کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5425077 | 1395847 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Adsorption and reaction of propanal, 2-propenol and 1-propanol on Ni/Pt(111) bimetallic surfaces Adsorption and reaction of propanal, 2-propenol and 1-propanol on Ni/Pt(111) bimetallic surfaces](/preview/png/5425077.png)
The hydrogenation of acrolein (CH2CHCHO) can lead to the formation of three hydrogenation products, 2-propenol (CH2CHCH2OH), propanal (CH3CH2CHO), and 1-propanol (CH3CH2CH2OH). In the current study the adsorption and reaction of these three molecules were investigated on Ni/Pt(111) surfaces to understand the different hydrogenation pathways of acrolein, using temperature programmed desorption (TPD) and high resolution electron energy loss spectroscopy (HREELS). TPD experiments showed that 2-propenol underwent isomerization toward propanal on Pt(111) and the PtNiPt(111) bimetallic surface, with a dominant decarbonylation pathway on the Pt(111) surface. A self-hydrogenation (disproportionation) pathway toward 1-propanol was observed on the Ni(111) film, however, the decarbonylation pathway was found to be the most dominant on this surface. Unlike 2-propenol, propanal did not undergo isomerization or self-hydrogenation pathways on any of the surfaces, with the dominant pathway being primarily the decarbonylation on Pt(111) and Ni(111). In contrast, 1-propanol underwent mainly molecular desorption from all three surfaces. These results provided additional understanding of previous studies of hydrogenation pathways of acrolein on the Ni/Pt(111) surfaces.
Journal: Surface Science - Volume 602, Issue 14, 15 July 2008, Pages 2412-2420