Catalysis by Molybdena-Alumina and Related Oxide Systems
During the past 30 years, modern surface science and a variety of new spectroscopies have evolved, together with the ability to achieve, easily and routinely ultra-high-vacuum conditions. At first, tungsten surfaces were studied almost exclusively because of the ease with which they could be cleaned, used, and regenerated reproducibly. Today, experiments are carried out on single-crystal planes of many metals of catalytic interest. Similar studies of oxide and sulfide surfaces are just now beginning and they provide the investigator with some new and challenging problems. No longer will the surface be composed of atoms of a single element in various geometric arrangements all having similar chemistry. Instead the surface will contain a variety of configurations of both anions and cations, each having its own chemistry and at times acting cooperatively with each other to activate molecules.
KeywordsSulfided Catalysis Propene Pyridine Acidity
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