Electrosynthesis of hydrogen peroxide in a filter-press flow cell using graphite felt as air-diffusion cathode
The electrosynthesis of H2O2 via O2 reduction was feasible employing cheap, unmodified graphite felt on top of carbon cloth as air-diffusion cathode fitted into an undivided filter-press cell. The experiments were performed in a pre-pilot plant with recirculation of 4 dm3 of 0.05 M Na2SO4 solutions...
| Authors: | , , , , |
|---|---|
| Format: | article |
| Status: | Versión aceptada para publicación |
| Publication Date: | 2018 |
| Country: | España |
| Institution: | Universidad de Barcelona |
| Repository: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/152812 |
| Online Access: | https://hdl.handle.net/2445/152812 |
| Access Level: | Open access |
| Keyword: | Grafit Graphite |
| Summary: | The electrosynthesis of H2O2 via O2 reduction was feasible employing cheap, unmodified graphite felt on top of carbon cloth as air-diffusion cathode fitted into an undivided filter-press cell. The experiments were performed in a pre-pilot plant with recirculation of 4 dm3 of 0.05 M Na2SO4 solutions at pH 3.0 upon continuous air feeding to the cathode. The H2O2 electrogeneration occurred within the range -0.30 < E < -0.01 V|SHE, being dependent on the mean linear flow velocity (u), which is related to the mass transport of hydronium ions. Optimum conditions achieved at E = -0.30 V|SHE and u = 27.4 cm s-1 yielded 100.4 mg dm-3 H2O2, with efficiency close to 100% and low energy consumption. |
|---|