Effects of Metal Composition and Ratio on Peptide-Templated Multimetallic PdPt Nanomaterials

Merrill, Nicholas A.; Nitka, Tadeusz T.; McKee, Erik M.; Merino, Kyle C.; Drummy, Lawrence F.; Lee, Sungsik; Reinhart, Benjamin; Ren, Yang; Munro, Catherine J.; Pylypenko, Svitlana; Frenkel, Anatoly I.; Bedford, Nicholas M.; Knecht, Marc R.

doi:10.1021/acsami.6b11651

Title: Effects of Metal Composition and Ratio on Peptide-Templated Multimetallic PdPt Nanomaterials

Journal Article · Mon Feb 27 00:00:00 EST 2017 · ACS Applied Materials and Interfaces

DOI:https://doi.org/10.1021/acsami.6b11651· OSTI ID:1344949

Merrill, Nicholas A. ^[1];

^[2]; McKee, Erik M. ^[1]; Merino, Kyle C. ^[1]; Drummy, Lawrence F. ^[3]; Lee, Sungsik ^[4]; Reinhart, Benjamin ^[4]; Ren, Yang ^[4]; Munro, Catherine J. ^[1]; Pylypenko, Svitlana ^[2];

^[5]; Bedford, Nicholas M. ^[6];

^[1]

Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States, Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, Colorado 80305, United States

It can be difficult to simultaneously control the size, composition, and morphology of metal nanomaterials under benign aqueous conditions. For this, bioinspired approaches have become increasingly popular due to their ability to stabilize a wide array of metal catalysts under ambient conditions. In this regard, we used the R5 peptide as a three-dimensional template for formation of PdPt bimetallic nanomaterials. Monometallic Pd and Pt nanomaterials have been shown to be highly reactive toward a variety of catalytic processes, but by forming bimetallic species, increased catalytic activity may be realized. The optimal metal-to-metal ratio was determined by varying the Pd:Pt ratio to obtain the largest increase in catalytic activity. To better understand the morphology and the local atomic structure of the materials, the bimetallic PdPt nanomaterials were extensively studied by transmission electron microscopy, extended X-ray absorption fine structure spectroscopy, X-ray photoelectron spectroscopy, and pair distribution function analysis. The resulting PdPt materials were determined to form multicomponent nanostructures where the Pt component demonstrated varying degrees of oxidation based upon the Pd:Pt ratio. To test the catalytic reactivity of the materials, olefin hydrogenation was conducted, which indicated a slight catalytic enhancement for the multicomponent materials. Finally, these results suggest a strong correlation between the metal ratio and the stabilizing biotemplate in controlling the final materials morphology, composition, and the interactions between the two metal species.

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Research Organization:: Stony Brook Univ., NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-03ER15476

OSTI ID:: 1344949

Alternate ID(s):: OSTI ID: 1346401

Journal Information:: ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Vol. 9 Journal Issue: 9; ISSN 1944-8244

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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