Fig. 6: Active sites for HER.

The optimal adsorption sites for H on the surface of (a) pure Cu55, (b) Cu49Ni6, (c) Cu34Ni21, (d) Cu34Co21, (e) Cu34Ru21, and (f) Cu34Rh21 clusters with |ΔGH| < 0.1 eV.
The optimal adsorption sites for H on the surface of (a) pure Cu55, (b) Cu49Ni6, (c) Cu34Ni21, (d) Cu34Co21, (e) Cu34Ru21, and (f) Cu34Rh21 clusters with |ΔGH| < 0.1 eV.