Molecular beam-thermal hydrogen desorption from palladium
- Grupo de Nanotecnologia e Ciencia a Nano-Escala, Faculdade de Ciencias e Tecnologia da Universidade Nova de Lisboa, 2829-516 Caparica, Portugal and Instituto de Ciencia e Tecnologia de Materiais e Superficies (ICEMS), Av. Rovisco Pais, IST, 1049-001 Lisboa (Portugal)
Among the most efficient techniques for hydrogen desorption monitoring, thermal desorption mass spectrometry is a very sensitive one, but in certain cases can give rise to uptake misleading results due to residual hydrogen partial pressure background variations. In this work one develops a novel thermal desorption variant based on the effusive molecular beam technique that represents a significant improvement in the accurate determination of hydrogen mass absorbed on a solid sample. The enhancement in the signal-to-noise ratio for trace hydrogen is on the order of 20%, and no previous calibration with a chemical standard is required. The kinetic information obtained from the hydrogen desorption mass spectra (at a constant heating rate of 1 deg. C/min) accounts for the consistency of the technique.
- OSTI ID:
- 22053969
- Journal Information:
- Review of Scientific Instruments, Vol. 81, Issue 4; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multivariate analysis of progressive thermal desorption coupled gas chromatography-mass spectrometry.
Preparation and thermal desorption properties of dc sputtered zirconium-hydrogen-helium thin films