Co decorated low Pt loading nanoparticles over TiO2 catalyst for selective hydrogenation of furfural

Selective hydrogenation of carbonyl groups in biobased chemicals to alcohols is crucial to the economics of broadly sustainable product portfolios. Furfuryl alcohol (FOL), the most prominent chemical of hemicellulose, has been produced by furfural (FAL) hydrogenation over heterogeneous catalysts. In this work, we show the outstanding activity, selectivity, and stability of supported bimetallic PtCo nanoparticle (np) synthesized from a pre-made stock solution of zero valent atomic Pt precursor and Co-2(CO)8. With only 0.5 wt% Pt on TiO2, the np-PtCo/TiO2 catalyst exhibits TOF of 14,023 h-1 at 30 ? with > 99.9% FOL selectivity. The stability of the np-PtCo/TiO2 catalyst is verified by the steady performance in reuses at both moderate and full conversions. The oxyphilic Co delta+ in the PtCo nanoparticles induces nucleophilic chemisorption of-C--O, resulting in deeply polarized -C--O bond. DFT calculated FAL adsorption energies on np-Pt and np-PtCo are -0.22 eV and -0.74 eV, respectively.

Automated summary

This study demonstrates the outstanding activity, selectivity, and stability of supported bimetallic PtCo nanoparticles in the hydrogenation of furfural to furfuryl alcohol. The np-PtCo/TiO2 catalyst exhibits high FOL selectivity and TOF values at low Pt loading. Moreover, the oxyphilic Co delta+ in the PtCo nanoparticles induces highly polarized -C--O bond.