Pd-Pt nanoparticles for plasmonic sensing of hydrogen in humid environments
Författare
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Using hydrogen as energy storage and as fuel in fuel cells are attractive ideas that
have been investigated for decades. One of the big problems with using hydrogen
for this purpose is that hydrogen, due to its small size, can easily escape from its
containers, and only low concentrations are required for it to be explosive when
mixed with oxygen. To help detect leaks and prevent accidents, a fast and reliable
method for the detection of hydrogen gas is necessary. One of the most commonly
used materials for this purpose is Pd, due to its ability to absorb H into interstitial
sites in its lattice. The problem with Pd is that it is vulnerable to deactivation
by several different compounds, one of which being water. This thesis aims to
investigate a solution to this by incorporating Pt into the system. Several different
compositions were fabricated (Pd70Pt30, Pd85Pt15, Pd90Pt10 and Pd95Pt5), and
tested both as a bi-layered structure and alloyed together, in a humidity reactor.
All systems show potential as hydrogen sensors in humid environments. However,
how to clearly translate the complex signal output into readings of H2 concentration
remains unclear.
Beskrivning
Ämne/nyckelord
Hydrogen, sensing, nanoparticles, palladium, platinum