Synthesis of supported bimetallic nanoparticles with controlled size and composition distributions for active site elucidation

Hakim, Sikander H.; Sener, Canan; Alba Rubio, Ana C.; Gostanian, Thomas M.; O'neill, Brandon J; Ribeiro, Fabio H.; Miller, Jeffrey T.; Dumesic, James A

doi:10.1016/j.jcat.2014.12.015

Synthesis of supported bimetallic nanoparticles with controlled size and composition distributions for active site elucidation

Journal Article · Sat Aug 01 04:00:00 EDT 2015 · Journal of Catalysis

DOI:https://doi.org/10.1016/j.jcat.2014.12.015· OSTI ID:1237705

Hakim, Sikander H.; Sener, Canan; Alba Rubio, Ana C.; Gostanian, Thomas M.; O'neill, Brandon J; Ribeiro, Fabio H.; Miller, Jeffrey T.; Dumesic, James A

Elucidation of active sites in supported bimetallic catalysts is complicated by the high level of dispersity in the nanoparticle size and composition that is inherent in conventional methods of catalyst preparation. We present a synthesis strategy that leads to highly dispersed, bimetallic nanoparticles with uniform particle size and composition by means of controlled surface reactions. We demonstrate the synthesis of three systems, RhMo, PtMo, and RhRe, consisting of a highly reducible metal with an oxophilic promoter. These catalysts are characterized by FTIR, CO chemisorption, STEM/EDS, TPR, and XAS analysis. The catalytic properties of these bimetallic nanoparticles were probed for the selective CO hydrogenolysis of (hydroxymethyl)tetrahydropyran to produce 1,6 hexanediol. Based on the characterization results and reactivity trends, the active sites in the hydrogenolysis reaction are identified to be small ensembles of the more noble metal (Rh, Pt) adjacent to highly reduced moieties of the more oxophilic metal (Mo, Re).

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Institute for Atom-efficient Chemical Transformations (IACT); Argonne National Laboratory (ANL)

Sponsoring Organization:: USDOE Office of Science - Office of Basic Energy Sciences; USDOE Energy Frontier Research Center - Institute for Atom-Efficient Chemical Transformation

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1237705

Journal Information:: Journal of Catalysis, Journal Name: Journal of Catalysis Vol. 328; ISSN 0021-9517

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

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Synthesis of supported bimetallic nanoparticles with controlled size and composition distributions for active site elucidation

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