کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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42625 | 45934 | 2008 | 7 صفحه PDF | دانلود رایگان |

The need for environmental friendly catalysts for alkane isomerization has prompted research on the WOx/ZrO2 system. Suitable promoters may improve its activity and stability. We investigated the effect of palladium on WOx/ZrO2 redox properties and catalytic activity for n-butane isomerization. Pd favoured the reduction of WxOy clusters already at RT (redox cycles O2/H2) and in reduced samples EPR identified W5+ surface species.Increasing Pd dispersion increased the catalytic activity. Leached and pre-reduced catalysts resulted to have the highest activity, suggesting that the most active species are WxOy clusters anchored to zirconia surface and interacting with near Pd hydride. For n-butane isomerization Pd-promotion is as effective as Pt-promotion.
We investigated the palladium effect on WOx/ZrO2 redox properties and catalytic activity for n-butane isomerization. Pd favoured the reduction of WxOy already at RT and in reduced samples EPR identified three W5+ surface species. Leached and pre-reduced catalysts showed the highest activity, suggesting that the most active species are WxOy clusters anchored to zirconia surface and interacting with near Pd hydride.Figure optionsDownload as PowerPoint slide
Journal: Applied Catalysis A: General - Volume 351, Issue 1, 15 December 2008, Pages 29–35