کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
53428 46969 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of nano-architectured CeOx supports in RhPd/CeO2 for the catalytic ethanol steam reforming reaction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
The influence of nano-architectured CeOx supports in RhPd/CeO2 for the catalytic ethanol steam reforming reaction
چکیده انگلیسی


• RhPd supported on CeO2 nanocubes performs better in the ethanol steam reforming.
• The CeO2 shaped support has a strong influence on the water–gas shift activity.
• Metal reorganization over CeO2 {1 0 0} and {1 1 0} is higher than over CeO2 {1 1 1}.

The ethanol steam reforming (ESR) reaction has been tested over RhPd supported on polycrystalline ceria in comparison to structured supports composed of nanoshaped CeO2 cubes and CeO2 rods tailored toward the production of hydrogen. At 650–700 K the hydrogen yield follows the trend RhPd/CeO2-cubes > RhPd/CeO2-rods > RhPd/CeO2-polycrystalline, whereas at temperatures higher than 800 K the catalytic performance of all samples is similar and close to the thermodynamic equilibrium. The improved performance of RhPd/CeO2-cubes and RhPd/CeO2-rods for ESR at low temperature is mainly ascribed to higher water–gas shift activity and a strong interaction between the bimetallic–oxide support interaction. STEM analysis shows the existence of RhPd alloyed nanoparticles in all samples, with no apparent relationship between ESR performance and RhPd particle size. X-ray diffraction under operating conditions shows metal reorganization on {1 0 0} and {1 1 0} ceria crystallographic planes during catalyst activation and ESR, but not on {1 1 1} ceria crystallographic planes. The RhPd reconstructing and tuned activation over ceria nanocubes and nanorods is considered the main reason for better catalytic activity with respect to conventional catalysts based on polycrystalline ceria.

Figure optionsDownload high-quality image (70 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 253, 15 September 2015, Pages 99–105
نویسندگان
, , , , , , ,