In Situ Spectroscopic Studies of NH₃ Oxidation of Fe-Oxide/Al₂O₃.

ABSTRACT: Simple temperature-regulated chemical vapor deposition was used to disperse iron oxide nanoparticles on porous Al₂O₃ to create an Fe-oxide/Al₂O₃ structure for catalytic NH₃ oxidation. The Fe-oxide/Al₂O₃ achieved nearly 100% removal of NH₃, with N₂ as a major reaction product at temperatures above 400 °C and negligible NO_x emissions at all experimental temperatures. The results of a combination of in situ diffuse reflectance infrared Fourier-transform spectroscopy and near-ambient pressure-near-edge X-ray absorption fine structure spectroscopy suggest a N₂H₄-mediated oxidation mechanism of NH₃ to N₂ via the Mars-van Krevelen pathway

SUBMITTER: Cha BJ 

PROVIDER: S-EPMC10210185 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature