Table 2.

Summary of alkaline HER performance for various Ni-based electrocatalysts.

Catalysts	Current density (mA·cm−2)	Overpotential (mV)	Tafel slope (mV·dec−1)	Reference
NiO/C	10	565	77.8	[40]
Ni/NiO	10	120	114	[41]
N-NiO	10	154	90	[42]
Ni3S2@2DCo-MOF	10	140	90.3	[43]
Ni3S2/NC	10	199	72	[44]
NiP2/NiO	10	≈131	94	[45]
Ni5P4	10	49	98	[46]
NiCoP/rGO	10	209	124.1	[47]
NF-Ni3Se2/Ni	10	203	79	[48]
NiO/SnO2	10	157	155	[50]
NiO@TiO2	10	144	152.34	[51]
Ni/NiO/SS-10	10	184	90.5	this work