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[×ÊÔ´] Surface enrichment

The composition of the surface of most materials is different from that of the bulk and this has
large consequences, not only in catalysis, but in all areas where the surface plays an important
role. The reason for the surface enrichment is that atoms at the surface have a different
surrounding than in the bulk and therefore thermodynamics favours some atoms to be at the
surface and others to be in the bulk. We will study this with the example of alloys, but the
principles are also valid for other materials, like metal oxides and sulfides.  
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http://www.namipan.com/d/b1199e61db4897eee194a6ed556326288e774eb41d920d00

[ Last edited by a410731466 on 2009-2-2 at 20:21 ]
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