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使用纳米晶体和原子层沉积的封装Pt催化剂的稳定性

Gennaro Liccardo1,2, Melissa C Cendejas3, Shyama C Mandal1,2

  • 1Department of Chemical Engineering and SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, United States.

Journal of the American Chemical Society
|August 13, 2024
PubMed
概括

纳米颗粒 (Pt NPs) 上的覆盖层显著提高了催化剂对烧结的稳定性,提高了排放控制等应用的效率. 这种方法通过防止颗粒生长来优化稀缺的使用.

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Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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