Nanosized Pd-Au bimetallic phases on carbon nanotubes for selective phenylacetylene hydrogenation.
نویسندگان
چکیده
Palladium (Pd)-catalyzed selective hydrogenation of alkynes has been one of the most studied hydrogenation reactions in the last century. However, kinetic studies conducted to reveal the catalyst's active centers have been hindered because of dynamic surface changes on Pd during the reaction. In the present study, bimetallic Pd-Au nanoparticles supported on carbon nanotubes have been synthesized at room temperature as catalysts for selective hydrogenation of phenylacetylene, which show effectively enhanced selectivity compared to their monometallic counterparts. Structural and surface analyses of fresh and reacted catalysts reveal that selective hydrogenation of phenylacetylene is favored over nanosized Pd-Au bimetallic phases due to modifications in the Pd surface in terms of neighboring site isolation and electron density reduction.
منابع مشابه
Carbon Nanotubes as Supports for Palladium and Bimetallic Catalysts for Use in Hydrogenation Reactions
School of Chemistry, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa Email: ‡[email protected]; *[email protected] Carbon nanotubes (CNTs) possess unique properties which make them competitive with conventional catalyst supports. This short review collates fi ndings from many research groups on the benefi ts of palladium/carbon nanotubes in hydrogenat...
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ورودعنوان ژورنال:
- Physical chemistry chemical physics : PCCP
دوره 19 8 شماره
صفحات -
تاریخ انتشار 2017