Abstract
The behavior of a small-scale flow alkaline fuel cell (AFC) built-up for on-site production of HO{sub 2}{sup -} using commercial gas-diffusion electrodes has been studied. It produces a spontaneous current due to the oxidation of H{sub 2} to H{sub 2}O at the H{sub 2}-diffusion anode and the reduction of O{sub 2} to HO{sub 2}{sup -} at the O{sub 2}-diffusion cathode, while a fresh 1.0-6.0 mol dm{sup -3} KOH electrolyte at 15.0-45.0 {sup o}C is injected through it. Under circulation of HO{sub 2}{sup -}+KOH solutions in open circuit, the flow AFC behaves as a two-electron reversible system. When it is shorted with an external load (R{sub ext}), steady cell voltage-current density curves are found. The use of O{sub 2}/N{sub 2} mixtures to fed the cathode causes a loss of its performance, being required to supply pure O{sub 2} to yield a maximum HO{sub 2}{sup -} electrogeneration. The current density and HO{sub 2}{sup -} productivity increase with raising OH{sup -} concentration, temperature and pressure of O{sub 2} fed. At R{sub ext}=0.10{omega}, a current efficiency close to 100% is obtained, and current densities >100 mA cm{sup -2} are achieved for 1.0 mol dm{sup -3} KOH at 45.0 {sup o}C and for higher KOH
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Brillas, E;
Alcaide, F;
Cabot, P -L
[1]
- Universitat de Barcelona (Spain). Departament de Quimica Fisica
Citation Formats
Brillas, E, Alcaide, F, and Cabot, P -L.
A small-scale flow alkaline fuel cell for on-site production of hydrogen peroxide.
United Kingdom: N. p.,
2002.
Web.
doi:10.1016/S0013-4686(02)00665-5.
Brillas, E, Alcaide, F, & Cabot, P -L.
A small-scale flow alkaline fuel cell for on-site production of hydrogen peroxide.
United Kingdom.
https://doi.org/10.1016/S0013-4686(02)00665-5
Brillas, E, Alcaide, F, and Cabot, P -L.
2002.
"A small-scale flow alkaline fuel cell for on-site production of hydrogen peroxide."
United Kingdom.
https://doi.org/10.1016/S0013-4686(02)00665-5.
@misc{etde_20351065,
title = {A small-scale flow alkaline fuel cell for on-site production of hydrogen peroxide}
author = {Brillas, E, Alcaide, F, and Cabot, P -L}
abstractNote = {The behavior of a small-scale flow alkaline fuel cell (AFC) built-up for on-site production of HO{sub 2}{sup -} using commercial gas-diffusion electrodes has been studied. It produces a spontaneous current due to the oxidation of H{sub 2} to H{sub 2}O at the H{sub 2}-diffusion anode and the reduction of O{sub 2} to HO{sub 2}{sup -} at the O{sub 2}-diffusion cathode, while a fresh 1.0-6.0 mol dm{sup -3} KOH electrolyte at 15.0-45.0 {sup o}C is injected through it. Under circulation of HO{sub 2}{sup -}+KOH solutions in open circuit, the flow AFC behaves as a two-electron reversible system. When it is shorted with an external load (R{sub ext}), steady cell voltage-current density curves are found. The use of O{sub 2}/N{sub 2} mixtures to fed the cathode causes a loss of its performance, being required to supply pure O{sub 2} to yield a maximum HO{sub 2}{sup -} electrogeneration. The current density and HO{sub 2}{sup -} productivity increase with raising OH{sup -} concentration, temperature and pressure of O{sub 2} fed. At R{sub ext}=0.10{omega}, a current efficiency close to 100% is obtained, and current densities >100 mA cm{sup -2} are achieved for 1.0 mol dm{sup -3} KOH at 45.0 {sup o}C and for higher KOH concentrations at 25.0 {sup o}C. The flow AFC can work under optimum conditions up to 6.0 mol dm{sup -3} KOH and 45.0 {sup o}C for possible industrial applications. (author)}
doi = {10.1016/S0013-4686(02)00665-5}
journal = []
issue = {4}
volume = {48}
journal type = {AC}
place = {United Kingdom}
year = {2002}
month = {Dec}
}
title = {A small-scale flow alkaline fuel cell for on-site production of hydrogen peroxide}
author = {Brillas, E, Alcaide, F, and Cabot, P -L}
abstractNote = {The behavior of a small-scale flow alkaline fuel cell (AFC) built-up for on-site production of HO{sub 2}{sup -} using commercial gas-diffusion electrodes has been studied. It produces a spontaneous current due to the oxidation of H{sub 2} to H{sub 2}O at the H{sub 2}-diffusion anode and the reduction of O{sub 2} to HO{sub 2}{sup -} at the O{sub 2}-diffusion cathode, while a fresh 1.0-6.0 mol dm{sup -3} KOH electrolyte at 15.0-45.0 {sup o}C is injected through it. Under circulation of HO{sub 2}{sup -}+KOH solutions in open circuit, the flow AFC behaves as a two-electron reversible system. When it is shorted with an external load (R{sub ext}), steady cell voltage-current density curves are found. The use of O{sub 2}/N{sub 2} mixtures to fed the cathode causes a loss of its performance, being required to supply pure O{sub 2} to yield a maximum HO{sub 2}{sup -} electrogeneration. The current density and HO{sub 2}{sup -} productivity increase with raising OH{sup -} concentration, temperature and pressure of O{sub 2} fed. At R{sub ext}=0.10{omega}, a current efficiency close to 100% is obtained, and current densities >100 mA cm{sup -2} are achieved for 1.0 mol dm{sup -3} KOH at 45.0 {sup o}C and for higher KOH concentrations at 25.0 {sup o}C. The flow AFC can work under optimum conditions up to 6.0 mol dm{sup -3} KOH and 45.0 {sup o}C for possible industrial applications. (author)}
doi = {10.1016/S0013-4686(02)00665-5}
journal = []
issue = {4}
volume = {48}
journal type = {AC}
place = {United Kingdom}
year = {2002}
month = {Dec}
}