To improve the interfacial contact of Pdo and CexOy, a novel nanotube PdO/CexOy with coaxial structure was designed and synthesized through combining electrospinning with carbonization. The structure and component of the composites were characterized using FT-IR, XRD, XPS, BET, TGA, TEM, FE-SEM, EIS and ICP techniques. The catalytic performance of ligand-free PdO-CexOy composite nanocatalyst was evaluated for Suzuki coupling reaction, and it exhibited excellent catalytic activity under mild aerobic conditions without using toxic solvents and inert protective atmosphere, achieving green catalysis. (C) 2018 Elsevier Inc. All rights reserved.