Preparation of CuO/ZnO/Nb2O5 catalyst for the water-gas shift reaction

Development of Co–Nb–CeO2 Catalyst for Hydrogen Production from Waste-Derived Synthesis Gas Using Techno-Economic and Environmental Assessment

“…Hence, a catalyst with high reducibility tends to exhibit high activity in the WGS reaction. In this sense, oxygen storage capacity (OSC) is an important factor in the WGS reaction because it is related to reactive oxygen, which accelerates the redox reaction. , CeO 2 is one of the most promising candidates in support of the WGS reaction due to its excellent redox capacity generated by oxygen storage/release from the Ce 3+ and Ce 4+ redox couple. , CeO 2 can also act as the excellent dopant to provide the beneficial interface properties to the reaction. − A Nb promoter has been used in various processes owing to its excellent chemical and thermal stability, which in turn improve catalyst stability. − According to Zhang et al, the Nb promoter increases catalyst stability by improving Au dispersion. , Furthermore, the Nb promoter can enhance catalytic activity in the WGS reaction by providing improved OSC (which originates from structural defects in the CeO 2 support) by replacing Nb 5+ with Ce 4+ . Moreover, Nb suppresses a methanation reaction (3H 2 + CO → CH 4 + H 2 O), which decreases the hydrogen yield in the WGS reaction. , In previous studies, the Nb-promoted Cu–CeO 2 catalyst was investigated in the LWGS reaction .…”

“…34−37 According to Zhang et al, the Nb promoter increases catalyst stability by improving Au dispersion. 38,39 Furthermore, the Nb promoter can enhance catalytic activity in the WGS reaction by providing improved OSC (which originates from structural defects in the CeO 2 support) by replacing Nb 5+ with Ce 4+ . 36 Moreover, Nb suppresses a methanation reaction (3H 2 + CO → CH 4 + H 2 O), which decreases the hydrogen yield in the WGS reaction.…”

Characterization and performance within the WGS reaction of Cu catalysts obtained from hydrotalcites

“…This has led to the study of new materials based on gold [3,26], cerium [24,26], manganese [27], iron [28][29][30][31], nickel [32], as well as the evaluation of catalysts containing molybdenum or yttrium as dopants [33,34], among others. By the same token, catalysts that show activity at intermediate temperatures (MTS) have been studied [35][36][37][38][39][40][41]. Among the materials most studied in recent years in heterogeneous 3 catalysis are the precursors of the hydrotalcite (HTLc) or layered double hydroxides (LDH) type, which can be made up of various metal cations and anions that confer different properties.…”