Self-Stabilized Heterometallic Pair Sites for Selective Ethanol Dehydrogenation on Pt–Cr–Ag Alloy CatalystsDivision of Combustion Physics, Lund University, Box 118, Lund, SE-221 00, Sweden.
Division of Synchrotron Radiation Research and NanoLund, Department of Physics, Lund University, Lund, SE-22100, Sweden.
Division of Combustion Physics, Lund University, Box 118, Lund, SE-221 00, Sweden.
Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York, 11973, USA.
Instituto de Desarrollo Tecnológico para la Industria Química, Universidad Nacional del Litoral (UNL) y CONICET, Güemes 3450, Santa Fe, 3000, Argentina.
Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.
Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA, 70118, USA.
Materials Science Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA.
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA.
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA.
Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York, 11973, USA.
Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA, 70118, USA.
Department of Chemistry, Tufts University, Medford, MA, 02155, USA; Department of Chemical and Biological Engineering, Tufts University, Medford, MA, 02155, USA.
Division of Synchrotron Radiation Research and NanoLund, Department of Physics, Lund University, Lund, SE-22100, Sweden; MAXIV Laboratory, Lund University, Lund, SE-22100, Sweden.
Materials Science Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA.
Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA; Division of Chemistry, Brookhaven National Laboratory, Upton, NY, 11973, USA.
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2025 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 64, no 49Article in journal (Refereed) Published
Abstract [en]
Self-stabilized, heterometallic pair-sites can enable fine-tuning of catalytic functionality while also mitigating dynamic structural changes that degrade catalytic performance. This study demonstrates the development and characterization of trimetallic PtxCrxAg1-2x (x ≤ 0.1) alloys with active Pt–Cr pair-ensembles for non-oxidative ethanol dehydrogenation, leveraging predictions that favorable bonding stabilizes Pt–Cr pairs diluted in Ag. Operando X-ray absorption spectroscopy confirms the preferential formation and stability of Pt–Cr pairings dispersed throughout the Ag matrix, and ambient-pressure X-ray photoelectron spectroscopy shows that Pt–Cr sites have significant activity for ethanol dehydrogenation, while suppressing reaction processes that deactivate binary Pt–Ag and Cr–Ag alloys. This work demonstrates that stabilizing heterometallic pair sites within trimetallic alloys provides a new avenue for designing catalysts with discrete active sites that are durable and highly selective.
Place, publisher, year, edition, pages
Wiley , 2025. Vol. 64, no 49
Keywords [en]
Catalyst selectivity, Catalyst stability, Dual atom alloy, Ethanol dehydrogenation, Operando spectroscopy
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:mau:diva-80179DOI: 10.1002/anie.202513844ISI: 001592303400001PubMedID: 41084940Scopus ID: 2-s2.0-105019100690OAI: oai:DiVA.org:mau-80179DiVA, id: diva2:2009247
2025-10-272025-10-272025-12-03Bibliographically approved