Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites

Abstract Ce-doped LaMnO3 perovskite ceramics (La1−xCexMnO3) were synthesized by sol-gel based co-precipitation method and tested for the oxidation of benzyl alcohol using molecular oxygen. Benzyl alcohol conversion of ca. 25–42% was achieved with benzaldehyde as the main product. X-ray diffraction (...

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Autores principales:	Anees A. Ansari, Naushad Ahmad, Manawwer Alam, Syed F. Adil, Shahid M. Ramay, Abdulrahman Albadri, Ashfaq Ahmad, Abdullah M. Al-Enizi, Basel F. Alrayes, Mohamed E. Assal, Abdulrahman A. Alwarthan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/156b23c45de74311b45aae5325d24c63
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spelling	oai:doaj.org-article:156b23c45de74311b45aae5325d24c632021-12-02T15:09:38ZPhysico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites10.1038/s41598-019-44118-12045-2322https://doaj.org/article/156b23c45de74311b45aae5325d24c632019-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-44118-1https://doaj.org/toc/2045-2322Abstract Ce-doped LaMnO3 perovskite ceramics (La1−xCexMnO3) were synthesized by sol-gel based co-precipitation method and tested for the oxidation of benzyl alcohol using molecular oxygen. Benzyl alcohol conversion of ca. 25–42% was achieved with benzaldehyde as the main product. X-ray diffraction (XRD), thermogravimetric analysis (TGA), BET surface area, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (H2-TPR), temperature-programmed oxidation (O2-TPO), FT-IR and UV-vis spectroscopic techniques were used to examine the physiochemical properties. XRD analysis demonstrates the single phase crystalline high purity of the perovskite. The Ce-doped LaMnO3 perovskite demonstrated reducibility at low-temperature and higher mobility of surface O2-ion than their respective un-doped perovskite. The substitution of Ce3+ ion into the perovskite matrix improve the surface redox properties, which strongly influenced the catalytic activity of the material. The LaMnO3 perovskite exhibited considerable activity to benzyl alcohol oxidation but suffered a slow deactivation with time-on-stream. Nevertheless, the insertion of the A site metal cation with a trivalent Ce3+ metal cation led to an enhanced in catalytic performance because of atomic-scale interactions between the A and B active site. La0.95Ce0.05MnO3 catalyst demonstrated the excellent catalytic activity with a selectivity of 99% at 120 °C.Anees A. AnsariNaushad AhmadManawwer AlamSyed F. AdilShahid M. RamayAbdulrahman AlbadriAshfaq AhmadAbdullah M. Al-EniziBasel F. AlrayesMohamed E. AssalAbdulrahman A. AlwarthanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Anees A. Ansari Naushad Ahmad Manawwer Alam Syed F. Adil Shahid M. Ramay Abdulrahman Albadri Ashfaq Ahmad Abdullah M. Al-Enizi Basel F. Alrayes Mohamed E. Assal Abdulrahman A. Alwarthan Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites
description	Abstract Ce-doped LaMnO3 perovskite ceramics (La1−xCexMnO3) were synthesized by sol-gel based co-precipitation method and tested for the oxidation of benzyl alcohol using molecular oxygen. Benzyl alcohol conversion of ca. 25–42% was achieved with benzaldehyde as the main product. X-ray diffraction (XRD), thermogravimetric analysis (TGA), BET surface area, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (H2-TPR), temperature-programmed oxidation (O2-TPO), FT-IR and UV-vis spectroscopic techniques were used to examine the physiochemical properties. XRD analysis demonstrates the single phase crystalline high purity of the perovskite. The Ce-doped LaMnO3 perovskite demonstrated reducibility at low-temperature and higher mobility of surface O2-ion than their respective un-doped perovskite. The substitution of Ce3+ ion into the perovskite matrix improve the surface redox properties, which strongly influenced the catalytic activity of the material. The LaMnO3 perovskite exhibited considerable activity to benzyl alcohol oxidation but suffered a slow deactivation with time-on-stream. Nevertheless, the insertion of the A site metal cation with a trivalent Ce3+ metal cation led to an enhanced in catalytic performance because of atomic-scale interactions between the A and B active site. La0.95Ce0.05MnO3 catalyst demonstrated the excellent catalytic activity with a selectivity of 99% at 120 °C.
format	article
author	Anees A. Ansari Naushad Ahmad Manawwer Alam Syed F. Adil Shahid M. Ramay Abdulrahman Albadri Ashfaq Ahmad Abdullah M. Al-Enizi Basel F. Alrayes Mohamed E. Assal Abdulrahman A. Alwarthan
author_facet	Anees A. Ansari Naushad Ahmad Manawwer Alam Syed F. Adil Shahid M. Ramay Abdulrahman Albadri Ashfaq Ahmad Abdullah M. Al-Enizi Basel F. Alrayes Mohamed E. Assal Abdulrahman A. Alwarthan
author_sort	Anees A. Ansari
title	Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites
title_short	Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites
title_full	Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites
title_fullStr	Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites
title_full_unstemmed	Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites
title_sort	physico-chemical properties and catalytic activity of the sol-gel prepared ce-ion doped lamno3 perovskites
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/156b23c45de74311b45aae5325d24c63
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Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites

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