Novel highly efficient alumina-supported cobalt nitride catalyst for preferential CO oxidation at high temperatures

• Published in: International journal of hydrogen energy 2011-02, Vol.36 (3), p.1955-1959
• Main Authors: Yao, Zhiwei, Zhang, Xiaohong, Peng, Feng, Yu, Hao, Wang, Hongjuan, Yang, Jian
• Format: Article
• Language: English
• Subjects: Alternative fuels. Production and utilization; Alumina-supported cobalt nitride; Applied sciences; Carbon monoxide; Catalysts; Co loading; Cobalt; Energy; Exact sciences and technology; Fuels; H2-rich stream; Hydrogen; Nitrides; Oxidation; Oxides; Precursors; Preferential CO oxidation; X-ray photoelectron spectroscopy
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2010.11.082

Novel alumina-supported cobalt nitride catalysts with Co loading ranging from 1 to 10 wt% prepared by NH3-temperature-programmed reaction were investigated as potential catalysts for preferential CO oxidation (PROX) in excess H2 at high temperatures. The formation of the Co4N phase was confirmed by a combination of XRD and XPS, and the Co 2p binding energies of Co4N reported previously were corrected to 798.2 ± 0.2 and 782.5 ± 0.2 eV. We observed that the catalytic activities of these nitrided Co/γ-Al2O3 catalysts were greatly related to their Co loadings. The nitrided 3 wt% Co/γ-Al2O3 catalyst showed the best PROX performance in temperature range of 200–220 °C, which was quite different from Co oxide precursor but was similar to Pt-group metals. [Display omitted] ► Novel alumina-supported Co nitride catalysts are prepared by ammonolysis reaction. ► The nitrided 3 wt% Co/γ-Al2O3 catalyst shows excellent PROX performance at 200 °C ► The catalytic behavior of Co nitirde/γ-Al2O3 is similar to that of Pt-group metals.