Chem. Sci., 2025, Advance Article DOI: 10.1039/D5SC04097C, Edge Article Xuechao Tan, Miguel A. Camblor, Suk Bong Hong A fluoride-deficient synthesis approach to beta zeolites was developed to control the crystallization kinetics, crystal size and framework defect concentration, allowing beta-supported Pd catalysts to have better performance for wet CH4 combustion.