English to German Science Chemistry; Chem Sci/Eng Metallkatalysatoren

Accessibility Analysis

As seen in Fig. 2, the results indicate that the
45Al/Pd/Al2O3-200 °C catalyst was completely covered
by the alumina over-coat, thereby, minimizing the accessibility
of the CO molecule. The results for the
45Al/Pd/Al2O3-500 °C and 45Al/Pd/Al2O3-700 °C indicate
that as the temperature during calcining increases,
the accessibility of the CO molecule also increases. The
capacity of the CO peak of 45Al/Pd/Al2O3-700 °C is in
the same order of the uncoated sample Pd/Al2O3, indicating
that the alumina over-coat became porous to allow
Pd nanoparticles to become reaccessible after the calincation
treatments.