In situ structural study of manganese and iron oxide promoted rhodium catalysts for oxygenate synthesis

Carrillo, Pamela; Shi, Rui; Senanayake, Sanjaya D.; White, Michael G.

doi:10.1016/j.apcata.2020.117845

Title: In situ structural study of manganese and iron oxide promoted rhodium catalysts for oxygenate synthesis

Journal Article · Wed Sep 23 00:00:00 EDT 2020 · Applied Catalysis. A, General

DOI:https://doi.org/10.1016/j.apcata.2020.117845· OSTI ID:1670667

Carrillo, Pamela ^[1]; Shi, Rui ^[1];

^[2];

^[3]

Stony Brook Univ., NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

In situ x-ray diffraction (XRD) and absorption spectroscopy (XAS) was used in this study to characterize the structure and phase composition of a novel Mn and Fe double-promoted Rh-based catalyst for CO hydrogenation to oxygenates. Catalysts with different Mn:Rh molar ratios were prepared by combining Mn and Rh precursors with Fe₂O₃ powder, which were then calcined in air and reduced under hydrogen. The resulting MnRh/Fe₂O₃ catalysts are found to be highly selective for ethanol synthesis (~40 %) for CO hydrogenation under mild conditions (~1 bar, 240 °C). Comparison of the reactivity results with quantitative phase information from in situ XRD measurements suggest that reduced metal oxides, MnO and FeOx, and metallic Rh co-exist as active phases to promote oxygenate selectivity. The results of this work also highlight the importance of in situ characterization for extracting meaningful information on the active phases of such complex, ternary catalysts which can vary under reaction conditions.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division

Grant/Contract Number:: SC0012704

OSTI ID:: 1670667

Alternate ID(s):: OSTI ID: 1669722

Report Number(s):: BNL-219918-2020-JAAM

Journal Information:: Applied Catalysis. A, General, Vol. 608; ISSN 0926-860X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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In situ characterization
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Title: In situ structural study of manganese and iron oxide promoted rhodium catalysts for oxygenate synthesis

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