Ordered mesoporous alumina-supported bimetallic Pd–Ni catalysts for methane dry reforming reaction

Abstract

To compare the influence of Pd addition to Ni supported on ordered mesoporous alumina catalyst, prepared highly ordered mesoporous alumina (MA) was used as catalyst support for methane dry reforming under atmospheric pressure. Ni and Pd were impregnated on this support to obtain both monometallic and/or bimetallic catalysts, respectively. The fresh and spent catalysts were characterized by N₂ physical adsorption, high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), H₂-temperature-programmed reduction (H₂-TPR), laser Raman spectroscopy and temperature-programmed hydrogenation (TPH). The XRD and HRTEM analysis results showed that Ni–Pd nanoalloy was formed after H₂ reduction. The catalytic performance analysis results indicated that the bimetallic nanoalloy catalysts showed higher activity than the monometallic catalyst. The deposition of carbon during the reaction was analyzed. The results indicated that different supported metal species led to different carbon species which influenced catalytic performance.