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Metal and Precursor Effect during 1-Heptyne Selective Hydrogenation Using an Activated Carbon as Support
المؤلفون المشاركون
Coloma-Pascual, Fernando
Lederhos, Cecilia R.
Carrara, Nicolas
Almansa, M. Cristina
Liprandi, Domingo
Quiroga, Mónica E.
Badano, Juan M.
المصدر
العدد
المجلد 2013، العدد 2013 (31 ديسمبر/كانون الأول 2013)، ص ص. 1-9، 9ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2013-11-14
دولة النشر
مصر
عدد الصفحات
9
التخصصات الرئيسية
الطب البشري
تكنولوجيا المعلومات وعلم الحاسوب
الملخص EN
Palladium, platinum, and ruthenium supported on activated carbon were used as catalysts for the selective hydrogenation of 1-heptyne, a terminal alkyne.
All catalysts were characterized by temperature programmed reduction, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy.
TPR and XPS suggest that the metal in all catalysts is reduced after the pretreatment with H2 at 673 K.
The TPR trace of the PdNRX catalyst shows that the support surface groups are greatly modified as a consequence of the use of HNO3 during the catalyst preparation.
During the hydrogenation of 1-heptyne, both palladium catalysts were more active and selective than the platinum and ruthenium catalysts.
The activity order of the catalysts is as follows: PdClRX > PdNRX > PtClRX ≫ RuClRX.
This superior performance of PdClRX was attributed in part to the total occupancy of the d electronic levels of the Pd metal that is supposed to promote the rupture of the H2 bond during the hydrogenation reaction.
The activity differences between PdClRX and PdNRX catalysts could be attributed to a better accessibility of the substrate to the active sites, as a consequence of steric and electronic effects of the superficial support groups.
The order for the selectivity to 1-heptene is as follows: PdClRX = PdNRX > RuClRX > PtClRX, and it can be mainly attributed to thermodynamic effects.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Lederhos, Cecilia R.& Badano, Juan M.& Carrara, Nicolas& Coloma-Pascual, Fernando& Almansa, M. Cristina& Liprandi, Domingo…[et al.]. 2013. Metal and Precursor Effect during 1-Heptyne Selective Hydrogenation Using an Activated Carbon as Support. The Scientific World Journal،Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-1033026
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Lederhos, Cecilia R.…[et al.]. Metal and Precursor Effect during 1-Heptyne Selective Hydrogenation Using an Activated Carbon as Support. The Scientific World Journal No. 2013 (2013), pp.1-9.
https://search.emarefa.net/detail/BIM-1033026
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Lederhos, Cecilia R.& Badano, Juan M.& Carrara, Nicolas& Coloma-Pascual, Fernando& Almansa, M. Cristina& Liprandi, Domingo…[et al.]. Metal and Precursor Effect during 1-Heptyne Selective Hydrogenation Using an Activated Carbon as Support. The Scientific World Journal. 2013. Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-1033026
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1033026
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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