Catalysis Communications p. 32 - 37 (2018)
Update date:2022-08-16
Topics:
Virgili, Anike H.
Luza, Leandro
Fernandes, Jesum A.
Costa, Tania M.H.
de Menezes, Eliana W.
Benvenutti, Edilson V.
A self-supported gold/chitosan nanocatalyst was easily obtained by drying a water dispersion followed by powdering it. In this system chitosan acts concomitantly as a stabilizer and support for gold nanoparticles. The self-supported gold/chitosan was applied as catalyst for C[dbnd]C and C[dbnd]O hydrogenation in conjugate and non-conjugate systems. The catalyst showed activity, driving selectivity to saturated alcohols or saturated ketones (selectivities ≥99%) depending on the reducing agent used, NaBH4 or H2 respectively. When H2 was used, the catalyst showed activity only in conjugate C[dbnd]C–C[dbnd]O, forming saturated aldehydes and ketones. For isolated C[dbnd]C, C[dbnd]O or conjugate C[dbnd]C–C[dbnd]C bonds, no activity was observed.
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