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Catalytic Activity of Titanium and Ruthenium Oxide Nanosheets in the Oxygen Reduction Reaction

Published online by Cambridge University Press:  20 August 2019

Takahiro Saida ,
Miyu Mashiyama  and
Takahiro Maruyama
Takahiro Saida*
Affiliation:
Department of Applied Chemistry, Faculty of Science and Technology, Meijo University, 1-501 Shiogamaguchi, Tempaku, Aichi, Nagoya468-8502Japan Division of Applied Chemistry, Graduate School of Science and Technology, Meijo University, 1-501 Shiogamaguchi, Tempaku, Aichi, Nagoya468-8502Japan
Miyu Mashiyama
Affiliation:
Division of Applied Chemistry, Graduate School of Science and Technology, Meijo University, 1-501 Shiogamaguchi, Tempaku, Aichi, Nagoya468-8502Japan
Takahiro Maruyama
Affiliation:
Department of Applied Chemistry, Faculty of Science and Technology, Meijo University, 1-501 Shiogamaguchi, Tempaku, Aichi, Nagoya468-8502Japan Division of Applied Chemistry, Graduate School of Science and Technology, Meijo University, 1-501 Shiogamaguchi, Tempaku, Aichi, Nagoya468-8502Japan
*
*(Email: [email protected])
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Abstract:

Monolayer molecular electrodes composed of titanium oxide nanosheets (TiO2ns) or ruthenium oxide nanosheets (RuO2ns) were prepared and their activities in the oxygen reduction reaction (ORR) were evaluated to investigate the ORR active sites in oxide catalysts. In TiO2ns, the influence of physical distortion sites in the crystal structure formed by introducing oxygen vacancies was determined. The ORR activity of TiO2ns was improved by introducing physical distortion sites. In RuO2ns, the effects of both the type of crystal structure and electrochemical distortion sites arising from redox reactions on ORR performance were studied. The type of crystal structure had almost no effect on ORR activity. In contrast, electrochemical distortion sites were expected to behave as the ORR active sites because the on-set potential of the ORR was similar to the redox peak position for the RuO2ns. Thus, the distortion sites in oxide crystal structures may behave as the active sites in the ORR independent of the metal species.

Keywords

chemical reactionoxide
Type
Articles
Information
MRS Advances , Volume 4 , Issue 33-34: Energy and Sustainability , 2019 , pp. 1851 - 1860
Copyright
Copyright © Materials Research Society 2019 

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