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Yttrium oxide modified Cu / ZnO / Al 2 O 3 catalysts via hydrotalcite-like precursors for the CO 2 hydrogenation reaction to methanol
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gao, Peng Zhong, Liangshu Zhang, Lina Wang, Honggeng Sun, Yuhan |
| Copyright Year | 2014 |
| Abstract | Y2O3-modified Cu/ZnO/Al2O3 catalysts (Cu :Zn:(Al+Y) = 2:1:1) via hydrotalcite-like precursors were synthesized with Y:(Al+Y) atomic ratios between 0 and 0.5. With the introduction of certain amount of Y2O3, the surface area and dispersion of Cu for Cu/ZnO/Al2O3 catalysts increased significantly. However, excess Y2O3 content would decrease the dispersions of both Cu and ZnO as a result of the declined amount of hydrotalcite-like phases in the precursor. It was suggested that Y2O3 and the hydrotalcite-like structure could prevent the aggregation of Cu nanoparticles during reduction and reaction process and improve the reducibility of Cu species. As Cu species were predominant active sites for the methanol synthesis from CO2 hydrogenation, addition of suitable amount of Y2O3 to Cu/ZnO/Al2O3 catalyst enhanced the catalysis for CO2 hydrogenation remarkably. Nevertheless, the CO2 conversion decreased significantly when Y :(Al+Y) > 0.1 due to the lower Cu surface area and a relatively weaker interaction between Cu and ZnO. The Cu/ZnO/Al2O3/Y2O3 catalyst with Y :(Al+Y) = 0.1 derived from hydrotalcite-like compounds afforded the best catalytic performance with high stability. Page 1 of 41 Catalysis Science & Technology C at al ys is S ci en ce & Te ch no lo gy A cc ep te d M an us cr ip t |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/getauthorversionpdf/C5CY00372E |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c5/cy/c5cy00372e/c5cy00372e1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
