Fig. 2
Catalytic performance for overall water splitting. a CVs of GC electrode modified with as-prepared Au25, Au24Cu1 and Au24Cd1 clusters in 0.5 M H2SO4. Scanning rate: 0.010 V s−1. b Linear sweep HER voltammograms for Au25, Au24Cu1 and Au24Cd1 clusters. Scanning rate: 0.001 V s−1. c Current density of different clusters at the potential of −0.4585 V toward the activity of HER. d CVs of GC electrode modified with as-prepared Au25, Au24Cu1 and Au24Cd1 clusters in 1 M KOH. Scanning rate: 0.10 V s−1. e Linear sweep OER voltammograms for Au25, Au24Cu1 and Au24Cd1 clusters. Scanning rate: 0.005 V s−1. f Current density of different clusters at the potential of 1.3244 V toward the activity of OER