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The Role of Brønsted and Lewis Acid Sites of Vanadyl Pyrophosphate Measured by Dimethylpyridine-temperature Programmed Desorption in the Selective Oxidation of Butane
Vanadyl pyrophosphate catalyst Acidic property Dimethylpyridine Temperature programmed desorption
2009/7/24
Acidic properties of three types of (VO)2P2O7 catalysts were investigated by temperature programmed desorption (TPD) using 3, 5- and 2, 6-dimethylpyridine as probes, and the selective oxidation of but...
Hydrophobic Nature of Organo-Clays as a Lewis Acid/Base Phenomenon
Organo-clay Surface tension Lewis acid/base
2011/12/31
The surface thermodynamic properties of a series of n-alkylammonium and quaternary ammonium treated clay films were determined by contact angle measurement of drops of test liquids using the Young equ...