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The alloy Au−Pd surfaces were modeled by a four-layer slabwith a vacuum region of 15 Å to avoid image interaction. Weemployed (3 ¡Á 3) supercells for all the (111) surfaces and (4 ¡Á4) supercells for all the (100) surfaces. For both (111) and(100) surfaces, we used a (3 ¡Á 3 ¡Á 1) Monkhorst−Pack67 mesh of k-point to do geometric optimizations and transition states searching and increased the k-point up to (11 ¡Á 11 ¡Á 1) to reevaluate electronic structures.

ÎÄÏ×J. Phys. Chem. C 2015, 119, 16072−16081
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