Promoting electron transfer of surface oxygen vacancies in Pd/CeO2-RE via doping engineering for enhancing catalytic activity in Suzuki coupling reaction

•Coaxial double-nanotubular RE-doping Pd/CeO2 are prepared by a facile electrospinning method.•The surface oxygen vacancies of the catalysts can be regulated by doping engineering.•An electron pathway from surface oxygen vacancies to nearby Pd nanoparticles is proposed.•Through doping, the increase of surface area and conductivity play a synergistic catalytic role.