Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 44, Issue 14, Pages 7252-7261Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.01.254
Keywords
Ceria; Copper oxide; Catalyst; Methanol steam reforming
Categories
Funding
- National Natural Science Foundation of China [21376237]
- Nature Science Foundation of Liaoning Province [201601322]
- Science Research General Foundation of Liaoning Education Department [L2015296]
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Nano-rod(R), nano-particle(P) and sponginess(S) of ceria samples were used to study catalytic performance of hydrogen production by methanol steam reforming. The samples were prepared by hydrothermal method, precipitation method, and sol-gel method, respectively, and the CuO was supported on the different morpholopy of CeO2 samples by wet impregnation. SEM, TEM, XRD, XRF, BET, H-2-TPR, XPS and N2O titration methods were used to study correlation between the structure and the catalytic performance for methanol steam reforming. The results showed that the morphology of the prepared CeO2 support dramatically influenced the performance of catalysts. Due to the stronger interaction between copper oxide and ceria support, the CuO/CeO2-R catalyst had exhibited the better catalytic activity than those of the CuO/CeO2-P and CuO/CeO2-S catalysts. Moreover, higher Cu dispersion, lower reduction temperature of CuO, and higher content of active species Cu+ were also advantageous to raising catalytic effects. Besides, with the highest content of surface Ce3+, the CuO/CeO2-R had estimated the content of oxygen vacancy on the surface of the catalyst. The existence of surface oxygen vacancy had a positive effect on the methanol steam reforming. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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