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Title: Investigations of Electrochemically Active Regions in Bifunctional Air Electrodes Using Partially Immersed Platinum Electrodes
Authors: Ikezawa, Atsunori
Miyazaki, Kohei  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-5177-3570 (unconfirmed)
Fukutsuka, Tomokazu  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-8731-9078 (unconfirmed)
Abe, Takeshi
Author's alias: 宮崎, 晃平
Issue Date: 2-May-2015
Publisher: Electrochemical Society
Journal title: Journal of the Electrochemical Society
Volume: 162
Issue: 8
Start page: A1646
End page: A1653
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].
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/203173
DOI(Published Version): 10.1149/2.0971508jes
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