Synthesis of CeO2 and Zr-Doped CeO2 (Ce1−xZrxO2) Catalyst by Green Synthesis for Soot Oxidation Activity

The CeO2 and Zr-doped CeO2 (Ce1−xZrxO2) catalysts are synthesized by the green synthesis process and tested for soot oxidation activity. The identification of phase, morphology, and soot oxidation is analyzed by XRD (X-ray diffraction), FE-SEM (field emission scanning electron microscopy), and TGA–DSC (thermogravimetric–differential scanning calorimetry), respectively. The proper replacement of Ce with Zr has been identified in XRD. The catalyst showed higher stability at elevated temperatures for soot oxidation after the introduction of Zr into CeO2. It is observed that Zr-doped CeO2 samples show low-temperature soot oxidation reactivity than pure CeO2. Soot oxidation is found between the temperature range of 427–455 °C. The Zr-doped CeO2 catalyst showed higher stability and reactivity than pure CeO2.