Journal
CHEMICAL COMMUNICATIONS
Volume 57, Issue 46, Pages 5670-5673Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cc00923k
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Funding
- National Key Research and Development Program of China [2016YFB0901600]
- NSF of China [21905292, 21872166]
- Shanghai Science and Technology Innovation Action Plan [20dz1204400]
- Key Research Program of Chinese Academy of Sciences [KGZD-EW-T06, QYZDJ-SSW-JSC013]
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This study demonstrates a method for optimizing the conversion and selectivity of noble metal-based catalysts in the semi-hydrogenation reaction by dispersing Pd and Ru in an amorphous zirconium hydrogen phosphate matrix. The highly diluted noble metals can act as dual single-atom sites in oxides, with both conversion and selectivity exceeding 90%. In situ DRIFT-IR results show the rapid generation of surface hydroxyl groups, indicating the high efficiency of the single-atom sites in dissociating bound H-2. This work provides a scalable approach for producing cost-effective single-atom catalysts extendable to various oxide matrices.
Optimizing the active sites to balance the conversion and selectivity of the target reaction has long been a challenging quest in developing noble metal-based catalysts. By dispersing Pd and Ru in an amorphous zirconium hydrogen phosphate matrix cross-linked by ionic inorganic oligomers, highly diluted noble metal (<0.2 mol%) can be utilized as dual single-atom sites in oxides for the semi-hydrogenation of phenylacetylene with optimized conversion and selectivity (both >90%) to styrene. In situ DRIFT-IR results suggested the fast generation of surface hydroxyl groups during the catalytic reaction, indicating the high efficiency of the single-atom sites to dissociate bound H-2. This work provides an easily scaled-up method for the production of cost-effective single-atom catalysts extendable to various oxide matrices.
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