Deciphering CO oxidation on SnO2 nanosheets: A multinuclear solid-state NMR spectroscopic approach

被引：6

作者：

Wang, Xiang ^{[1
,2
]}

Qi, Guodong ^{[1
]}

Wang, Qiang ^{[1
]}

Xu, Jun ^{[1
]}

Deng, Feng ^{[1
]}

机构：

[1] Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, Wuhan Inst Phys & Math, Natl Ctr Magnet Resonance Wuhan,State Key Lab Magn, Wuhan 430071, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

ARKIVOC | 2024年

基金：

中国国家自然科学基金;

关键词：

CO oxidation; SnO2; nanosheets; active sites; mechanism; NMR spectroscopy; LOW-TEMPERATURE OXIDATION; RESOLUTION SN-119 NMR; ACTIVE-SITES; ACID SITES; CATALYSTS; OXYGEN; OXIDE; IDENTIFICATION; ZEOLITES; SHIFT;

D O I：

10.24820/ark.5550190.p012.152

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

SnO2 nanosheets exhibit exceptional low -temperature CO oxidation activity, yet the nature of their active sites remains enigmatic. Employing solid-state 119Sn and O-17 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 O-2 into a critical bidentate eta(2)-O-2 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.

引用

页码：1 / 14

页数：14

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