Partial oxidation of methane to synthesis gas over Pt nanoparticles supported on nanocrystalline CeO2 catalyst. Issue 12 (26th February 2016)

• Record Type: Journal Article
• Authors: Singha, Rajib Kumar; Ghosh, Shilpi; Acharyya, Shankha Subhra; Yadav, Aditya; Shukla, Astha; Sasaki, Takehiko; Venezia, Anna Maria; Pendem, Chandrashekar; Bal, Rajaram
• Is Part Of: Catalysis science & technology. Volume 6:Issue 12(2016)
• Page Start: 4601
• Page End: 4615
• Publication Date: 2016-02-26
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/c5cy02088c
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : Pt-nanoparticles supported on CeO2 have been prepared by a post synthesis method (Pt–CeO2 PS ). Abstract : Pt-nanoparticles supported on CeO2 have been prepared by a post synthesis method (Pt–CeO2 PS ). In the post synthesis method, CeO2 nanoparticles were prepared by a hydrothermal method, followed by the deposition of Pt nanoparticles over the CeO2 . The prepared catalyst was characterized by XRD, BET-surface area, TPR, SEM, TEM, XPS and XAFS. It was observed that the catalyst prepared by the post synthesis method contained Pt nanoparticles with sizes between 2–5 nm supported on CeO2 nanoparticles with sizes between 20–60 nm. The catalytic performance of the Pt–CeO2 PS catalyst was evaluated in the partial oxidation of methane for synthesis gas production. The Pt–CeO2 PS catalyst could activate methane at 350 °C. We believe that the nanosized Pt particles and the synergy between the Pt particles, the CeO2 nanoparticles and the presence of a strong metal–support interaction play key roles in the activation of methane at such a low temperature. Different reaction parameters, like Pt-loading, reaction temperature, space velocity, and time on stream, were studied in detail. The Pt–CeO2 PS catalyst does not deactivate till 100 h with a constant H2 /CO mole ratio of 1.9 at 800 °C.