Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5149451 | Journal of Power Sources | 2017 | 9 Pages |
Abstract
A facile route (urea grind combustion method) is described for the rapid synthesis of Fe-doped Cu-Ce-Zr catalysts within 30Â min through simple grinding and combustion. The effects of iron source and Fe/Cu mass ratio on the performances of the catalysts for CO preferential oxidation (CO-PROX) are evaluated. The influences of H2O, CO2, and their mixture on the activity as well as stability of the catalysts are also investigated. The samples are characterized by XRD, N2 adsorption-desorption, H2-TPR, TEM, Raman and XPS. Fe(NO3)3 is found to be superior to FeCl3 and Fe2(SO4)3 as the iron source for Fe-CuCZ catalyst. Among the different synthesized catalysts, 1/10Fe(N)-CuCZ is found to be the most active catalyst, indicating that the optimal Fe/Cu mass ratio is 1/10. The influences of H2O, CO2, and H2OÂ +Â CO2 on the catalytic performance of 1/10Fe(N)-CuCZ are in the order of CO2Â <Â CO2Â +Â H2OÂ <Â H2O. 1/10Fe(N)-CuCZ exhibits excellent stability during a 228Â h time-on-stream test. 1/10Fe(N)-CuCZ shows the highest catalytic activity and excellent stability even in the presence of H2O and CO2. The excellent catalytic performance can be attributed to the synergy between the highly dispersed copper species and ceria, as well as the formation of more oxygen vacancies and reduced copper species.
Keywords
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Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Jing Wang, Caiyun Han, Xiaoya Gao, Jichang Lu, Gengpin Wan, Dedong He, Ran Chen, Kezhen Chen, Sufang He, Yongming Luo,