articleACS CatalysisApr 12, 2022Closed access

Engineering Cobalt Oxide with Coexisting Cobalt Defects and Oxygen Vacancies for Enhanced Catalytic Oxidation of Toluene

YLYifei LiTCTingyu ChenSZShuaiqi ZhaoPWPeng WuYCYanan Chong

South China University of Technology

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Abstract

Most research studies reported that oxygen vacancies on transition metal oxides are crucial for improving the catalytic oxidation activities. However, few studies investigated the coexistence effect of metal defects and oxygen vacancies on the performances and mechanisms of catalysts. Herein, we present a facile approach for synthesizing a Co3–xO4–y catalyst with both cobalt defects and oxygen vacancies simultaneously, exhibiting significant thermo-/photothermo-catalytic performance for toluene oxidation (300 ppm, GHSV = 72,000 mL g–1 h–1) with over 90% toluene conversion in 10 min of light illumination (with a corresponding light-to-heat conversion temperature of ∼180 °C). Furthermore, the synchrotron…

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Topics & keywords

Topics
Keywords
  • Catalysis
  • Cobalt
  • Toluene
  • Oxygen
  • Transition metal
  • Cobalt oxide
  • Oxide
  • Materials science
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