Tailoring SnO2 structures for enhanced Pd/SnO2 catalytic activity in low-concentration methane oxidation

被引：1
|
作者：
Hu, Weibo [1 ]
Chen, Wanru [2 ]
Shi, Jixin [2 ]
Lin, Chao [1 ,2 ]
Li, Xiaopeng [1 ,2 ]
机构：
[1] Ningbo Univ Technol, Sch New Energy, Ningbo 315336, Peoples R China
[2] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2024年 / 672卷
关键词：
low-concentration CH 4 oxidation; Pd/SnO; 2; catalysts; SnO; morphology; Catalyst design; SOLID-SOLUTION; CO; PD/CEO2; SUPPORT;
D O I：
10.1016/j.apsusc.2024.160875
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Tin dioxide (SnO2) nanorods, nanosheets, and nanoparticles were synthesized to explore the influence of morphology on the catalytic performance of Pd/SnO2 in CH4 oxidation. Among these, Pd/SnO2 nanorods exhibited superior activity, achieving the earliest onset of methane conversion (T10%at 227 degrees C) and complete conversion (T100% at 400 degrees C), compared to nanosheets and nanoparticles. The structure-activity study indicates that the nanorod morphology not only enhances the availability of active oxygen species and increases the Pd2+/ Pd4+ ratio, but also lowers the reduction temperature of Pd-O-Sn moieties. These features collectively enhance the oxidation of CH4. This study highlights the critical role of SnO2 morphology in optimizing the catalytic efficiency of Pd/SnO2, providing valuable insights for designing catalysts aimed at low-concentration CH4 oxidation.
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页数：7
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