Table 1 Comparison of faradaic efficiencies for CO2 reduction to formate for different electrocatalysts studied in this work in 0.1 M KHCO3 at room temperature

From: Direct formation of copper nanoparticles from atoms at graphitic step edges lowers overpotential and improves selectivity of electrocatalytic CO2 reduction

Catalyst

Preparation method

Cu loading (wt%)

Current density at -0.38 V vs RHE (μA/cm2)

FECHOO- (%)

Partial current density (μA/cm2)

Cu/GNF

Atomic deposition of Cu in vacuum

0.84

69

94

65

Cu/GNF

Atomic deposition of Cu in vacuum

3.38

200

18

36

Cu/GNF

Wet chemical deposition of Cu

0.30

70

40

28

Cu/GNF

Wet chemical deposition of Cu

1.32

90

60

54

Cu foil

Commercial

N/A

47

40

19

GNF

Commercial

N/A

3

<1

<<1

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