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Abstract:
Various Cu catalysts were prepared by the calcination and reduction of Cu-containing layered double hydroxides (LDHs) including Cu-Al LDHs, Cu-Mg-Al LDHs, Cu-Zn-Al LDHs, and Cu-Zn-Cr LDHs. The catalysts were characterized by using ICP, N2 physisorption, TG, SEM, XRD, H2-TPR, and N2O chemisorption, and tested for the water-gas shift (WGS) reaction at 453-623 K. The characterization results reveal the formation of LDHs on the as-synthesized precursors. Upon calcination and reduction, highly dispersed Cu nanoparticles, particularly for Cu/MgO/Al2O3, were formed. The Cu0 surface area and Cu dispersion was found to be Cu/MgO/Al2O3 > Cu/Al2O3 > Cu/ZnO/Al2O3 > Cu/ZnO/Cr2O3. The activity of the LDHs-derived Cu catalysts for WGS decreased in the order of Cu/MgO/Al2O3 ∼ Cu/ZnO/Al2O3 > Cu/ZnO/Cr2O3 > Cu/Al2O3. The high activity of Cu/MgO/Al2O3 was attributed to its high Cu0 surface area and Cu dispersion, while the interaction between metallic Cu and ZnO on Cu/ZnO/Al2O3 might be responsible for the WGS activity. Interestingly, the highly dispersed Cu metal particles on the Cu/MgO/Al2O3 catalyst seemed stable during the WGS reaction. © 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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International Journal of Hydrogen Energy
ISSN: 0360-3199
Year: 2015
Issue: 32
Volume: 40
Page: 10016-10025
3 . 2 0 5
JCR@2015
8 . 1 0 0
JCR@2023
ESI HC Threshold:183
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
SCOPUS Cited Count: 53
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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