کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
60835 | 47548 | 2015 | 11 صفحه PDF | دانلود رایگان |

• CeO2 nanofibers were obtained by electrospinning to be used as catalytic supports.
• Fiber-shaped Au/CeO2 solids have maximum reactant access at very low pressure drop.
• Fiber-supported Au nanoparticles synthesized in situ are active and stable.
Au/CeO2 catalysts shaped as nanofibers were obtained by supporting Au nanoparticles (ca. 3 nm) on CeO2 nanofibers of around 200 nm diameter. The CeO2 support was prepared by calcining electrospun polymer nanocomposite fibers with a high Ce content; then gold nanoparticles were either synthesized in situ or deposited from a suspension. The prepared catalysts were used in the preferential oxidation of CO in a hydrogen-rich stream. The catalysts prepared by deposition of preformed gold nanoparticles were less stable and underwent sintering due to a weaker nanoparticle–support interaction. In contrast, the catalysts with Au nanoparticles synthesized in situ were active (90% conversion and 46% selectivity) and stable. The fiber-shaped catalyst was able to give maximum reactant access at a much lower pressure drop than catalyst in powder form.
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Journal: Journal of Catalysis - Volume 329, September 2015, Pages 479–489