#43_Co3O4_Nanoparticle_Electrode
Type: Sample show more
ObjectId: 29179 ExternalId: 11087
Created: 8/11/2025 2:05:48 PM by A09) Leppin Christian [christian.leppin@rub.de]
Updated: 8/13/2025 5:49:32 PM by A09) Leppin Christian [christian.leppin@rub.de]
Access: Public Sort Code (asc): 0
Description: ElabID: CL20250726_001_Co3O4#43, Preparation Procedure: The Co3O4 nanoparticle electrodes with a high catalyst loading (42.7 µg cm-2) were fabricated by drop-casting 100 µL of Co3O4 ink onto a gold-coated quartz crystal microbalance (QCM) resonator, which served as the substrate. The ink was prepared by dispersing Co3O4 nanoparticles in Milli-Q water to achieve a concentration of 0.5 mg mL⁻¹.
[no file attached]
: Co-O
Associated Objects
-
cpy_131_repro_calc
SampleThe nanoparticles were provided from the Schulz-Group. Synthesis description: For the synthesis of spherical Co3O4 nanoparticles, 1.164 g Co(NO3)2·6 H2O (4.0 mmol) was dissolved in 200 mL water in an open reactor vessel. Subsequently, 3.24 mL of ammonium hydroxide solution and 240 µL of H2O2 were added. The black reaction mixture was then heated to 60 °C for 15 minutes. A solution containing 0.58 g Co(NO3)2·6 H2O (2 mmol) dissolved in 80 mL water was added and the reaction temperature was maintained at 60 °C for 3 hours. After cooling to room temperature, the nanoparticles were collected by centrifugation at 3000 rpm, washed with water and acetone and dried in air. The particles were then heated at a rate of 4.5 °C min-1 to 300 °C, where the temperature was maintained for 15 minutes before cooling to room temperature.
