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Physical and Chemical Properties on Reduction Behaviour of Chromium Doped to Molybdenum Oxide in Carbon Monoxide Environment

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dc.contributor.authorNur Syakirah Abdul Rahimen_US
dc.contributor.authorAlinda Samsurien_US
dc.contributor.authorMohd Nor Latifen_US
dc.contributor.authorMaratun Najiha Abu Taharien_US
dc.contributor.authorFairous Sallehen_US
dc.contributor.authorTengku Shafazila Tengku Saharuddinen_US
dc.contributor.authorNorliza Dzakariaen_US
dc.contributor.authorMuhammad Rahimi Yusopen_US
dc.date.accessioned2024-05-29T02:27:06Z
dc.date.available2024-05-29T02:27:06Z
dc.date.issued2023
dc.date.submitted2023-8-16
dc.descriptionVol 27 No 2en_US
dc.description.abstractThis study aimed to investigate the influence of added chromium on the physical and chemical reduction behavior of molybdenum trioxide (MoO3) in a carbon monoxide (CO) environment. The reduction behavior of the sample was evaluated by using temperature-programmed reduction (TPR), and the phases produced by the reduced samples were analyzed using X-ray diffraction spectroscopy (XRD) and field emission scanning electron microscopy (FESEM). The TPR study was conducted using two reduction modes: non-isothermal reduction at 700°C with 20 vol. % of CO in nitrogen (N2), followed by isothermal reduction at 700°C for an additional 60 min. The TPR profile showed that the reduction of doped and undoped MoO3 was preceded by two reduction stages (MoO3 → Mo4O11 → MoO2), wherein, the reduction of doped MoO3 starting at a lower temperature (380°C500°C) than that of undoped MoO3 (550°C). Additionally, based on XRD analysis, it was shown that the conversion of MoO3 to MoO2 under CO generated an intermediate product known as Mo4O11. It is discovered that, increasing the concentration of chromium doped to MoO3 enhanced the reducibility of oxide due to the rapid production of MoO2 phases at T: 380ºC. Further heating under CO atmosphere, carbide species built up in the form of Mo2C rather than metallic Mo which might be due to excess of CO exposure to the surface layer of oxide.en_US
dc.identifier.epage260
dc.identifier.issn1394-2506
dc.identifier.issue2
dc.identifier.spage251
dc.identifier.urihttps://mjas.analis.com.my/mjas/v27_n2/pdf/Rahim_27_2_3.pdf
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85159136440&origin=resultslist&sort=plf-f&src=s&sid=46bdc3c78693bbba9a3b61c04547005c&sot=b&sdt=b&s=TITLE-ABS-KEY%28PHYSICAL+AND+CHEMICAL+PROPERTIES+ON+REDUCTION+BEHAVIOUR+OF+CHROMIUM+DOPED+TO+MOLYBDENUM+OXIDE+IN+CARBON+MONOXIDE+ENVIRONMENT%29&sl=157&sessionSearchId=46bdc3c78693bbba9a3b61c04547005c
dc.identifier.urihttps://oarep.usim.edu.my/handle/123456789/10664
dc.identifier.volume27
dc.language.isoen_USen_US
dc.publisherMalaysian Analytical Sciences Society (ANALIS)en_US
dc.relation.ispartofMalaysian Journal of Analytical Sciences (MJAS)en_US
dc.subjectreduction, molybdenum oxide, carbon monoxide, chromiumen_US
dc.titlePhysical and Chemical Properties on Reduction Behaviour of Chromium Doped to Molybdenum Oxide in Carbon Monoxide Environmenten_US
dc.title.alternativeSifat Fizikal dan Kimia terhadap Tindak Balas Penurunan Kromium yang Didopkan kepada Molibdenum Oksida di dalam Persekitaran Karbon Monoksidaen_US
dc.typeArticleen_US
dspace.entity.typePublication

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