on the nature of the hydrogen-palladium system. For palladium supported on silica or alumina, irreversible chemisorption was found to take place and be followed by bulk hydride formation. In contrast, it was found for carbon-supported particles that chemisorption does not take place and that the observed behavior could be explained by a model using only bulk hydride formation. It was further found that the heat of formation and equilibrium for β-hydride formation are functions of particle size. It was not clear if surface adsorption takes place on unsupported palladium.
Original language | English (US) |
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Pages (from-to) | 984-992 |
Number of pages | 9 |
Journal | Langmuir |
Volume | 9 |
Issue number | 4 |
DOIs | |
State | Published - 1993 |
All Science Journal Classification (ASJC) codes
- General Materials Science
- Condensed Matter Physics
- Surfaces and Interfaces
- Spectroscopy
- Electrochemistry