Table 1. Comparison of catalytic performances and conditions for a variety of Cu-based OER molecular catalysts.
| Catalyst | Catalyst concentration (mM) | pH | Onset η a (mV) | TOF (s–1) | Reference |
| Cu porphyrin 1 | 1.0 | 7.0 | 310 | 30 | This work |
| [(bpy)Cu(OH)2] | 1.0 | 12.5 | 540 | 100 | 60 |
| [(TGG4–)CuII(OH2)]2– | 0.89 | 11 | 520 | 33 | 62 |
| [(Py3P)Cu(OH)]– | 0.7 | 8.0 | 400 | 20 | 67 |
| [(dhbp)Cu(OH)2] | 1.0 | 12.4 | 330 | 0.4 | 61 |
| [(L2)Cu]2– | 1.0 | 11.5 | 400 | 3.58 | 64 |
| [(L4)Cu]2– | 1.0 | 11.5 | 170 (not stable) | 0.16 | |
| [Cu(TMC)(H2O)]2+ | 1.0 | 7.0 | 600 | 30 | 73 |
| [Cu(en)2]2+ | 1.0 | 8.0 | 530 | 0.4 | 72 |
| Cu(pyalk)2 | 1.0 | 13.3 | 460 | 0.7 | 66 |
| [pdca–CuII–CO3H]– | 1.0 | 10.0 | 650 | 20.1 | 69 |
| [Cu2(BPMAN)(μ-OH)]3+ | 1.0 | 7.0 | 800 | 0.6 | 63 |
| [(TMPA–CuII)2–(μ-OH)2]2+ | 1.0 | 12.5 | 720 | 33 | 68 |
aThe onset overpotential values for water oxidation mediated by molecular catalysts are generally reported and are used for comparison in the literature. Abbreviations used in this table: bpy, 2,2′-bipyridine; TGG, triglycylglycine; Py3P, N,N-bis(2-(2-pyridyl)ethyl)pyridine-2,6-dicarboxamidate; dhbp, 6,6′-dihydroxy-2,2′-bipyridine; L2 and L4, N1,N1′-(1,2-phenylene)bis(N2-methyloxalamide) derivatives; TMC, 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane; en, 1,2-ethylenediamine; pyalk, 2-pyridyl-2-propanoate; pdca, N,N′-2,6-dimethylphenyl-2,6-pyridinedicarboxamidate; BPMAN, 2,7-[bis(2-pyridylmethyl)-aminomethyl]-1,8-naphthyridine; TMPA, bis((6-methyl-2-pyridyl)methyl)(2-pyridylmethyl)amine.