Title

Deciphering CO oxidation on SnO<sub>2</sub> nanosheets: A multinuclear solid-state NMR spectroscopic approach.

Authors

Xiang Wang; Guodong Qi; Qiang Wang; Jun Xu; Feng Deng

Abstract

SnO2 nanosheets exhibit exceptional low-temperature CO oxidation activity, yet the nature of their active sites remains enigmatic. Employing solid-state 119Sn and 17O NMR spectroscopy, we deconstructed the intricate structure of active Sn and oxygen species involved in this process. We identified diverse Sn and O environments, revealing surface SnIV sites capable of activating O2 into a critical bidentate 2-O2 species responsible for CO conversion into CO2. In-situ FT-IR spectroscopy studies further revealed the involvement of a carbonate-mediated Mars-van Krevelen mechanism.

Subjects

NUCLEAR magnetic resonance spectroscopy; STANNIC oxide; NANOSTRUCTURED materials; TIN; CARBON dioxide

Publication

ARKIVOC: Online Journal of Organic Chemistry, 2024, Vol 2024, p1

ISSN

1551-7004

Publication type

Academic Journal

DOI

10.24820/ark.5550190.p012.152