Hydrothermal synthesis and characterization of transition metal (Mn/Fe/Cu) co-doped cerium oxide-based nano-additives for potential use in the reduction of exhaust emission from spark ignition engines. Issue 24 (23rd May 2022)

• Record Type: Journal Article
• Authors: Qadeer, Nazish; Jabeen, Naila; Khan, Latif U.; Sohail, Manzar; Zaheer, Muhammad; Vaqas, Muhammad; Kanwal, Afia; Sajid, Fatima; Qamar, Samina; Akhter, Zareen
• Is Part Of: RSC advances. Volume 12:Issue 24(2022)
• Page Start: 15564
• Page End: 15574
• Publication Date: 2022-05-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2ra01954j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Illustrating the synthesis of doped and undoped CeO2 nanomaterial and its potential application as a promising catalyst for additives to minimize emissions from spark ignition (SI) engines fueled with gasoline blends. Abstract : The goal of this work was to synthesize new cerium oxide-based nano-additives to minimise emissions from spark ignition (SI) engines fueled with gasoline blends, such as carbon monoxide (CO), unburned hydrocarbons (HC) and oxides of nitrogen (NO x ). To investigate the effect of transition metal dopants on their respective catalytic oxidation activity, nano-sized CeO2 catalysts co-doped with Mn, Fe, Cu and Ag ions were successfully produced by a simple hydrothermal technique. The synthesis of nano-catalysts with cubic fluorite geometry was confirmed by XRD data. The addition of transition metal ions to the CeO2 lattice increased the concentration of structural defects like oxygen vacancies and Ce 3+ ions, which are advantageous for the catalytic oxidation reaction, as also supported by XAFS and RAMAN analysis. Further, nano-gasoline fuel emission parameters are measured and compared to straight gasoline fuel. The results demonstrated that harmful exhaust pollutants such as CO, HC and NO x were significantly reduced. The high surface area, better redox characteristics and presence of additional oxygen vacancy sites or Ce 3+ ions have been linked to the improved catalytic performance of the synthesized catalyst.