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Updated: Aug 22, 2026

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
Published on: June 24, 2022
Synergistic Tri-Metallic Heterogeneous Nanocatalyst for Ligand-Free Oxidative Homocoupling of Terminal Alkynes
Dibyashree Dolakasharia1, Rashmi Chetry2, Diksha J Baruah3
1Department of Chemical Sciences, Tezpur University, Tezpur, Assam, India.
None:
Herein, we report the synthesis of a carbon-supported palladium-based tri-metallic nanocatalyst (cat-G) and its successful application to facilitate the oxidative homocoupling of aromatic and aliphatic terminal alkynes. The catalyst contains significantly less amount of total metal content (20%) and was characterized using x-ray photoelectron and energy-dispersive x-ray spectroscopies, x-ray diffraction, thermogravimetric analysis, and transmission electron microscopy. Our implementation of EtOH as a solvent medium along with minimal catalyst loading for the synthesis of symmetrical 1,3-diynes under aerial oxidation without the aid of any ligand unveils simple and milder reaction conditions for C(sp)-C(sp) coupling reactions. The protocol displays a broad substrate scope, and the catalyst possesses simple recovery along with moderate recyclability up to five catalytic cycles.
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