Table 3.

Benchmarking of metal oxide‐metal hydroxide, metal chalcogenide‐metal hydroxide, and metal phosphide‐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
Metal oxide‐metal hydroxide heterostructures
PtO2|CoOOH	0.056	14	39	Wang et al.[128]
NiFe2O4|NiFe LDH	2.8	101	67.1	Wu et al.[131]
NiCo2O4|NiCo LDH	N/A	115	56.4	Li et al.[141]
CeOx|NiFe LDH	N/A	154	101	Wang et al.[129]
NiCo2O4|NiFe LDH	4.9	190	59	Wang et al.[130]
Metal chalcogenide‐metal hydroxide heterostructures
MoS2|NiCo LDH	N/A	78	76.6	Sun et al.[137]
CoSe|NiFe LDH	1.5	98	89	Sun et al.[137]
CoNiSe2|CoNi LDH	10	120	74	Yang et al.[134]
MoS2|Co(OH)2	N/A	150	76	Zhu et al.[133]
NiSe|NiFe LDH	2.01	170	70	Dutta et al.[136]
MoS2|Ni(OH)2	N/A	197	73	Zhu et al.[133]
Co0.85Se|NiFe LDH	N/A	260	160	Hou et al.[135]
Metal phosphide‐metal hydroxide heterostructures
NiP|Ni(OH)2	1.26	43	58	Xiong et al.[139]
CoNiP|CoNi LDH	N/A	79	79	Zhou et al.[138]
CoP|Co(OH)x	N/A	100	76	Su et al.[140]

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