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Tuning High‐Temperature Wetting Behavior of Metal toward Ultrafine Nanoparticles

The interaction between the metal nanoparticles and their substrate plays a critical role in determining the particle morphology, distribution, and properties. Here we present the pronounced impact of a thin oxide coating to the dispersion of metal nanoparticles on a carbon matrix. We employ Al2O3‐supported Pt nanoparticles in comparison with direct synthesis of Pt nanoparticles on bare carbon surfaces. Pt nanoparticles with an average size of ≈2 nm and a size distribution ranging between 0.5 nm and 4.0 nm are synthesized on the Al2O3 coated carbon nanofiber, significantly improved compared to those directly synthesized on bare carbon surface. First principles modeling verifies the stronger adsorption of Pt clusters on Al2O3 than on carbon, which attributes the formation of ultrafine Pt nanoparticles. Our strategy paves the way towards the rational design of nanoparticles with enhanced dispersion and controlled particle size, which are promising in energy storage and electrocatalysis.

Autoren:   Yubing Zhou, Bharath Natarajan, Yanchen Fan, Hua Xie, Chunpeng Yang, Shaomao Xu, Yonggang Yao, Feng Jiang, Qianfan Zhang, Jeffrey W. Gilman, Liangbing Hu
Journal:   Angewandte Chemie International Edition
Jahrgang:   2018
Seiten:   n/a
DOI:   10.1002/anie.201712202
Erscheinungsdatum:   18.01.2018
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