Sub‑2 nm Ir Nanoclusters Immobilized on Mesoporous
Nitrogen-Doped Carbons as Efficient Catalysts for Selective Hydrogenation
Posted on 2019-09-20 - 18:04
The
development of high-performance heterogeneous catalysts for
chemoselective hydrogenation reactions is particularly important for
the industrial production of fine-chemical intermediates and biologicals.
Downsizing the active component (usually metals) in heterogeneous
catalysts to the nanocluster scale and even atomic dispersion is highly
desirable for maximizing their efficiency and regulating their selectivity
by optimizing their electronic properties. Herein, we report a nitrogen-tethering
strategy for the synthesis of sub-2 nm Ir nanoclusters supported on
mesoporous nitrogen-doped carbons with high Ir loading up to 10 wt
%. The as-prepared Ir nanocluster catalysts exhibit outstanding activity,
selectivity, and reusability in diverse vital hydrogenation reactions,
including the hydrogenation of nitroarenes, quinoline compounds, and
acetophenone for the synthesis of the corresponding amines, 1,2,3,4-tetrahydroquinolines,
and aromatic alcohols, respectively. The superior performance of the
catalyst is associated with the efficient exposure of the active Ir
surface and the optimal electronic properties of Ir nanoclusters based
on the strong metal–support interaction.
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Chen, Lin-Wei; Tong, Lei; Nan, Hang; Chu, Sheng-Qi; Liang, Hai-Wei (2019). Sub‑2 nm Ir Nanoclusters Immobilized on Mesoporous
Nitrogen-Doped Carbons as Efficient Catalysts for Selective Hydrogenation. ACS Publications. Collection. https://doi.org/10.1021/acsanm.9b01471