Fabrication of Cu-doped cerium oxide nanofibers via electrospinning for preferential CO oxidation

Abstract

A novel Cu-doped cerium oxide nanofibers catalyst was prepared via electrospinning and used for preferential CO oxidation (CO-PROX). The microstructure of as-prepared catalyst was characterized by XRD, BET, XPS, SEM, HRTEM, and H 2 -TPR. The results derived from catalytic reaction showed that the obtained Cu 0.1 Ce 0.9 O 2– x nanofiber is an efficient catalyst for CO-PROX and the concentration of CO in tail gas can be reduced below than 100 ppm. The high catalytic activity of Cu 0.1 Ce 0.9 O 2– x nanofiber is attributed to the high surface areas and the special fiber-like nanostructure with highly dispersed and active Cu 2+ ions. ►A novel Cu-doped cerium oxide nanofibers catalyst has been successfully prepared via electrospinning. ►The Cu-doped cerium oxide nanofibers catalyst has higher surface area, smaller size, and more highly dispersed Cu 2+ ions compared with particle-like one. ►The special fiber-like nanostructure can improve the catalytic performance of CuO–CeO 2 catalysts compared with particle-like catalyst.