mA cm-2. Stirring was magnetically and kept constant when used. A Crison basic 20 pH meter and probe were employed for pH recording. A homemade double acrylic cell with a total capacity of 400 cm3 was adapted with a commercial Nafion 117® membrane (Dupont) for the experiments were the separation of cathode and anodes were required. The iron electrodes were immersed in the electrolyte, with a separation of 2 cm, during the electrosynthesis. For oxygen effect evaluation, the solutions were deoxygenated by bubbling N2 over 20 min before the iron electrodes were immersed in solution and connected to the power supply. The electrosynthesis would then be carried out typically (30 min reaction with 50 mA or a stream of O2 would be bubbled into the solution at a controlled rate of 1-35 cm3 min-1 under normal conditions using a Bronkhorst EL-FLOW F-201CV mass flow controller. The effect of hydrogen on the electrosynthesis was also studied by electrochemically generating H2 in an electrolysis cell. The cathodically produced gas was bubbled into a solution containing to investigate the possibility of oxyhydroxide γ-FeOOH reduction reported by some authors18–20. Reaction products were magnetically collected by placing a neodymium magnet underneath the cell. The electrolyte was decanted and the solid products were thoroughly rinsed three times with deionized water, they were then collected and centrifuged at 10,000 rpm for 10
mA cm-2. Stirring was magnetically and kept constant when used. A Crison basic 20 pH meter and probe were employed for pH recording. A homemade double acrylic cell with a total capacity of 400 cm3 was adapted with a commercial Nafion 117® membrane (Dupont) for the experiments were the separation of cathode and anodes were required. The iron electrodes were immersed in the electrolyte, with a separation of 2 cm, during the electrosynthesis. For oxygen effect evaluation, the solutions were deoxygenated by bubbling N2 over 20 min before the iron electrodes were immersed in solution and connected to the power supply. The electrosynthesis would then be carried out typically (30 min reaction with 50 mA or a stream of O2 would be bubbled into the solution at a controlled rate of 1-35 cm3 min-1 under normal conditions using a Bronkhorst EL-FLOW F-201CV mass flow controller. The effect of hydrogen on the electrosynthesis was also studied by electrochemically generating H2 in an electrolysis cell. The cathodically produced gas was bubbled into a solution containing γ-FeOOH to investigate the possibility of oxyhydroxide reduction reported by some authors18–20. Reaction products were magnetically collected by placing a neodymium magnet underneath the cell. The electrolyte was decanted and the solid products were thoroughly rinsed three times with deionized water, they were then collected and centrifuged at 10,000 rpm for 10
New_insights_into_the_electrochemical_formation_of_magnetite_nanoparticles.docx