کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7714682 | 1497441 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Layered double hydroxides as precursors of Cu catalysts for hydrogen production by water-gas shift reaction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Layered double hydroxides as precursors of Cu catalysts for hydrogen production by water-gas shift reaction Layered double hydroxides as precursors of Cu catalysts for hydrogen production by water-gas shift reaction](/preview/png/7714682.png)
چکیده انگلیسی
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 â¼Â 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 32, 24 August 2015, Pages 10016-10025
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 32, 24 August 2015, Pages 10016-10025
نویسندگان
Dalin Li, Yunbing Cai, Yuanyuan Ding, Rule Li, Miaomiao Lu, Lilong Jiang,