Catalysts 165 Catalyst activity 90 catalyst 73 article 62 Oxidation 52 Catalysis 45 Nickel 42 catalysis 42 Hydrogen 40 unclassified drug 35 Copper 34 Hydrogen production 34 Ethanol 33 Enzymes 30 Catalyst supports 28 Chemical reactors 28 Fuel cells 28 Steam reforming 28 Kinetics 26 Reaction kinetics 26 X ray diffraction 26 chemical reaction 26 Carbon 24 Carbon dioxide 24 Mesoporous materials 24 Platinum 24 priority journal 23 Electrodes 22 synthesis 22 Alumina 20