State Key Laboratory of Digital Manufacturing Equipment and Technology and School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P.R. China.
State Key Laboratory of Materials Processing and Die and Mould Technology and School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P.R. China.
Angew Chem Int Ed Engl. 2017 Feb 1;56(6):1648-1652. doi: 10.1002/anie.201611559. Epub 2017 Jan 9.
An area-selective atomic layer deposition (AS-ALD) method is described to construct oxide nanotraps to anchor Pt nanoparticles (NPs) on Al O supports. The as-synthesized catalysts have exhibited outstanding room-temperature CO oxidation activity, with a significantly lowered apparent activation energy (ca. 22.17 kJ mol ) that is half that of pure Pt catalyst with the same loading. Furthermore, the structure shows excellent sintering resistance with the high catalytic activity retention up to 600 °C calcination. The key feature of the oxide nanotraps lies in its ability to anchor Pt NPs via strong metal-oxide interactions while still leaving active metal facets exposed. Our reported method for forming such oxide structure with nanotraps shows great potential for the simultaneous enhancement of thermal stability and activity of precious metal NPs.
本文介绍了一种区域选择性原子层沉积（AS-ALD）方法，用于构建氧化物纳米陷阱，以将 Pt 纳米颗粒（NPs）锚定在 Al2O3 载体上。所合成的催化剂表现出优异的室温 CO 氧化活性，表观活化能（约 22.17 kJ/mol）显著降低，约为相同负载量的纯 Pt 催化剂的一半。此外，该结构表现出优异的抗烧结性能，在高达 600°C 的煅烧温度下仍保持高催化活性。氧化物纳米陷阱的关键特征在于其通过强金属-氧化物相互作用锚定 Pt NPs 的能力，同时保持暴露的活性金属面。我们报道的形成这种具有纳米陷阱的氧化物结构的方法为同时提高贵金属 NPs 的热稳定性和活性提供了巨大的潜力。
