Supporting information for Metal-free nanostructured-carbon inks for a sustainable fabrication of zinc/air batteries: From ORR activity to a simple prototype [Dataset]
9 figures, 6 tables.-- S.3.1. Linear sweep voltammetry: The LSV experiments were performed at a scan rate of 50 mV·s-1 in oxygen-saturated 0.1 M KOH. The scan in the nitrogen-saturated electrolyte is also presented. Apart from the 5 electrodes with the CNT inks, a reference catalyst Pt/C (60%) was t...
| Authors: | , , , , , , , , , , |
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| Format: | conjunto de datos |
| Publication Date: | 2023 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/353921 |
| Online Access: | http://hdl.handle.net/10261/353921 |
| Access Level: | Open access |
| Keyword: | http://metadata.un.org/sdg/7 Ensure access to affordable, reliable, sustainable and modern energy for all |
| Summary: | 9 figures, 6 tables.-- S.3.1. Linear sweep voltammetry: The LSV experiments were performed at a scan rate of 50 mV·s-1 in oxygen-saturated 0.1 M KOH. The scan in the nitrogen-saturated electrolyte is also presented. Apart from the 5 electrodes with the CNT inks, a reference catalyst Pt/C (60%) was tested. S.4. Specific capacitance: We calculated the double-layer capacitance (DLC) from CV at scan rates ranging from 0 to 150 mV·s-1 on a GC electrode of 4 mm diameter and 0.06 μF·cm-2 specific capacitance. The capacitive current was determined as the difference between the cathodic and anodic current at a given potential. Capacitive currents were plotted vs. the scan rate (Figure 4.b) and the calculated slope was divided by 2 to obtain the electrode capacitance. Next, the specific capacitance was calculated dividing the electrode capacitance by the real specific surface area from AFM (Table S.6). The area of vertical nano-crevices is not considered because of the cantilever tip size, resulting in an underestimated surface. Nonetheless, the use of AFM to obtain the specific capacitance has been recommended in the case of low RF surfaces [13].-- S.5. Stability tests: The stability of the carbon-based catalysts was assessed on the GC electrode by CV. Up to 1,600 cycles were performed in the O2 saturated electrolyte without rotating the electrode. Two control measurements, before and after the series in static, were performed with a rotation speed of 1,600 rpm.-- Under a Creative Commons license CC-BY 4.0 |
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