Staff View: Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR

Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR

Nickel (Ni), cobalt (Co), and zinc (Zn) loaded on fibrous silica KCC-1 was investigated for CO2 methanation reactions. Ni/KCC-1 exhibits the highest catalyst performance with a CH4 formation rate of 33.02 × 10-2 molCH4 molmetal -1 s-1, 1.77 times higher than that of Co/KCC-1 followed by Zn/KCC-1 and...

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Main Authors:	Shahul Hamid, Muhamed Yusuf, Triwahyono, Sugeng, Abdul Jalil, Aishah, Che Jusoh, Nurfatehah Wahyuny, Izan, Siti Maryam, Tuan Abdullah, Tuan Amran
Format:	Article
Published:	American Chemical Society 2018
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/84332/ http://dx.doi.org/10.1021/acs.inorgchem.8b00241
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spelling	my.utm.843322019-12-28T01:46:52Z http://eprints.utm.my/id/eprint/84332/ Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR Shahul Hamid, Muhamed Yusuf Triwahyono, Sugeng Abdul Jalil, Aishah Che Jusoh, Nurfatehah Wahyuny Izan, Siti Maryam Tuan Abdullah, Tuan Amran TP Chemical technology Nickel (Ni), cobalt (Co), and zinc (Zn) loaded on fibrous silica KCC-1 was investigated for CO2 methanation reactions. Ni/KCC-1 exhibits the highest catalyst performance with a CH4 formation rate of 33.02 × 10-2 molCH4 molmetal -1 s-1, 1.77 times higher than that of Co/KCC-1 followed by Zn/KCC-1 and finally the parent KCC-1. A pyrrole adsorption FTIR study reveals shifting of perturbed N-H stretching decreasing slightly with the addition of metal oxide, suggesting that the basic sites of catalyst were inaccessible due to metal oxide deposition. The strengths of basicity were found to follow sthe equence KCC-1, Ni/KCC-1, Zn/KCC-1, and Co/KCC-1. The data were supported by N2 adsorption desorption analysis, where Co/KCC-1 displayed the greatest reduction in total surface area whereas Ni/KCC-1 displayed the least reduction. The elucidation of difference mechanism pathways has also been studied by in situ IR spectroscopy studies to determine the role of different metal oxides in CO2 methanation. It was discovered that Ni/KCC-1 and Co/KCC-1 follow a dissociative mechanism of CO2 methanation in which the CO2 molecule was dissociated on the surface of the metal oxide before migration onto the catalyst surface. This was confirmed by the evolution of a peak corresponding to carbonyl species (COads) on a metal oxide surface in FTIR spectra. Zn/KCC-1, on the other hand, showed no such peak, indicating associative methanation pathways where a hydrogen molecule interacts with an O atom in CO2 to form COads and OH. These results offers a better understanding for catalytic studies, particularly in the field of CO2 recycling. American Chemical Society 2018-05 Article PeerReviewed Shahul Hamid, Muhamed Yusuf and Triwahyono, Sugeng and Abdul Jalil, Aishah and Che Jusoh, Nurfatehah Wahyuny and Izan, Siti Maryam and Tuan Abdullah, Tuan Amran (2018) Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR. Inorganic Chemistry, 57 (10). pp. 5859-5869. ISSN 0020-1669 http://dx.doi.org/10.1021/acs.inorgchem.8b00241
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TP Chemical technology
spellingShingle	TP Chemical technology Shahul Hamid, Muhamed Yusuf Triwahyono, Sugeng Abdul Jalil, Aishah Che Jusoh, Nurfatehah Wahyuny Izan, Siti Maryam Tuan Abdullah, Tuan Amran Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR
description	Nickel (Ni), cobalt (Co), and zinc (Zn) loaded on fibrous silica KCC-1 was investigated for CO2 methanation reactions. Ni/KCC-1 exhibits the highest catalyst performance with a CH4 formation rate of 33.02 × 10-2 molCH4 molmetal -1 s-1, 1.77 times higher than that of Co/KCC-1 followed by Zn/KCC-1 and finally the parent KCC-1. A pyrrole adsorption FTIR study reveals shifting of perturbed N-H stretching decreasing slightly with the addition of metal oxide, suggesting that the basic sites of catalyst were inaccessible due to metal oxide deposition. The strengths of basicity were found to follow sthe equence KCC-1, Ni/KCC-1, Zn/KCC-1, and Co/KCC-1. The data were supported by N2 adsorption desorption analysis, where Co/KCC-1 displayed the greatest reduction in total surface area whereas Ni/KCC-1 displayed the least reduction. The elucidation of difference mechanism pathways has also been studied by in situ IR spectroscopy studies to determine the role of different metal oxides in CO2 methanation. It was discovered that Ni/KCC-1 and Co/KCC-1 follow a dissociative mechanism of CO2 methanation in which the CO2 molecule was dissociated on the surface of the metal oxide before migration onto the catalyst surface. This was confirmed by the evolution of a peak corresponding to carbonyl species (COads) on a metal oxide surface in FTIR spectra. Zn/KCC-1, on the other hand, showed no such peak, indicating associative methanation pathways where a hydrogen molecule interacts with an O atom in CO2 to form COads and OH. These results offers a better understanding for catalytic studies, particularly in the field of CO2 recycling.
format	Article
author	Shahul Hamid, Muhamed Yusuf Triwahyono, Sugeng Abdul Jalil, Aishah Che Jusoh, Nurfatehah Wahyuny Izan, Siti Maryam Tuan Abdullah, Tuan Amran
author_facet	Shahul Hamid, Muhamed Yusuf Triwahyono, Sugeng Abdul Jalil, Aishah Che Jusoh, Nurfatehah Wahyuny Izan, Siti Maryam Tuan Abdullah, Tuan Amran
author_sort	Shahul Hamid, Muhamed Yusuf
title	Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR
title_short	Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR
title_full	Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR
title_fullStr	Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR
title_full_unstemmed	Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR
title_sort	tailoring the properties of metal oxide loaded/kcc-1 toward a different mechanism of co2 methanation by in situ ir and esr
publisher	American Chemical Society
publishDate	2018
url	http://eprints.utm.my/id/eprint/84332/ http://dx.doi.org/10.1021/acs.inorgchem.8b00241
_version_	1654960072648818688
score	13.211869

Tailoring the Properties of Metal Oxide Loaded/KCC-1 toward a Different Mechanism of CO2 Methanation by in Situ IR and ESR

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