Journal Article

PUBDB-2025-01674

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Bimetallic Mn$_x$Ru$_{100–x}$ Nanoparticles on Supported Ionic Liquid Phases (Mn$_x$Ru$_{100–x}$ @SILP) as Tunable Hydrogenation Catalysts

Zenner, J.Extern* ; Kang, L.Extern* ; Antil, N. ; Johny, J. ; DeBeer, S.Extern* ; Leitner, W. (Corresponding author) ; Bordet, A. (Corresponding author)Extern*

2025
ACS Washington, DC

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Please use a persistent id in citations: doi:10.1021/acscatal.4c05494  doi:10.3204/PUBDB-2025-01674

Abstract: Bimetallic manganese–ruthenium nanoparticles of defined Mn:Ru ratios were prepared on an imidazolium-based supported ionic liquid phase. Characterization of the resulting Mn$_x$Ru$_{100–x}$@SILP materials by electron microscopy evidenced the formation of small (1.3–3.6 nm) and well-dispersed nanoparticles (NPs) containing Mn and Ru in the expected ratios. X-ray absorption spectroscopy (XAS) studies revealed that no significant levels of alloying occurred in these NPs that contain mainly oxidized Mn species and metallic Ru, consistent with the immiscibility of the two metals and the high oxophilicity of Mn. The hydrogenation performance of Mn$_x$Ru$_{100–x}$@SILP materials was probed using benzylideneacetone as model substrate containing three distinct reducible moieties. Albeit the two metals are present in distinct phases, the Mn:Ru ratio was found to have a strong impact on activity and selectivity with trends similar to what was previously reported for alloyed Fe$_x$Ru$_{100–x}$@SILP and Co$_x$Ru$_{100–x}$@SILP catalysts. In particular, a sharp switch of 6-membered aromatic ring hydrogenation between Mn$_{15}$Ru$_{85}$ (full ring hydrogenation) and Mn$_{25}$Ru$_{75}$ (no ring hydrogenation) was observed. These results demonstrate that alloying is not a requirement to observe synergistic effects from the combination of 3d metals and noble metals in NPs, opening new opportunities for the development of bimetallic catalysts for selective hydrogenation.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. DFG project G:(GEPRIS)390919832 - EXC 2186: Das Fuel Science Center – Adaptive Umwandlungssysteme für erneuerbare Energie- und Kohlenstoffquellen (390919832) (390919832)
3. FS-Proposal: I-20211319 (I-20211319) (I-20211319)
4. FS-Proposal: I-20230324 (I-20230324) (I-20230324)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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