We analyzed the trends in the considered elementary steps using the Brønsted-Evans-Polanyi (BEP) principle, which states that, for a given elementary step within a family of similar reactions, the activation energy linearly correlates with the reaction energy. Strictly speaking, the BEP principle implies that transition states for the examined elementary step should be structurally similar on the considered catalysts. However, this condition is rarely examined during the construction and application of BEP relations (see a rare example in Ref. ).