Synthesis of CeO2-Fe2O3 Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation

• Published in: Adsorption science & technology Vol. 2022
• Main Authors: Pham, Chuc Ngoc, Trinh, Quyen Van, Van Thai, Dang, Dao, Nhiem Ngoc, Nguyen, Bac Quang, Doan, Dung Trung, Le, Hung Bao, Nguyen, Vinh Van, Duong, Lim Thi, Tran, Lam Dai
• Format: Journal Article
• Language: English
• Published: Oxford Hindawi 2022; Sage Publications Ltd; SAGE Publications
• Subjects: Carbon dioxide; Carbon monoxide; Catalysts; Cerium oxides; Crystal lattices; Ferric oxide; Honeycomb structures; Low temperature; Mixed oxides; Oxidation; Porous materials; Roasting; Solid solutions; Tartaric acid
• ISSN: 0263-6174; 2048-4038
• DOI: 10.1155/2022/5945169

In this study, the CeO2-Fe2O3 mixed oxide catalysts have been prepared by combustion method using gel-created tartaric acid. The ability of effective carbon monoxide (CO) oxidation to carbon dioxide (CO2) by CeO2-Fe2O3 catalyst under low-temperature conditions was also demonstrated. The calcined CeO2-Fe2O3 material has a porous honeycomb structure and good gaseous absorption-desorption ability. The solid solution of CeO2-Fe2O3 mixed oxides was formed by the substitution of Fe+3 ions at some Ce4+ ion sites within the CeO2 crystal lattice. The results also showed that the calcination temperature and the molar ratio of Ce3+ ions to Fe3+ ions (CF) affected the formation of the structural phase and the catalytic efficiency. The catalytic properties of the CeO2-Fe2O3 mixed oxide were good at the CF ratio of 1 : 1, the average crystal size was near 70 nm, and the specific surface area was about 20.22 m2.g-1. The full conversion of CO into CO2 has been accomplished at a relatively low temperature of 270 °C under insufficient O2 conditions.