期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 13, 期 7, 页码 1719-1725出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.2c00080
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资金
- National Research Foundation of Korea (NRF) - Korean government (Ministry of Science and ICT, MSIT) [2019R1A2C1089256]
- Basic Science Research Program through the NRF - Ministry of Education [2021R1A6A1A03043682]
- National R&D Program through the NRF - MSIT [2021M3H4A3A01050378]
- Samsung Research Funding & Incubation Center of Samsung Electronics [SRFC-TC2103-04]
- Regional Innovation Strategy (RIS) through the NRF - Ministry of Education [2021RIS-001, 2021RIS-004]
- NRF - Korean government [2021R1A2C1011415]
- U.S. DOE Office of Science Facility [DE-SC0012704]
- National Research Foundation of Korea [2021R1A2C1011415, 2019R1A2C1089256, 2021R1A6A1A03043682, 2021M3H4A3A01050378] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We proposed an interface-engineered oxide-supported Pt nanoparticle-based catalyst, which exhibited improved low-temperature activity toward CO oxidation. The CeOx-TiO2 hybrid oxide support was synthesized by wet-impregnating 1 wt % Ce on TiO2, and the Pt/CeOx-TiO2 catalyst was prepared by impregnating 2 wt % Pt on the CeOx-TiO2 support. The formation of Pt-CeOx-TiO2 interfaces opened up the interface-mediated Mars-van Krevelen CO oxidation pathway, leading to additional interfacial reaction sites for CO oxidation. The specific reaction rate of Pt/CeOx-TiO2 for CO oxidation was increased by 3.2 times compared with Pt/TiO2 at 140 degrees C.
We propose an interface-engineered oxide-supported Pt nanoparticle-based catalyst with improved low-temperature activity toward CO oxidation. By wet-impregnating 1 wt % Ce on TiO2, we synthesized hybrid oxide support of CeOx-TiO2, in which dense CeOx clusters formed on the surface of TiO2. Then, the Pt/CeOx-TiO2 catalyst was synthesized by impregnating 2 wt % Pt on the CeOx-TiO2 supporting oxide. Pt-CeOx-TiO2 triphase interfaces were eventually formed upon impregnation of Pt on CeOx-TiO2. The Pt-CeOx-TiO2 interfaces open up the interface-mediated Mars-van Krevelen CO oxidation pathway, thus providing additional interfacial reaction sites for CO oxidation. Consequently, the specific reaction rate of Pt/CeOx-TiO2 for CO oxidation was increased by 3.2 times compared with that of Pt/TiO2 at 140 degrees C. Our results demonstrate a widely applicable and straightforward method of catalytic activation of the interfaces between metal nanoparticles and supporting oxides, which enabled fine-tuning of the catalytic performance of oxide-supported metal nanoparticle classes of heterogeneous catalysts.
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