250415_cpy131_repro_ECbalanced_05
Type: Nanoparticle powder sample show more
ObjectId: 37818
Created: 11/20/2025 10:36:05 PM by A09) Anastasiia Kotova [kotovaai2015@gmail.com]
Updated: 6/15/2026 10:57:55 AM by A09) Anastasiia Kotova [kotovaai2015@gmail.com]
Access: Public Sort Code (asc): -50
License: CC BY 4.0
Description:
The freshly prepared ink of 1 µg/µL Co3O4 NPs (cpy131_repro) sonicated (Elmasonic P, 37 Hz, power = 100) in DI water for 15 min. A glassy carbon disk electrode with a geometric area of 0.5 cm2 (RDE) was polished (3.00 min, GCE polish disks 1 μm, 0.3 μm and 0.05 μm with Al2O3 suspension), loaded with 50 μL of ink by drop casting (micropipette, catalyst loading 100 µg cm-2), and dried for 30 min under Ar stream with heating at 65 oC. 200ml of 100mM KOH was Ar bubbled before experimant for 15 min.
- OCP
- EIS at OCP
- 10CVs (from OCP to 0.40V vs. Hg/HgO, scan rate 50 mV/s)
- 30CVs (from OCP to 0.60V vs. Hg/HgO, scan rate 50 mV/s)
- LSV (from OCP to 0.73 V vs. Hg/HgO, scan rate 5 mV/s)
- EIS @ 0.73V vs. Hg/HgO
- EIS @ 0.75V vs. Hg/HgO
- EIS @ 0.80V vs. Hg/HgO
- OCP
[no file attached]
: Co-O
Composition
| Element | Absolute | Percentage | |
|---|---|---|---|
| Co | 3 | 42.857 % | |
| O | 4 | 57.143 % |
Associated Objects
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AK250415_102_EISatOCP_a_Co3O4_cpy131_GC_RDE
PEIS (xlsx, csv, txt) AK250415_102_EISatOCP_a_Co3O4_cpy131_GC_RDE.csv -
AK250415_107_EISat730mV_a_Co3O4_cpy131_GC_RDE
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AK250415_109_EISat750mV_a_Co3O4_cpy131_GC_RDE
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AK250415_111_EISat800mV_a_Co3O4_cpy131_GC_RDE
PEIS (xlsx, csv, txt) AK250415_111_EISat800mV_a_Co3O4_cpy131_GC_RDE.csv
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250415_cpy131_repro_ECbalanced_6
Nanoparticle powder sample250415_cpy131_repro_ECbalanced_05 was EC modified
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cpy131_calc_repro (spherical-Co3O4-H2O)
Nanoparticle powder samplereproduction of cpy131_komb_calc
Referenced Objects (Reverse Association)
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CV-preconditioning study of Co3O4 nanoparticles
Idea or experiment planTo study the effect of pre-conditioning on Co3O4 OER activity by tuning the catalyst during pre-OER by using different CV/LSV scan rates. This provides a comprehensive indication of the integrated charge (Qimb), which can be used to classify the pre-conditioning protocols as charge balanced (Qimb≈0), anodic excess (Qimb>0), and cathodic excess (Qimb<0) regimes.
To evaluate OER activity LSV and EIS will be applied. To reveal structural differences ex-situ Raman and XPS will be conducted as a post-electrochemical characterisation.
All properties (except table)
No properties found