Morphology Effects of Nanoscale Er2O3 and Sr-Er2O3 Catalysts for Oxidative Coupling of Methane
Er 2 O 3 nanorods were prepared by a hydrothermal method, and Sr-modified Er 2 O 3 nanorods (Sr-Er 2 O 3 ) were synthesized using an impregnation method. Their catalytic performance for oxidative coupling of methane was investigated. The catalysts were characterized by several techniques such as XRD...
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| Veröffentlicht in: | Catalysis letters 2021-08, Vol.151 (8), p.2197-2206 |
|---|---|
| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Er
2
O
3
nanorods were prepared by a hydrothermal method, and Sr-modified Er
2
O
3
nanorods (Sr-Er
2
O
3
) were synthesized using an impregnation method. Their catalytic performance for oxidative coupling of methane was investigated. The catalysts were characterized by several techniques such as XRD, N
2
adsorption, TEM, XPS, O
2
-TPD and CO
2
-TPD. Compared with Er
2
O
3
and Sr-Er
2
O
3
nanoparticles, Er
2
O
3
and Sr-Er
2
O
3
nanorods exhibit higher CH
4
conversion and C
2
–C
3
selectivity. This is caused by higher (O
−
+ O
2
−
)/O
2−
ratio, a higher number of chemisorbed oxygen species and moderate basic sites achieved on the nanorods catalysts. The Sr-Er
2
O
3
nanorods afford a 23.2% conversion of CH
4
with 50.3% selectivity to C
2
–C
3
at 650 °C.
Graphic Abstract |
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| ISSN: | 1011-372X 1572-879X |
| DOI: | 10.1007/s10562-020-03503-6 |