Fig. 4: Investigation of the active component of the Cu2(OH)2CO3 tablet Electrode. | Nature Communications

Fig. 4: Investigation of the active component of the Cu2(OH)2CO3 tablet Electrode.

From: Crystal OH mediating pathway for hydrogen peroxide production via two-electron water oxidation in non-carbonate electrolytes

Fig. 4

a Picture of 50 mL 0.5 M Na2SO4 solution with Cu2(OH)2CO3 tablet or Cu2(OH)2CO3 powder addition. b H2O2 production concentration of graphite under the potential of 3.4 V vs. RHE in different electrolyte. c H2O2 concentration of Cu2(OH)2CO3 tablet in different concentration of Na2SO4 electrolyte under the potential of 3.4 V vs. RHE. d H2O2 concentration of Cu2(OH)2CO3 tablet in Na2SO4 solution with different pH under the potential of 3.4 V vs. RHE. e FTIR spectra of Cu2(OH)2CO3 obtained from Isotope O18 tracing experiments. f H2O2 generation properties of Cu2(OH)2SO4 tablet in 50 mL Na2SO4 under 3.4 V vs. RHE. The results in Fig. 4b–f are all obtained from a 50 mL electrolyte system. Source data for Fig. 4b–f are provided as a Source Data file. The voltage is not iR corrected in all electro-experiments. The mass of the active materials in all comparative experiments is 2 g.

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