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Restructuring the interfacial active sites to generalize the volcano curves for platinum-cobalt synergistic catalysis.
- Source :
-
Nature communications [Nat Commun] 2024 Oct 18; Vol. 15 (1), pp. 8995. Date of Electronic Publication: 2024 Oct 18. - Publication Year :
- 2024
-
Abstract
- Computationally derived volcano curve has become the gold standard in catalysis, whose practical application usually relies on empirical interpretations of composition or size effects by the identical active site assumption. Here, we present a proof-of-concept study on disclosing both the support- and adsorbate-induced restructuring of Pt-Co bimetallic catalysts, and the related interplays among different interfacial sites to propose the synergy-dependent volcano curves. Multiple characterizations, isotopic kinetic investigations, and multiscale simulations unravel that the progressive incorporation of Co into Pt catalysts, driven by strong Pt-C bonding (metal-support interfaces) and Co-O bonding (metal-adsorbate interfaces), initiates the formation of Pt-rich alloys accompanied by isolated Co species, then Co segregation to epitaxial CoO <subscript>x</subscript> overlayers and adjacent Co <subscript>3</subscript> O <subscript>4</subscript> clusters, and ultimately structural collapse into amorphous alloys. Accordingly, three distinct synergies, involving lattice oxygen redox from Pt-Co alloy/Co <subscript>3</subscript> O <subscript>4</subscript> clusters, dual-active sites engineering via Pt-rich alloy/CoO <subscript>x</subscript> overlayer, and electron coupling within exposed alloy, are identified and quantified for CO oxidation (gas-phase), ammonia borane hydrolysis (liquid-phase), and hydrogen evolution reaction (electrocatalysis), respectively. The resultant synergy-dependent volcano curves represent an advancement over traditional composition-/size-dependent ones, serving as a bridge between theoretical models and experimental observations in bimetallic catalysis.<br /> (© 2024. The Author(s).)
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 15
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 39424795
- Full Text :
- https://doi.org/10.1038/s41467-024-53474-0