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The present work presents a new nanocomposite catalyst with rhenium nanostructures (ReNSs) for the catalytic hydrogenation of 4-nitrophenol and 4-nitroaniline. The catalyst, based on an anion exchange resin with functionality derived from 1,1′-carboimidazole, was obtained in the process involving anion exchange of ReO 4  –  ions followed by their reduction with NaBH 4 . The amino functionality present in the resin played a primary role in the stabilization of the resultant ReNSs, consisting of ≈1% ( w/w ) Re in the polymer mass. The synthesized and capped ReNSs were amorphous and had the average size of 3.45 ± 1.85 nm. Then, the obtained catalyst was used in a catalytic reduction of 4-nitrophenol (4-NP) and 4-nitroaniline (4-NA). Following the pseudo-first-order kinetics, 5 mg of the catalyst led to a 90% conversion of 4-NP with the mass-normalized rate constant (k m1 ) of 6.94 × 10 −3  min −1  mg −1 , while the corresponding value acquired for 4-NA was 7.2 × 10 −3  min −1  mg −1 , despite the trace amount of Re in the heterogenous catalyst. The obtained material was also conveniently reused.

Rhenium Nanostructures Loaded into Amino-Functionalized Resin as a Nanocomposite Catalyst for Hydrogenation of 4-Nitrophenol and 4-Nitroaniline