| Autor: |
Koshal Kishor, Sulay Saha, Manish Kumar Gupta, Anshuman Bajpai, Moitrayee Chatterjee, Sri Sivakumar, Raj Ganesh Pala |
| Rok vydání: |
2015 |
| Zdroj: |
ECS Meeting Abstracts. :709-709 |
| ISSN: |
2151-2043 |
| DOI: |
10.1149/ma2015-03/3/709 |
| Popis: |
High overpotential, low stability and cost of the electrocatalysts represent significant challenges for oxygen evolution reaction (OER) operating in the acidic medium. In this regard, blending active (usually unstable) and passive (usually not active) components is one of the methods to tackle this challenge. Here, active Zn and passive Ti are blended in Ru-based oxides through co-electrodeposition method. The composition of the electrodes has been optimized by controlling the electrodeposition bath concentration. The surface roughness of the resultant electrode is increased due to introduction of ‘chemical inhomogeneity’ by Ti and ‘structural inhomogeneity’ through Zn. It has been found that incorporation of Zn and Ti additives increase both activity and stability of electrodes. The maximum catalytic activity is found in the composition of Ru0.259Ti0.736Zn0.006Ox with a current density of 63mA/cm2 at an operating voltage of 1.35V (vs Ag/AgCl). The activity of this electrode is four times higher than electrodeposited RuO2 and also higher than other possible binary combinations in Ru-electrodes (RuTi, RuZn). The stability of the electrodes among the co-electrodeposited electrodes are found to be in order of co-electrodeposited RuZn |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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