Abstract
This chapter discusses the interaction of sulphur with bimetallic surfaces and illustrates that several new interesting phenomena have been discovered about studying the interaction of sulphur with bimetallic surfaces using the modem techniques of surface science. Very small amounts of sulphur can induce dramatic changes in the morphology of bimetallic surfaces. The electronic perturbations associated with the formation of a heteronuclear metal–metal bond affect the reactivity of the bonded metals toward sulphur. This can be a very important issue to consider when trying to minimize the negative effects of sulphur poisoning or dealing with the design of desulphurization catalysts. There can be bimetallic systems in which alloy formation decreases the affinity for sulphur of both metals. This is a particularly interesting situation, useful for the design of catalysts with a high tolerance toward sulphur poisoning. This chapter presents an overview of all of these different phenomena.
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