Facile Synthesis of Au/CeO2 Catalyst for Low Temperature CO Oxidation
Nanosized ceria (CeO2) with high surface area was developed by a single pot combustion synthesis and highly dispersed nanosized gold (∼0.5 wt.% and around 10 nm) on CeO2 was achieved by deposition precipitation (DP) method. X-ray diffraction confirmed the formation
of CeO2, whereas transmission electron microscope ensured the presence of nanosized CeO2 and gold particles. Physico-chemical studies by UV-Vis, Raman and X-ray photoelectron spectroscopy indicated the coexistence of gold and cerium in mixed oxidation states, whereas
temperature programmed reduction confirmed the high amount of surface oxygen groups on Au/CeO2-DP (DP of Au on CeO2 where CeO2 prepared by Mixed fuel such as citric acid + Urea) and Au/CeO2-CB (Entire Au/CeO2 catalyst prepared by citric
acid combustion) catalysts. Typical results during CO oxidation indicated the high rate (35 mole CO g–1 Au h–1 and 18 mole CO g–1 Au h–1 at 313 K) and low activation energy (E
a) (15 kJ mol–1
and 17 kJ mol–1) with Au/CeO2 (DP) and Au/CeO2 (CB) catalysts respectively.
Keywords: CITRIC ACID; COMBUSTION SYNTHESIS; DEPOSITION PRECIPITATION; LOW TEMPERATURE CO OXIDATION; UREA
Document Type: Research Article
Publication date: 01 September 2013
- Advanced Chemistry Letters is an international multidisciplinary peer-reviewed journal covering all fundamental and applied research areas of chemical sciences including organic chemistry, inorganic chemistry, synthetic chemistry, medicinal chemistry, analytical chemistry, organometallic chemistry, nuclear chemistry, electrochemistry, atmospheric chemistry, environmental chemistry, materials chemistry, materials science, supramolecular chemistry, physical chemistry, polymer chemistry, bioinorganic chemistry, physical organic chemistry, surface chemistry, biochemistry, molecular biology, chemical biology, food chemistry, natural product chemistry, neurochemistry, pharmacology, photochemistry, photobiology, toxicology, nanoscience, nanotechnology, agrochemistry, green chemistry, marine chemistry, geochemistry, petrochemistry, radiochemistry, astrochemistry, molecular physics, chemical engineering, quantum chemistry, and theoretical and computational chemistry.
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