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According to Sabatier principle,12 13 5 6 7 8 9 10 11 4a 1 2 3 4 should be zero,under this condition the overall reaction has the maximum rate.We analyzed the influence on HER activity by metal M(M = Ag、Au、Pd and Pt)adsorbing on the TiO2(001)surface based on the density function theory(DFT)of first principle.