Direct Synthesis of H2O2 by a H2/O2 Fuel Cell

Direct synthesis of H2O2 solutions by a fuel cell method was reviewed. The fuel cell reactor of [O2, gas-diffusion cathode \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ | $$\end{document} electrolyte solutions \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ | $$\end{document} Nafion membrane \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ | $$\end{document} electrolyte solutions \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ | $$\end{document} gas-diffusion anode, H2] is very effective for formation of H2O2. The three-phase boundary (O2(g)–electrode(s)–electrolyte(l)) in the gas-diffusion cathode is essential for efficient formation of H2O2. Fast diffusion processes of O2 to the active surface and of H2O2 to the bulk electrolyte solutions are essential for H2O2 accumulation. The maxima H2O2 concentrations of 1.2 M (3.5 wt%) and 2.4 M (7.0 wt%) were accomplished by the heat-treated Mn-OEP/AC electrocatalyst with H2SO4 electrolyte and by the VGCF electrocatalyst with NaOH electrolyte, respectively, under short circuit conditions.