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

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number4201
JournalNature communications
Volume11
Issue number1
DOIs
Publication statusPublished - 2020 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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