Nitrogen was chemisorbed on a Pt/Al2O3 catalyst by a plasma discharge of N2, and the chemical reactivity of the chemisorbed nitrogen with hydrogen was studied by temperature-programmed desorption (TPD) and infrared (IR) spectroscopy. The adsorbed nitrogen was desorbed at around 200°C by TPD, and a part of the adsorbed species was reacted with hydrogen to form NH3. IR spectroscopy showed an absorption band at 2260 cm−1, which was assigned to N-N streching of molecular N2(a) chemisorbed mainly on the Al2O3 support. It was suggested that the N2(a) reacted with the spiltover hydrogen from Pt surface even at room temperature.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry