Hydrogen effects on the electric conductivity of a Pt/Al2O3 catalyst

Abstract

AbsWa~Hydrogen desorption, hydrogen spillover and reduction processes have been evidenced using a new experimental strategy based on AC electric conductivity measurements during TPD and TPR experiments on a 0.5% Pt/A]2O3 catalyst.

AC electrical conductivity measurements during H2-TPD experiments on a Pt/Al2O3 catalyst

“…The peak located at around 200~ has been attributed by us in our previous papers [7,8] to charge transfer effects induced by desorption of a reversible chemisorbed hydrogen on platinum, while the higher temperature peak has been associated with the desorption of spilt-over hydrogen species. A very noticeable behavior in the second peak is that it reaches always almost same maximum conductance value.…”

“…This experimental set-up has been described elsewhere [7]. This experimental set-up has been described elsewhere [7].…”