Abstract
The comparative study of the activity of mono- and bimetallic Pt–(M)/Al2O3 catalysts in perhydro-N-ethylcarbazole dehydrogenation as the second stage of hydrogen storage (hydrogen release) has been performed. It has been found that the activity of a Pt/Al2O3 catalyst can be enhanced via the second metal (Cr, Pd) introduction. This fact gives the possibility to use Pt–(M)/Al2O3 catalysts for the hydrogen storage process based on reversible cycles of hydrogenation–dehydrogenation of aromatic substrates. X-ray absorption spectroscopy (XANES and EXAFS) revealed that Cr introduction impacts the electronic state and local environment of Pt. The average size of platinum metal nanoparticles is about two times smaller in Pt–Cr/Al2O3 compared to Pt/Al2O3.
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