“…has been an important focal area of research and development of active, robust, and low cost catalysts for achieving the ultimate commercialization of fuel cells. [2][3][4][5][6] The enhanced electrocatalytic activity in such catalysts has been attributed to serious factors, such as lattice, 7,8 electronic 6 and Pd-skin effects [9][10][11][12] and so on. Furthermore, some of these factors can be controlled in different ways.…”