Assuming that all of the most complex sites are ideal, it is possible to calculate the maximum activity increase due to them. Here, a decreasing trend is observed: a 2-element site can increase the activity of Pt by a factor of 40, whereas a 5-element site can only increase the activity by a factor of 3.5 ( Figure ).
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Unraveling the Mixing Entropy-Activity Relationship in High Entropy Alloy Catalysts: The More, The Better?
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