Since 1948, Advances in Catalysis has filled the gap between the papers that report on and the textbooks that teach in the diverse areas of catalysis research. The editors of and contributors to Advances in Catalysis are dedicated to recording progress in this area.Advances in Catalysis, Volume 46 builds foundations of fundamental understanding at the atomic and molecular scales in support of technologically important catalytic processes. The first tow chapters forge links between molecular (homogeneous) catalysis and catalysis occurring analogously-and sometimes more successfully-on surfaces. The following three chapters are concerned with advances in classical surface catlysis building on concepts of reaction kinetics and surface characterization.