fig1

Figure 1. (A) The relationships between acidic HER/HOR exchange current densities of different metals and the chemisorption energy of hydrogen (ΔE_H, top), or the adsorption free energy of hydrogen obtained by kinetic simulation (ΔG_H, bottom). Reproduced with permission from^[21]. Copyright 2005, IOP Publishing; (B) Alkaline HER exchange current densities of monometallic surfaces plotted as a function of the calculated HBEs. Reproduced with permission from^[49]. Copyright 2013, Royal Society of Chemistry; (C) Steady-state CVs of Pt; (D) HBEs on Pt(110) and Pt(100) surfaces obtained from (C) as a function of solution pH; (E) Overpotentials of the HOR/HER on Pt(110) and Pt(100) as a function of HBEs. Reproduced with permission from^[50]. Copyright 2015, Springer Nature.