Fig. 3: Electro-chemical performance of Cu2(OH)2CO3 tablet. | Nature Communications

Fig. 3: Electro-chemical performance of Cu2(OH)2CO3 tablet.

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

Fig. 3

a LSV curves recorded in 2 M KHCO3 at a scan rate of 50 mV s−1 of Cu2(OH)2CO3 tablet anode. b Galvanostatic charge/discharge behaviors of Cu2(OH)2CO3 tablet and graphite oxide with an applied constant current density of 1 (Cu2(OH)2CO3 tablet) and 0.5 (graphite) mA cm−2 measured by Chronopotentiometry measurement. c Nyquist plots of Cu2(OH)2CO3 tablet anode in 50 mL 0.5 M Na2SO4 with different pH and corresponding fitting circuit diagram. d LSV curves were recorded in 0.5 M Na2SO4 electrolyte with or without 30 ppm H2O2 addition at a scan rate of 50 mV s−1 of Cu2(OH)2CO3 tablet. e Electro-decomposition rate of H2O2 on Cu2(OH)2CO3 tablet anode at different potentials in 0.5 M Na2SO4. f Self-decomposition rate constants of H2O2 with 1 mM initial concentrations in 2 M KHCO3 or 0.5 M Na2SO4 solution. pH error bars represent the standard deviation of three measurements. Acidic (4.17 ± 0.1), basic (11.33 ± 0.07), and the initial pH of 0.5 M Na₂SO₄ (7.15 ± 0.15). Source data for Fig. 3a–f are provided as a Source Data file. The voltage is not iR corrected in all electro-experiments.

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