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HER performance of different surfaces
(A) Gibbs free energy of (100), (010), (111), (210), and (310) surfaces for Na2CdSn and metal Pt.
(B) Surface DOS values of (100), (010), (111), (210), and (310) surfaces for Na2CdSn.
(C) Linear relationship between surface DOS values and Gibbs free energy of (100), (010), (111), (210), and (310) surfaces.
(D) Volcano map of Na2CdSn, pure metals (Pt, Pb, Ag, and Cu) and some other topological materials (TaAs family, PtGa, and CoS2).
