Abstract
Abstract Monoclinic molybdenum trioxide, β-MoO 3 , was synthesized as an active catalyst for vapor-phase oxidation of methanol by a soft chemical transformation of α-MoO 3 . The addition of HNO 3 to an aqueous solution of α-MoO 3 , followed by drying and calcination, resulted in the formation of yellow powders consisting of β-MoO 3 . The β-MoO 3 content increased with the amount of HNO 3 , but the addition of excess HNO 3 inhibited β-MoO 3 formation. The maximum yield was obtained at a HNO 3 /Mo molar ratio of 0.37. Thermal analyses indicated that HNO 3 controlled dehydration of the dried precursor to induce β-phase formation. The resulting β-MoO 3 had a higher activity than α-MoO 3 in the partial oxidation of methanol to formaldehyde at temperatures below 600 K.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
