Abstract

Composition determinations of individual sub-10 nm metal particles in Pt Rh/alumina by analytical electron microscopy are consistent with a low-temperature miscibility gap below about 750°C in this system. Pt-rich alloy particles are more active than pure Pt for the reduction of nitric oxide with hydrogen at temperatures ≤ 300°C. Rh-rich particles appear to have low activity for this reaction. Catalysts which contain a bimodal distribution of Pt-rich and Rh-rich particles are not as active as pure Pt. Composition versus size plots of small metal particles appear to comprise a new characterization method for supported metal catalysts.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.