Thermoplasmonic-induced energy-efficient catalytic oxidation of glycerol over gold supported catalysts using visible light at ambient temperature
Applied Catalysis A: General
In this work, we highlight the feasibility of new efficient catalytic processes by laser excitation, exemplified inthe reaction of oxidation of glycerol over catalysts based on supported gold nanoparticles. We show that thiscatalytic oxidation reaction can efficiently proceed via laser excitation of surface plasmon resonance of goldnanoparticles, inducing local thermal heating effect. While the reaction did not occur in the absence of anyexternal heat source, with this original approach, 88% of glycerol was converted after 2 h, leading to the for-mation of glyceric acid and tartronic acid as main products. The photonic activation led to 2.5 times moreefficient conversion than an equivalent thermal activation by conventional heating source. Investigations of thelaser power and the nature of support catalyst revealed a significant contribution of electron transfer fromplasmonic nanoparticles to TiO2in the oxidation reaction.