Spin-Coated vs. Electrodeposited Mn Oxide Films as Water Oxidation Catalysts
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Films Prepared by Spin-Coating
2.3. Films Prepared by Electrodeposition
2.4. Characterization Techniques
2.5. Electrochemical Measurements
3. Results and Discussion
3.1. Spin-Coated Samples
3.2. Electrodeposited Samples
3.3. Charge Transfer and Transport Mechanisms in Mn2O3-Based Films
3.4. Oxygen/Hydrogen Evolution Measurements
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Sample | On-set Potential a (V vs. RHE) | Tafel Slope (mV·dec−1) | Current Density at 2 V vs. RHE b (mA·cm−2) | O2 Production c (μmol) | Faradaic Efficiency for O2 Production (%) | Faradaic Efficiency for H2 Production (%) |
---|---|---|---|---|---|---|
Mn2O3-SC-TT | 1.61 | 125 | 0.58 | 14 | 78 | 86 |
Mn2O3-SC | 1.58 | 134 | 0.44 | 12 | 95 | 97 |
Mn3O4-SC | 1.75 | 185 | 0.11 | - | - | - |
ED5c | 1.58 | 115 | 1.25 | 48 | 85 | 85 |
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Hernández, S.; Ottone, C.; Varetti, S.; Fontana, M.; Pugliese, D.; Saracco, G.; Bonelli, B.; Armandi, M. Spin-Coated vs. Electrodeposited Mn Oxide Films as Water Oxidation Catalysts. Materials 2016, 9, 296. https://doi.org/10.3390/ma9040296
Hernández S, Ottone C, Varetti S, Fontana M, Pugliese D, Saracco G, Bonelli B, Armandi M. Spin-Coated vs. Electrodeposited Mn Oxide Films as Water Oxidation Catalysts. Materials. 2016; 9(4):296. https://doi.org/10.3390/ma9040296
Chicago/Turabian StyleHernández, Simelys, Carminna Ottone, Sara Varetti, Marco Fontana, Diego Pugliese, Guido Saracco, Barbara Bonelli, and Marco Armandi. 2016. "Spin-Coated vs. Electrodeposited Mn Oxide Films as Water Oxidation Catalysts" Materials 9, no. 4: 296. https://doi.org/10.3390/ma9040296