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Effects of reduction temperature and content of Pd loading on the performance Pd/CeO2 catalyst for CO oxidation

Authors :
Rongbin Zhang
Huaxi Li
Zhang-Hui Lu
Xuewen Wang
Gang Feng
Yue Yan
Source :
Chinese Chemical Letters. 30:1153-1156
Publication Year :
2019
Publisher :
Elsevier BV, 2019.

Abstract

The content of noble metal loading and the reduction process of the catalysts are important factors influence the economic indicator and catalytic performance for industrial catalysis. In the present work, Pd/CeO2NT (Pd supported on the CeO2 nanotubes) catalysts are prepared with the hydrothermal synthesized CeO2NT and glutathione (GSH) reduced Pd nanoparticles via impregnation. The content of Pd loading as well as the catalysts reduction temperature are optimized to the CO oxidation reduction. Our results show that the best Pd loading is 1.5%Pd/CeO2NT. The catalysts reduced at 350 °C for 2 h prior to catalytic reaction perform the best toward CO oxidation, which reaches completely CO conversion at 70 °C. The XRD, Raman, H2-TPR, TEM, BET and XPS characterization reveal that the excellent catalytic performance of 350 °C 1.5%Pd/CeO2NT sample can be attributed the high Pd0 species and oxygen vacancy in the sample, which are important factors influence the activity of the catalysts.

Details

ISSN :
10018417
Volume :
30
Database :
OpenAIRE
Journal :
Chinese Chemical Letters
Accession number :
edsair.doi...........4310d7d8e15a8173731243082e08301c
Full Text :
https://doi.org/10.1016/j.cclet.2019.03.030