Three-Way Catalytic Reaction in an Electric Field for Exhaust Emission Control Application

Toru Uenishi, Ayaka Shigemoto, Yuki Omori, Takuma Higo, Shuhei Ogo, Yasushi Sekine

Research output: Contribution to journalConference articlepeer-review

Abstract

To prevent global warming, further reductions in carbon dioxide are required. It is therefore important to promote the spread of electric vehicles powered by internal combustion engines and electric vehicles without internal combustion engines. As a result, emissions from hybrid electric vehicles equipped with internal combustion engines should be further reduced. Interest in catalytic reactions in an electric field with a higher catalytic activity compared to conventional catalysts has increased because this technology consumes less energy than other electrical heating devices. This study was therefore undertaken to apply a catalytic reaction in an electric field to an exhaust emission control. First, the original experimental equipment was built with a high voltage system used to conduct catalytic activity tests. Second, experiments with palladium cerium-zirconium oxide support catalysts showed that a three-way catalytic activity in an electric field could be found. at lower exhaust temperatures than conventional catalysts. Then it became clear that catalytic compositions that include semiconductor properties are a key for researching and developing this technology. In addition, applied electrical current control has been shown to be another focus of research and development. Finally, experimental results with several reducing species demonstrate that the electron-promoted surface proton and lattice oxygen greatly contributed to catalytic activity in an electric field.

Original languageEnglish
JournalSAE Technical Papers
Issue number2021
DOIs
Publication statusPublished - 2021
EventSAE 2021 WCX Digital Summit - Virtual, Online, United States
Duration: 2021 Apr 132021 Apr 15

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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