Sustainable Aviation Fuel Production Under Mild Conditions Enabled by Photothermal High‐Entropy Alloy Catalyst

ABSTRACT Sustainable aviation fuels derived from biomass offer a renewable alternative to fossil‐based jet fuel. However, conventional production processes are often hindered by harsh operating conditions, which increase energy consumption and overall costs. In this study, a novel PtPdBiNiZn/TiO 2 high‐entropy alloy (HEA) catalyst was prepared via a rapid and facile multi‐step one‐pot reaction system under mild conditions for the photothermally driven hydrodeoxygenation of oleic acid to produce bio‐aviation fuel. The prepared catalyst promotes hydrogen spillover and oxygen vacanciesgeneration. AC‐HAADF‐STEM and XAS identified the presence of an alloy structure. Under mild conditions with 120°C and hydrogen pressure of 0.6 MPa, the catalyst achieved a selectivity of 93.2% for C 8 ∼ C 17 alkanes, exceeding that of previously reported Pt‐based systems under the same reaction conditions. DFT calculations revealed that Ovs on the TiO 2 preferentially adsorb H 2 (−0.39 eV) and propionic acid (−2.20 eV), confirming the key role of Ovs in the HDO mechanism. These mild conditions significantly reduce the energy consumption of the reaction, offering a new approach for producing sustainable aviation fuels.