Fig. 2: Electrochemical analysis of EMPO. | Nature Communications

Fig. 2: Electrochemical analysis of EMPO.

From: Electro-assisted methane oxidation to formic acid via in-situ cathodically generated H2O2 under ambient conditions

Fig. 2

a Performance comparison of a system using commercial H2O2 (c25-H2O2 and c70-H2O2 indicate reactions conducted at 25 °C and 70 °C, respectively) and the EMPO system (e-H2O2). The error bars represent the standard deviation. b EPR spectra of the electrolytes before (gray line) and after applying potential (0 V vs. RHE) under O2(g) (red line) and O2(g)+CH4(g) (blue line) flowing with DMPO. c CH3OOH production after EMPO reaction in the presence of 400 μmol of scavengers. TBA and BQ are radical scavengers that can trap ∙OH and ∙OOH, respectively. d Chronoamperometry under O2 + Ar and O2 + CH4 purging at 0 V (vs. RHE); O2, Ar, and CH4: 100 sccm. e Polarization curves in the presence of 0–40 mM of CH3OOH in a 0.05 M H2SO4 electrolyte. The black, red, orange, green, and blue lines represent blank, 5, 10, 20, and 40 mM conditions, respectively. f Result of methanol oxidation using ORR. Source data are provided as a Source Data file.

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