General Scope and Definitions

Surface Sites, Adsorption Sites, Active Sites 

The terms surface site, adsorption site, and active site have already been used throughout the Introduction, and in part they may be self-explanatory. It is, however, desirable to use only well-defined terms in the following and, therefore, a brief discussion follows on how these terms are used throughout this paper. 

Depending on the state of hydroxylation, any oxide surface will be made up by incompletely coordinated cations, oxygen ions, and hydroxyl groups (and 

As we deal with oxide surfaces, the existence of protonic (Br nsted) acid sites, of Lewis acidic and Lewis basic sites, and of reducing and oxidizing sites is to be 

The following criteria should be taken into consideration for the selection of suitable poisons. 

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