"In the presence of a catalyst, both the forward and reverse reaction rates will speed up EQUALLY... [...] If the addition of catalysts could possibly alter the equilibrium state of the reaction, this would violate the second rule of thermodynamics..."
https://www.boundless.com/chemistry/...lyst-447-3459/
Here is a catalyst that accelerates the forward reaction, 2H+ - H_2, but SUPPRESSES the reverse reaction, H_2 - 2H+. Violation of the second law of thermodynamics par excellence:
http://images.nature.com/m685/nature...mms3500-f1.jpg
Yu Hang Li et al. Unidirectional suppression of hydrogen oxidation on oxidized platinum clusters
https://www.nature.com/articles/ncomms3500
Pentcho Valev