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<p><strong>Studies on palladium based bimetallic catalysts-Pd-M/TiO<sub>2</sub></strong></p> <p><strong> (M=Cu, Ag & Au): </strong></p> <p><strong>I-Selective hydrogenation of 1-heptyne</strong></p>
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dc |
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| Title Statement |
<p><strong>Studies on palladium based bimetallic catalysts-Pd-M/TiO<sub>2</sub></strong></p> <p><strong> (M=Cu, Ag & Au): </strong></p> <p><strong>I-Selective hydrogenation of 1-heptyne</strong></p> |
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| Added Entry - Uncontrolled Name |
Viswanathan, B ; National Centre for Catalysis Research Dept of Chemistry IIT Madras Chennai-600036 Krishnamurthy, K R ; NCCR IITM Saranya, A ; NCCR, IITM vivakandhan, G ; AVC College, Mayilathurai Thinauvkkarasu, K ; NCCR, IITM DST, Government of India |
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catalysis Hydrogenation of 1-heptyne, bimetallic Pd catalysts, Pd-M- M=Cu, Ag, Au, ensemble and ligand effects, adsorption and activation of 1-heptyne |
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| Summary, etc. |
<p>Two series of palladium based bi-metallic catalysts, Pd<sub>(1-x)</sub>Au<sub>x</sub> (x= 0.1,0.12,0.15 and 0.2 ) and Pd<sub>m</sub>M<sub>n</sub> (M=Cu/Ag/Au- m, n- 0.9, 0.1) supported on TiO<sub>2</sub>-P-25, have been prepared and characterized by X-ray diffraction (XRD), Diffuse Reflectance Spectroscopy (DRS), Transmission Electron Microscopy (TEM), X-ray Photo-electron Spectroscopy (XPS) and Temperature Programmed Reduction (TPR). DRS and XPS studies indicate formation of nano scale alloys involving redistribution of charges within the metals. Selective hydrogenation of 1-heptyne in liquid phase has been studied on these catalysts at atmospheric pressure and in the temperature range 293-313 K. In the Pd<sub>(1-x)</sub>Au<sub>x</sub> series, the catalyst composition Pd<sub>0.9</sub>Au<sub>0.1</sub> displays maximum activity, expressed as TOF. Activity pattern in Pd<sub>0.9</sub>M<sub>0.1</sub> series follows the trend, Pd-Au >Pd-Ag = Pd-Cu >Pd. Selectivity for heptene formation is maintained at > 95% on all catalysts up to 60 min. reaction time. Interplay of ensemble as well as ligand effects, acting simultaneously, influences the adsorption and activation of 1-heptyne, leading to higher activity on Pd-Au bimetallic catalyst vis-à-vis other bimetallic and mono metallic catalysts.</p> <p><strong> </strong></p> |
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| Publication, Distribution, Etc. |
Indian Journal of Chemistry -Section A (IJCA) 2020-10-12 16:00:32 |
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| Electronic Location and Access |
application/pdf http://op.niscair.res.in/index.php/IJCA/article/view/22986 |
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| Data Source Entry |
Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 58, ##issue.no## 2 (2019): INDIAN JOURNAL OF CHEMISTRY- SECTION A |
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| Language Note |
en |
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| Nonspecific Relationship Entry |
http://op.niscair.res.in/index.php/IJCA/article/download/22986/465471956 http://op.niscair.res.in/index.php/IJCA/article/download/22986/465471958 |
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Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India© 2015. The Council of Scientific & Industrial Research, New Delhi. |
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