Atomically Dispersed Reduced Graphene Aerogel-Supported Iridium Catalyst with an Iridium Loading of 14.8 wt %

Babucci, Melike; Sarac Oztuna, F. Eylul; Debefve, Louise M.; Boubnov, Alexey; Bare, Simon R.; Gates, Bruce C.; Unal, Ugur; Uzun, Alper

doi:10.1021/acscatal.9b02231

Title: Atomically Dispersed Reduced Graphene Aerogel-Supported Iridium Catalyst with an Iridium Loading of 14.8 wt %

Journal Article · 30 July 2019 · ACS Catalysis

DOI: https://doi.org/10.1021/acscatal.9b02231 · OSTI ID:1598414

Babucci, Melike ^[1];

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^[2]; Boubnov, Alexey ^[3]; Bare, Simon R. ^[3];

^[2];

^[1];

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Koç Univ., Istanbul (Turkey)
Univ. of California, Davis, CA (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)

Atomically dispersed iridium complexes were anchored on a reduced graphene aerogel (rGA) by the reaction of Ir(CO)₂(acac) [acac = acetonylacetonato] with oxygen-containing groups on the rGA. Characterization by X-ray absorption, infrared, and X-ray photoelectron spectroscopies and atomic resolution aberration-corrected scanning transmission electron microscopy demonstrates atomically dispersed iridium, at the remarkably high loading of 14.8 wt %. The rGA support offers sites for metal bonding comparable to those of metal oxides, but with the advantages of high density and a relatively high degree of uniformity, as indicated by the same turnover frequencies for catalytic hydrogenation of ethylene at low and high iridium loadings. We note the atomic dispersion at a high metal loading—and the high density of catalytic sites per unit of reactor volume, a key criterion for practical catalysts—set this catalyst apart from those reported.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: Scientific and Technological Research Council of Turkey (TUBITAK); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division

Grant/Contract Number:: AC02-76SF00515; FG02-04ER15513

OSTI ID:: 1598414

Journal Information:: ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 11 Vol. 9; ISSN 2155-5435

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
atomic dispersion
catalyst
graphene
high metal loading
iridium
noble metal
single-site

Title: Atomically Dispersed Reduced Graphene Aerogel-Supported Iridium Catalyst with an Iridium Loading of 14.8 wt %

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