| Download | - View accepted manuscript: Electrocatalytic activity of non-stoichiometric perovskites toward oxygen reduction reaction in alkaline electrolytes (PDF, 2.0 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1149/1.3655433 |
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| Author | Search for: Yuan, Xiao-Zi1; Search for: Li, Xiaoxia1; Search for: Qu, Wei1; Search for: Ivey, Douglas G.; Search for: Wang, Haijiang1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Fuel Cell Innovation
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| Sponsor | Search for: ECS Battery Division |
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| Format | Text, Article |
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| Conference | 219th Electrochemical Society (ECS) Meeting, May 1-6, 2011, Montreal, Quebec, Canada |
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| Subject | Perovskite LaxCa0.4MnO3; sol-gel method; X-ray diffraction; gas adsorption technique (BET); transmission electron microscopy (TEM); oxygen reduction reaction (ORR) |
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| Abstract | Perovskite LaxCa0.4MnO3 (x = 0.4, 0.5, 0.6) powder was prepared through a sol-gel method and characterized by X-ray diffraction (XRD), a gas adsorption technique (BET) and transmission electron microscopy (TEM). The electrocatalytic properties of LaxCa0.4MnO3/C composites towards the oxygen reduction reaction (ORR) were studied using rotating ring-disk electrode (RRDE) techniques and Koutecky-Levich theory in both 1 M and 6M KOH electrolytes. The results show better ORR activities for non-stoichiometric perovskites than that for stoichiometric La0.6Ca0.4MnO3. The overall electron transfer numbers for these LaxCa0.4MnO3 composites are in the range of 3.2-3.7, and with decreasing values of x the electron transfer number increases and accordingly H2O2 production decreases. These results suggest that the existence of a Mn reduction/oxidation pair in Ca-doped nonstoichiometric perovskites could activate the ORR reaction sites, resulting in improved catalytic activity. |
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| Publication date | 2011 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 19542559 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 4b829105-b537-4326-a288-9ef00537639f |
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| Record created | 2012-02-23 |
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| Record modified | 2020-04-21 |
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