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이진희(Jin Hee Lee),장혜연(Hyeyeon Jang),박지훈(Ji Hoon Park),서정권(Jeong Kwon Suh),장태선(Tae Sun Chang),허일정(Iljeong Heo) 한국자동차공학회 2019 한국 자동차공학회논문집 Vol.27 No.6
Volatile organic compounds(VOCs) have been known to be among the major contributors to air pollution. Catalytic oxidation is a promising way to remove VOCs, but it is highly desirable to proceed at a low temperature due to the energy savings, operating cost, and environmental issue concerns. Platinum group metals(PGMs) are widely employed as active components for the catalytic oxidation of VOCs, but their high cost hampers their industrial applications. As transition metal oxides have also been known to be good oxidation catalysts, they can perhaps replace the PGM-based catalysts for use in VOC removal. In this work, various cerium-zirconium-mixed oxides(CZ) containing other transition metals were synthesized and evaluated for their catalytic activity on benzene oxidation. Copper and silver synergistically enhanced the benzene oxidation performance through a bifunctional mechanism. CZ containing copper and silver catalysts is a potential candidate for replacing the PGM catalyst for use in low-temperature VOC oxidation.