Identification of the fixed nitrogen containing species during the photo‐oxidative fixation of molecular nitrogen on UV‐illuminated TiO 2  surfaces | Zendy

Navio J. A. | Zendy; Real C. | Zendy; Bickley R. I. | Zendy

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Identification of the fixed nitrogen containing species during the photo‐oxidative fixation of molecular nitrogen on UV‐illuminated TiO 2 surfaces

Author(s) -

Navio J. A.,

Real C.,

Bickley R. I.

Publication year - 1994

Publication title -

surface and interface analysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.52

H-Index - 90

eISSN - 1096-9918

pISSN - 0142-2421

DOI - 10.1002/sia.740220190

Subject(s) - x ray photoelectron spectroscopy , nitrogen , photoexcitation , chemistry , ultraviolet , adsorption , titanium oxide , nitrogen fixation , ion , photochemistry , crystallite , nitrogen oxides , analytical chemistry (journal) , inorganic chemistry , crystallography , materials science , organic chemistry , chemical engineering , excited state , optoelectronics , engineering , physics , nuclear physics , waste management

Ultraviolet photoexcitation of hydroxylated TiO 2 surfaces in the presence of a mixture on N 2 /O 2 gas (air) produces some adsorbed nitrogen oxide species which were previously assigned indirectly as probably N 2 O 2 2− . Direct assignment is now reported here. From comparisons of the thermodesorption profiles and the XPS results from polycrystalline Na 2 N 2 O 2 and from the corresponding data obtained from TiO 2 surface upon which Na 2 N 2 O 2 had been allowed to adsorb with the thermodesorption profile and XPS data obtained from the photo‐induced fixation of nitrogen on TiO 2 , it can be concluded that the principal species formed during the photo‐oxidative fixation of molecular nitrogen on TiO 2 is hyponitrite anion, N 2 O 2 2− .

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