Regulations concerning automotive emissions are becoming more stringent in recent times and consequently more research efforts have directed toward lowering the environmental impact of pollutants emitted by vehicles and industries. In this context, the research focus has been aimed at the development of more efficient and highly resistant catalytic materials which could be able to maintain maximum durability while decreasing pollutant emissions to minimum levels. Three-way catalysts (TWCs) constitute the most satisfactory and efficient solution to reduce pollutant emissions from gasoline-engine-powered vehicles. This book which is based on a comprehensive research study gives an insight on the development of novel nanosized cerium oxide based catalysts for TWC and other catalytic applications. It contributes invaluable information on how catalysts composition can be manipulated for better performance. This book will be especially useful to researchers working in the field of catalysts development, catalyst''s structural analysis, environmental catalysis, and more specifically in the area nanocatalysis.