Skip to main content
. 2021 Aug 9;11(8):2029. doi: 10.3390/nano11082029

Table 1.

Performance of cobalt-based electrocatalysts for Electrochemical CO2 reduction.

Cobalt Group Electrocatalysts Electrolytic Solution Potential Current Density (mA/cm−2) Main
Product		 Faradic Efficiency (%) Stability (h) Ref
Single
atom		 Atomic cobalt layers 0.1 M Na2SO4 −0.85 V vs. SCE 10 COOH 90 60 [167]
single-atom Co–Tpy-c 0.5 m NaClO4 −0.7 to −1.0 V (vs RHE) 46.6 CO 95 24 [116]
Co/SL-NG 0.1 M NaHCO3 −0.9 V vs. SCE 4 CH3OH 71.4 10 [120]
Co1-N4 0.1 M KHCO3 −0.8 V vs. RHE 15.8 CO 82 10 [121]
Single atom Co-N5 0.2 M NaHCO3 −0.73 V vs. RHE 6.2 CO 90 10 [43]
Multi
metals		 Ag-Co 0.5 M KHCO3 −2 V vs. SHE NA CH4 ~20 NA [130]
Cu-Co 0.1 M KHCO3 −1.1 V vs. RHE 30 H2 85 NA [128]
Co3O4/Sn 0.5 M KHCO3 2 V NA HCOOH 92.6 NA [136]
Co3S4 @Co3O4 0.1 M Na2SO4 −0.64 V vs. RHE 10 HCOOH 85.3 NA [139]
Cu-Co 0.1 M KHCO3 −1.1 V vs. RHE 30 H2 85 NA [128]
Co3O4/Sn 0.5 M KHCO3 2 V HCOOH 92.6 NA [136]
Co3O4 single-unit-cell layer 0.1 M KHCO3 −0.87 V vs. SCE 2.7 COOH >85 40 [168]
Ultrathin Co3O4 0.1 M KHCO3 −0.88 V vs. SCE 0.68 COOH 60 20 [132]
Co3O4 nanofibers 0.1 M TBAPF6 in ACN + 1%vol H2O −1.5 V vs. NHE 10 CO 65 8 [131]
Co3O4 0.1 M KHCO3 −0.88 V vs. SCE 0.68 HCOOH 60 20 [132]
CoO anode 0.5 M KHCO3 2 V 4.4 C2H5OH 96.5 NA [133]
FeOx/Cox 0.5 M KHCO3 −0.55 V vs. RHE 14.49 CO 80 10 [134]
Cobalt
nitrides		 MOL-Co-N3 1.0 M KHCO3 −0.5 V vs. RHE 18.8 CO 99 10 [43]
700-Co5.47N/C 0.5 M NaHCO3 −0.7 V vs. RHE 9.78 CO NA 10 [44]
CoNC 0.1 M KHCO3 −0.6 V versus RHE 4.5 CO 45% NA [45]
Single site catalyst STPyP-Co 0.5 M KHCO3 −0.62 V vs. RHE 6.5 CO 96 48 [46]
Atomically dispersed
(Co-N2)		 0.5 M KHCO3 −0.63 V vs. RHE 18.1 CO 94 60 [47]
700-Co5.47N/C 0.5 M NaHCO3 −0.7 V vs. RHE 9.78 CO NA 10 [44]
Cobalt-complexes Co Complexes 0.1 M NBu4BF4 in DMF + H2O −2 V vs. Fc + /0 COOH 90 1 [64]
Cobalt phthalocyanine @MWCNT 1 M KOH −0.92 V vs. RHE 165 CO 99 3 [65]
Cobalt Phthalocyanine 0.1 M KHCO3 −0.8 vs. RHE 3 CO 99 1.3 [67]
CoPc-P4VP 0.5 M KHCO3 −0.68 V vs. RHE 30 CO >90 12 [68]
Co(ii) bipyricorrole DMF
5 M H2O		 0.35 V vs. Fc + / CO 75 1 [69]
Cobalt protoporphyrin 0.1 M HClO4 −0.6 V vs. RHE 0.44 CO 60 1 [70]
Cobalt protoporphyrin 0.1 M perchlorate −0.6 V vs. RHE CO 60 1.3 [70]
Co-tetraphenylporphyrin-NH2 0.1 M NBu4PF6 −2.42 V vs. Ag/AgCl H2 99 4 [71]
Cobalt MOF/COFs Metallophthalocyanine (MOF) KHCO3 −0.74 V vs. RHE 17.3 CO 85 10 [121]
Cobalt porphyrin
(COFs)		 0.5 M KHCO3 –0.67 V vs. RHE 5 CO 90 24 [161]
Cobalt-porphyrin 0.5 M KHCO3 −0.67 V vs. RHE 5.5 CO 76 7 [164]
MOF-1992 0.1 M KHCO3 −0.52 V vs. RHE 16.5 CO 80 6 [165]
Ag/Co- MOF 0.1 M KHCO3 −1.8 V vs. SCE 20 CO 45 10 [166]