Ni/Co in and on CeO₂: a comparative study on the dry reforming reaction

Abstract

Sketch for the mechanism on the basis of transient studies of methane decomposition and the CO2 reaction with deposited carbon after CH4 decomposition on Co-substituted CeO2.

Research Progress on Stability Control on Ni-Based Catalysts for Methane Dry Reforming

“…Recent studies show that Co-substituted CeO 2 is more stable than Ni-substituted CeO 2 under the DRM reaction conditions at 800 • C. Surface lattice oxygen reactivity plays a vital role in catalytic stability. The vacancy formation is favored in Co-substituted CeO 2 as compared to Ni-substituted CeO 2 , leading to a higher availability of surface oxygen in Co-substituted catalyst than Ni-substituted CeO 2 for the reaction [68].…”

Materials Enabling Methane and Toluene Gas Treatment

“…The energy required to generate vacancies in cobalt-substituted CeO 2 is much lower compared to nickel-substituted CeO 2 . It can therefore be confirmed that while nickel inhibits oxidation by decreasing the availability of surface oxygen required for the reaction, Co-substituted catalysts promote oxidation by increasing the availability of surface oxygen [26]. Density functional theory was utilized by Bandurist and Pichugina to simulate the methane dryreforming process, which involves the breakdown of C-H bonds on Cu-rich Ni-Cu clusters.…”