A Pt/CeO2‐ZrO2 catalytic system was able to initiate an extremely intense hydrogen spillover providing a huge amount of activated hydrogen (12 mol/mol Pt) at temperatures –50°C ‐ +25°C, which was not observed before. The idea was to use this activated hydrogen for reduction of carbonyl compounds under ambient conditions. Thus, the efficient and selective heterogeneous hydrogenation of carbonyl compounds of different structure, including 5‐hydroxymethylfurfural and cinnamaldehyde, to the corresponding alcohols with quantitative yields was successfully performed over the Pt/CeO2‐ZrO2 catalysts at room‐temperature and atmospheric pressure of H2. The proposed catalysts afforded hydrogenation under significantly milder conditions with a much higher activity and selectivity compared to the commercial catalysts and reported catalytic systems. Hydrogenation of the C=O bond in the presence of a C=C bond proceeded with a high regioselectivity.
The
use of available renewable sources of raw materials for the
production of various organic compounds has long been undoubted and
recognized throughout the world. However, the development of efficient
“green” catalytic technologies for the processing of
bioavailable compounds, namely, the synthesis of catalysts and the
selection of optimal process conditions, has become a real challenge
for researchers nowadays. In this work, 2,5-bis(hydroxymethyl)furan,
an intermediate for the production of a number of biobased polymer
materials, was obtained by hydrogenation of 5-hydroxymethylfurfural
in a yield close to quantitative at room temperature and atmospheric
pressure in the presence of a catalytic system with 1% wt of platinum
as an active phase supported on ceria–zirconia mixed oxide.
On the low-loaded 0.25% Pt/CeO2–ZrO2 catalyst,
the yield of the desired alcohol as high as 87% has been achieved
after a slight increase of H2 pressure from 0.1 to 0.5
MPa.
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