催化作用
氧化物
材料科学
纳米颗粒
化学工程
金属
纳米技术
化学
冶金
有机化学
工程类
作者
M.H. Yoo,Eunji Kang,Hyunwoo Ha,Jieun Yun,Hyuk Soon Choi,Ju Hyeok Lee,Tae Jun Kim,Jiho Min,Ji Yong Choi,Kug‐Seung Lee,Namgee Jung,Sungtak Kim,Chunjoong Kim,Young‐Sang Yu,Hyun You Kim
标识
DOI:10.1021/acs.jpclett.2c00080
摘要
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 °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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