#11_Co3O4_Nanoparticle_Electrode
Type: Sample show more
ObjectId: 29171 ExternalId: 11084
Created: 8/11/2025 11:33:52 AM by A09) Leppin Christian [christian.leppin@rub.de]
Updated: 8/11/2025 1:05:25 PM by A09) Leppin Christian [christian.leppin@rub.de]
Access: Public Sort Code (asc): 0
Description: Elab Identifier: CL250528_001_Co3O4_QCM#11, Preparation Procedure: The Co3O4 nanoparticle electrodes with a small catalyst loading were fabricated by spin-casting (Laurell WS-400BX-6NPP/LITE) 20 µL of Co3O4 ink at 4000 rpm for 5 min onto a gold-coated quartz crystal microbalance (QCM, BeamTech) resonator, which served as the current collector. The ink was prepared by dispersing Co3O4 nanoparticles (cpy_131_repro_calc) in Milli-Q water to achieve a concentration of 0.1 mg mL⁻¹. The exact catalyst loading cannot be directly derived from the dispersion’s concentration and cast volume. It is, however, approximated to be 1.7 µg cm⁻² at the maximum, as excess solution is expelled from the substrate during spinning.
[no file attached]
: Co-O
Associated Objects
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Au QCM
SubstrateTi/Au QCM (BeamTech; fundamental frequency: 5 MHz, diameter: 14 mm)
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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.
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2025-05-29 CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq1
Raw Document 2025-05-29 CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq1.zip -
2025-05-30 CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq1
Raw Document 2025-05-30 CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq1.zip -
2025-05-30 CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq1
Raw Document 2025-05-30 CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq1.zip -
all_result_3_comparison_SmallLoading
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CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq1
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CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq1_05_CV_C01
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CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq4
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CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq4_06_CV_C01
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CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq1
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CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq1_05_CV_C01
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CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq4
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CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq4_06_CV_C01
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CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq1
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CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq1_05_CV_C01
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CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq4
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CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq4_06_CV_C01
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Overpotentials_EQCM_SmallLoading
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R3_AllCVData_indexed
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R3_AllEQCMData_indexed
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R3_Intercycle_Variations
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R3_MPE
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R3_result_3
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R3_result_3_conditioning
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R3_tafel_plot_data_all
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R3_Tafel_slopes_overpotentials
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Tafelslopes_EQCM_SmallLoading
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CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq1_05_CV_C01
CV Measurement (xlsx, csv, txt) CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq1_05_CV_C01.txt -
CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq4_06_CV_C01
CV Measurement (xlsx, csv, txt) CL20250529_001_#11_Co3O4Nps_CV_5mVpers_initial_seq4_06_CV_C01.txt -
CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq1_05_CV_C01
CV Measurement (xlsx, csv, txt) CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq1_05_CV_C01.txt -
CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq4_06_CV_C01
CV Measurement (xlsx, csv, txt) CL20250530_002_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_0p8V_MSE_eq_1p73V_RHE_seq4_06_CV_C01.txt -
CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq1_05_CV_C01
CV Measurement (xlsx, csv, txt) CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq1_05_CV_C01.txt -
CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq4_06_CV_C01
CV Measurement (xlsx, csv, txt) CL20250530_003_#11_Co3O4Nps_CV_5mVpers_after1h_CA_at_1p0V_MSE_eq_1p93V_RHE_seq4_06_CV_C01.txt