Table 1. Comparison of the efficiency of HER based on Pt and Au electrodes in H₂SO₄ electrolytes.

Electrode	Current density (j, mA cm−2)	Overpotential at the corresponding j	[H2SO4]	ref.
Pt/Cc	10.7	−0.3 V	0.50 M	31
Pt (Au NT water)	22.8	−0.3 V	0.50 M	This work
	80.7	−0.4 V
Pt (Au NT water-LED)	27.2	−0.3 V	0.50 M	This work
	100.2	−0.4 V
Pt/Nanoporous Au	45	−0.4 V	0.50 M	32
Pt/4-sulfophenyl/GC	1.77	−0.4 V	0.50 M	33
PW12O403-/PtNP/ITO	5.3	−0.4 V	0.50 M	34
Pd60Pt40b	64	−0.4 V	0.50 M	35
Ppy0.2(Pt)/Ptc	1.4	−0.3 V	0.05 M	36
Pt (Au NT water)	3.2	−0.3 V	0.05 M	This work
Pt (Au NT water-LED)	3.7	−0.3 V	0.05 M	This work
Au	43	−0.8 V	0.50 M	32
Nanoporous Au	62	−0.8 V	0.50 M	32
ORC-Au in situ (LED)	79.3	−0.8 V	0.50 M	This work

^aReference electrode of RHE transfers into Ag/AgCl; E_{vs RHE} = E_{vs Ag/AgCl}+ E⁰_Ag/AgCl+ 0.059 pH (at 298 K).

^bReference electrode of NHE transfers into Ag/AgCl; E_{vs NHE} = E_{vs Ag/AgCl}+ E⁰_Ag/AgCl+ 0.059 pH (at 298 K).

^cReference electrode of SCE transfers into Ag/AgCl; E_{vs RHE} = E_{vs SEC}+ E⁰_SEC+ 0.059 pH (at 298 K).