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SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA

The present work deals with the synthesis of cobalt bimetallic Co/Mo nanocatalysts supported on alumina. The nanocatalysts were prepared by wet impregnation and co-precipitation method. The samples were characterized in terms of reducibility, dispersion and particle size using Temperature Programmed...

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Main Authors: Ali, Sardar, Mohd Zabidi, N. A., Duvvuri, Subbarao
Format: Conference or Workshop Item
Published: 2009
Subjects:
QD Chemistry
Online Access:http://eprints.utp.edu.my/5750/1/ICONT_2009_Langkawi-_SYNTHESIS_AND_CHARACTERIZATION_OF_COBALT_bimetallic_NANOCATALYSTS_ON_ALUMINA.pdf
http://eprints.utp.edu.my/5750/
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spelling my.utp.eprints.57502017-03-20T02:00:01Z SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA Ali, Sardar Mohd Zabidi, N. A. Duvvuri, Subbarao QD Chemistry The present work deals with the synthesis of cobalt bimetallic Co/Mo nanocatalysts supported on alumina. The nanocatalysts were prepared by wet impregnation and co-precipitation method. The samples were characterized in terms of reducibility, dispersion and particle size using Temperature Programmed Reduction (TPR), X-ray diffraction analysis (XRD), Transmission Electron Microscopy (TEM) and BET-surface area analysis. H2-TPR analysis of Co/Al2O3 indicated three temperature regions at 380◦C (low temperature), 680◦C (medium temperature) and 900 ◦C (high temperature). The incorporation of molybdenum into cobalt nanocatalysts shifted the reduction temperatures towards higher temperature but the percentage of species being reduced at low temperature increased. It was found that incorporation of molybdenum into cobalt nanocatalysts increased the species reducibility due to increase in the particle size as evident by the TEM result. For 5%wt Co the average particle size was 14 nm while for 5%wt Co/Mo nanocatalysts the average particle size was found to be 25 nm. XRD showed that crystallinity of bimetallic nanocatalysts was lower than that of the monometallic nanocatalysts.The precipitation synthesis approach was found to be better method than the impregnation method for the preparation of cobalt bimetallic nanoparticles supported on alumina. 2009-12 Conference or Workshop Item PeerReviewed application/pdf http://eprints.utp.edu.my/5750/1/ICONT_2009_Langkawi-_SYNTHESIS_AND_CHARACTERIZATION_OF_COBALT_bimetallic_NANOCATALYSTS_ON_ALUMINA.pdf Ali, Sardar and Mohd Zabidi, N. A. and Duvvuri, Subbarao (2009) SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA. In: International Conference on Nanotechnology ICONT 2009, 14-17th December, Langkawi. http://eprints.utp.edu.my/5750/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Ali, Sardar
Mohd Zabidi, N. A.
Duvvuri, Subbarao
SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA
description The present work deals with the synthesis of cobalt bimetallic Co/Mo nanocatalysts supported on alumina. The nanocatalysts were prepared by wet impregnation and co-precipitation method. The samples were characterized in terms of reducibility, dispersion and particle size using Temperature Programmed Reduction (TPR), X-ray diffraction analysis (XRD), Transmission Electron Microscopy (TEM) and BET-surface area analysis. H2-TPR analysis of Co/Al2O3 indicated three temperature regions at 380◦C (low temperature), 680◦C (medium temperature) and 900 ◦C (high temperature). The incorporation of molybdenum into cobalt nanocatalysts shifted the reduction temperatures towards higher temperature but the percentage of species being reduced at low temperature increased. It was found that incorporation of molybdenum into cobalt nanocatalysts increased the species reducibility due to increase in the particle size as evident by the TEM result. For 5%wt Co the average particle size was 14 nm while for 5%wt Co/Mo nanocatalysts the average particle size was found to be 25 nm. XRD showed that crystallinity of bimetallic nanocatalysts was lower than that of the monometallic nanocatalysts.The precipitation synthesis approach was found to be better method than the impregnation method for the preparation of cobalt bimetallic nanoparticles supported on alumina.
format Conference or Workshop Item
author Ali, Sardar
Mohd Zabidi, N. A.
Duvvuri, Subbarao
author_facet Ali, Sardar
Mohd Zabidi, N. A.
Duvvuri, Subbarao
author_sort Ali, Sardar
title SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA
title_short SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA
title_full SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA
title_fullStr SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA
title_full_unstemmed SYNTHESIS AND CHARACTERIZATION OF COBALT BIMETALLIC NANOCATALYSTS ON ALUMINA
title_sort synthesis and characterization of cobalt bimetallic nanocatalysts on alumina
publishDate 2009
url http://eprints.utp.edu.my/5750/1/ICONT_2009_Langkawi-_SYNTHESIS_AND_CHARACTERIZATION_OF_COBALT_bimetallic_NANOCATALYSTS_ON_ALUMINA.pdf
http://eprints.utp.edu.my/5750/
_version_ 1738655427491528704
score 13.211869

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