Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 29, Pages 8319-8323Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201602801
Keywords
four-fold hollow sites; heterogeneous catalysis; hydrogenation; phosphomolybdic acid; single-atom catalysts
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Funding
- National University of Singapore [WBS: R-279-000-464-133]
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In coordination chemistry, catalytically active metal complexes in a zero-or low-valent state often adopt four-coordinate square-planar or tetrahedral geometry. By applying this principle, we have developed a stable Pt-1 single-atom catalyst with a high Pt loading (close to 1 wt%) on phosphomolybdic acid(PMA)-modified active carbon. This was achieved by anchoring Pt on the four-fold hollow sites on PMA. Each Pt atom is stabilized by four oxygen atoms in a distorted square-planar geometry, with Pt slightly protruding from the oxygen planar surface. Pt is positively charged, absorbs hydrogen easily, and exhibits excellent performance in the hydrogenation of nitrobenzene and cyclohexanone. It is likely that the system described here can be extended to a number of stable SACs with superior catalytic activities.
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