Premium
Quantitative reduction of particulate nitrate to nitric oxide by a molybdenum catalyst: Implications for NO y measurements in the marine boundary layer
Author(s) -
Sadanaga Yasuhiro,
Imabayashi Hiroki,
Suzue Takahiko,
Kimoto Hideshi,
Kimoto Takashi,
Takenaka Norimichi,
Bandow Hiroshi
Publication year - 2008
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl035557
Subject(s) - nitrate , particulates , catalysis , molybdenum , reduction (mathematics) , nitric oxide , boundary layer , environmental chemistry , environmental science , inorganic chemistry , molybdenum oxide , layer (electronics) , atmospheric sciences , materials science , chemistry , geology , nanotechnology , physics , thermodynamics , organic chemistry , geometry , mathematics
NaNO 3 is one of the most important species in total odd nitrogen oxides (NO y ), especially with respect to nitrogen supply to the ocean as a nutrient. The reduction efficiencies ( RE ) of NaNO 3 by a molybdenum catalyst were measured in order to investigate the contribution of nitrates to the measurement of NO y . NaNO 3 particles with 3‐ μ m diameter were reduced to NO quantitatively by a molybdenum catalyst. However, RE decreased with particle diameter to 49.3 ± 9.1% (1 σ ) for NaNO 3 particles with 9‐ μ m diameter. Meanwhile, quantitative reduction was observed for NaNO 3 /NaCl particles regardless of particle diameter. RE was 92.6 ± 2.8% (1 σ ) for NaNO 3 /NaCl particles even as large as 12‐ μ m diameter. The decrease of RE with particle diameter for NaNO 3 is caused by the nitrate concentrations rather than particle diameter. We concluded that aerosols containing NaNO 3 can be converted quantitatively by a molybdenum catalyst in the atmosphere. The confirmation of such quantitative reduction is the first‐time.