Access count of this item: 76
|Title:||Investigations of Electrochemically Active Regions in Bifunctional Air Electrodes Using Partially Immersed Platinum Electrodes|
Miyazaki, Kohei https://orcid.org/0000-0001-5177-3570 (unconfirmed)
Fukutsuka, Tomokazu https://orcid.org/0000-0002-8731-9078 (unconfirmed)
|Author's alias:||宮崎, 晃平|
|Journal title:||Journal of the Electrochemical Society|
|Abstract:||Oxygen reduction reaction (ORR) and oxygen evolution reactions (OER) on glassy-carbon-supported platinum electrodes (Pt/GCs), which are partially immersed in alkaline electrolytes, are investigated as a model of the triple phase boundary (TPB) in air electrodes for metal-air secondary batteries. ORR currents are measured with changing the vertical position of Pt/GCs, and OER currents are measured by linear sweep voltammetry. Based on the electrochemical results, it is found that thin liquid film on Pt/GCs effectively serves to expand TPB regions for ORR, but the liquid film hardly increases OER currents. Therefore, we conclude that the most effective TPB form are determined by the electrode reactions (ORR or OER), which are corresponding to discharge and charge processes for metal-air secondary batteries. In practice, it is strongly necessary to control the wettability of electrode inside, in order to construct high-performance bifunctional air electrodes.|
|Rights:||© The Electrochemical Society, Inc. 2015. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in [doi: 10.1149/2.0971508jes, J. Electrochem. Soc. 2015 volume 162, issue 8, A1646-A1653].|
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|Appears in Collections:||Journal Articles|
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