Abstract
This paper reports a detailed electrochemical in situ surface-enhanced infrared reflection absorption spectroscopic (SEIRAS) investigation of two different core−shell, Ru@Pt and Au@Pt/C, metal nanoparticles (NPs). We were able to identify the most active sites and surface water species involved in the carbon monoxide oxidation reaction (COR) and methanol oxidation reaction (MOR) on these NPs. We discovered that exposing the as-synthesized Ru@Pt NPs to air could turn them into largely surface-ruthenated NPs whose structure was rather stable under multiple potential cyclings between −0.2 and 0.7 V (vs Ag/AgCl, 3 M) and reduction at −0.3 V but could be annealed by the COR. The SEIRAS data enabled the identification of the Ru-coordinated-to-Ru, Ru-coordinated-to-Pt, and Pt-islands-on-Ru-core sites on the COR-annealed Ru@Pt NPs among which the most active sites were the Pt-islands-on-Ru-core sites for the COR and MOR, as evidenced by an onset potential as low as −0.1 V for the COR. For the Au@Pt/C NPs, the SEI...
Sign-in/Register to access full text options 
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 callDisclaimer: 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.
