Chapter two: Relationship between surface structures of catalytic materials and their catalytic properties (4 credit hours) By Dr. Yejun Qiu Department of Materials Science and Engineering Spring, 2011. ? Electron structure ? Crystal structure ? Defect structure ? Surface acid or base sites (important acid-base catalysis) ? Skeleton structure (Example: zeolite) ? Size effect (Nano effect) for 1. Electron structure ? Atomic Orbital Theory (原子轨道理论); ? Molecular Orbital Theory (分子轨道理论 ); ? Band the