Surface oxygenation of multicomponent nanoparticles toward active and stable oxidation catalysts

Shiyao Shan, Jing Li, Yazan Maswadeh, Casey O’Brien, Haval Kareem, Dat T. Tran, Ivan C. Lee, Zhi Peng Wu, Shan Wang, Shan Yan, Hannah Cronk, Derrick Mott, Lefu Yang, Jin Luo, Valeri Petkov, Chuan Jian Zhong

研究成果: Article査読

16 被引用数 (Scopus)

抄録

The need for active and stable oxidation catalysts is driven by the demands in production of valuable chemicals, remediation of hydrocarbon pollutants and energy sustainability. Traditional approaches focus on oxygen-activating oxides as support which provides the oxygen activation at the catalyst-support peripheral interface. Here we report a new approach to oxidation catalysts for total oxidation of hydrocarbons (e.g., propane) by surface oxygenation of platinum (Pt)-alloyed multicomponent nanoparticles (e.g., platinum-nickel cobalt (Pt–NiCo)). The in-situ/operando time-resolved studies, including high-energy synchrotron X-ray diffraction and diffuse reflectance infrared Fourier transform spectroscopy, demonstrate the formation of oxygenated Pt–NiOCoO surface layer and disordered ternary alloy core. The results reveal largely-irregular oscillatory kinetics associated with the dynamic lattice expansion/shrinking, ordering/disordering, and formation of surface-oxygenated sites and intermediates. The catalytic synergy is responsible for reduction of the oxidation temperature by ~100 °C and the high stability under 800 °C hydrothermal aging in comparison with Pt, and may represent a paradigm shift in the design of self-supported catalysts.

本文言語English
論文番号4201
ジャーナルNature communications
11
1
DOI
出版ステータスPublished - 2020 12月 1
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 生化学、遺伝学、分子生物学(全般)
  • 物理学および天文学(全般)

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