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Updated: Jul 29, 2025

Aerosol-assisted Chemical Vapor Deposition of Metal Oxide Structures: Zinc Oxide Rods
Published on: September 14, 2017
Sulfur Dioxide Oxidation by Zinc and Zinc Oxide Nitrate/Nitrite Complexes in the Gas Phase: An Interplay between
Chiara Salvitti1, Nuno A G Bandeira2, Federico Pepi1
1Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le Aldo Moro 5, Rome, Italy.
Abstract:
Different oxidative pathways of sulfur dioxide promoted by ZnO(NO3 )2 - , Zn(NO3 )2 - and Zn(NO2 )(NO3 )- are revealed by a joint investigation by mass spectrometry and theoretical calculations. The reactions are triggered by [Zn2+ -O- ⋅]+ or by the low-valence Zn+ through oxygen ion transfer or electron transfer to SO2 , respectively. The NOx - ligands intervene in the oxidation only when sulfur dioxide is converted to SO3 - or SO2 - , leading to the formation of zinc sulfate and zinc sulfite coordinated to nitrate or nitrite anions. Kinetic analyses show that the reactions are fast and efficient, and theory discloses the elementary steps, namely oxygen ion transfer, oxygen atom transfer and electron transfer, occurring through similar energy landscapes for the three reactive anions.
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