Nickel Supported on Multilayer Vanadium Carbide for Dry Reforming of Methane

Abstract

AbstractA multilayer vanadium carbide MXene (m‐V2C) was used as a robust oxy‐carbide support to prepare a series of Ni/m‐V2O3‐V2C catalysts with various Ni amounts by an impregnation method and used for dry reforming of methane (DRM). The results show that the Ni addition increases the catalyst alkalinity, and the interaction between the Ni metal and m‐V2C increases with increasing Ni amount. Ni/m‐V2O3‐V2C with a Ni amount of 13 wt% showed optimal CH4 and CO2 conversions of 94 % and 89 %, respectively. In addition, 13Ni/m‐V2O3‐V2C exhibits excellent catalytic stability and anti‐coking ability in a 90‐hour stability test, which is attributed to the strong metal‐support interaction. In situ DRIFTS analysis showed that methane activated on the Ni particles generates CHx and H, while CO2 interacts with m‐V2O3‐V2C to form carbonates on Ni/m‐V2O3‐V2C; carbonate species come into contact with methane pyrolysis products and quickly form formate species, which are further decomposed into CO.