Table 2.

Benchmarking of metal‐metal hydroxide heterostructures based HER electrocatalysts as per the overpotentials they demanded for driving 10 mA cm⁻² in 1.0 M KOH.

Catalyst	Loading/ mg cm−2	Overpotential/ mV @ 10 mA cm−2	Tafel Slope/ mV dec−1	Reference
Ru|NiCo LDH	0.7	28	42	Li et al.[117]
Pt|Co(OH)2	1	29	35.7	Zhou et al.[124]
Ru|NiFe LDH	N/A	29	31	Chen et al.[116]
Ru|Co‐(CO3)‐OH	N/A	66	65	Li et al.[118]
PtMn|Ni(OH)2	0.212	75	84.9	Wang et al.[111]
Pt|β‐Ni(OH)2	0.0013	92	42	Tang et al.[126]
Cu NWs|NiFe LDH	N/A	116	58.9	Yu et al.[120]
Cu|CoNi‐OH	N/A	150	48	Bai et al.[121]
Pt|Ni(OH)2	N/A	175	N/A	Wang et al.[127]
Cu|CoFe LDH	1.8	190	36.4	Yu et al.[120]
Mn|Co‐(CO)3‐OH	5.6	190	N/A	Tang et al.[126]
PtNi|Ni(OH)2	0.06	190	46.6	Yu et al.[112]
Au|CoNi LDH	N/A	210	92	Sultana et al.[122]

Note: N/A stands for not available and implies that the corresponding data were not provided in the cited reports.