Answers are grounded in this paper and cite their sources.
Selective catalytic oxidation of NH 3 to give N 2 under UV irradiation (photo-SCO) takes place at a low temperature over the TiO 2 catalyst. An active site for the photo-SCO is a Lewis acid site on TiO 2, and adsorption of NH 3 to the Lewis acid site is the first step in the photo-SCO. The adsorbed NH 3 on the Lewis acid site is activated under UV irradiation to generate NH 2 radical and Ti−OH (Brønsted acid site). The formed NH 2 radical reacts with an oxygen anion radical species formed under UV irradiation resulting in the formation of NO. The NO is changed to surface NO 2 -, nitro, and NO 3 - (monodentate and bidentate) species by a reaction with O 2 . The generated monodentate and bidentate NO 3 - species, nitro species, and NO react with the NH 2 radical to produce N 2 selectively via nitrosoamide species. Additionally, NH 4 + generated under the photo-SCO also reacts with NO x (maybe NO 3 - species) and would produce N 2 under photoirradiation. A small amount of N 2 O is produced when Ti 3+ reacts with NO instead of O 2 .
No takes yet. Share an insight, caveat, or question.
Yamazoe et al. (2007) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: