Abstract
The intrinsic reactivity of PtM alloys during the catalysis of oxygen reduction reactions (ORRs) under acidic conditions is deactivated by the unavoidable leaching of cocatalyst M. Herein, we propose an unprecedented “Au-stabilized strategy” to stabilize the Fe atoms in L10-PtAuFe via a strong Au-Fe bond. Simultaneously, the introduction of Au atoms regulates the Pt atomic electronic structure and increases resistance to Pt atomic oxidation, which is beneficial to further boost ORR activity and stability. As a result, the as-obtained L10-PtAuFe exhibits minimal loss of mass activity after accelerated durability tests and is far superior to L10-PtFe and commercial Pt/C. In addition, L10-PtAuFe shows fantastic ORR activity, with a 7.3-fold improvement in mass activity and a 4.5-fold increase in specific activity compared to that of commercial Pt/C. This novel Au-stabilized strategy provides a new avenue to stabilize the M atoms in L10-PtM alloys and further enhance their ORR activity and stability.
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.
