Nickel Supported on Multilayer Vanadium Carbide for Dry Reforming of Methane

Abstract

A multilayer vanadium carbide MXene (m-V 2 C) was used as a robust oxy-carbide support to prepare a series of Ni/m-V 2 O 3 -V 2 C 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-V 2 C increases with increasing Ni amount. Ni/m-V 2 O 3 -V 2 C with a Ni amount of 13 wt% showed optimal CH 4 and CO 2 conversions of 94 % and 89 %, respectively. In addition, 13Ni/m-V 2 O 3 -V 2 C exhibits excellent catalytic stability and anti-coking ability in a 90-hour stability test, which is attributed to the strong metalsupport interaction. In situ DRIFTS analysis showed that methane activated on the Ni particles generates CH x and H, while CO 2 interacts with m-V 2 O 3 -V 2 C to form carbonates on Ni/ m-V 2 O 3 -V 2 C; carbonate species come into contact with methane pyrolysis products and quickly form formate species, which are further decomposed into CO.

Vanadium Carbide (V2CTx) MXene-Supported Exfoliated g-C3N4 with the Role of Hole Scavenger as a Rapid Electron Transfer Channel for Enhancing Photocatalytic CO2 Reduction to CO and CH4

“…With the V 2 C/ECN composite, the highest CO yield of 12752 μmol g –1 was achieved after 2 h of irradiation time, which is 3.7-fold higher than using the V 2 AlC/ECN composite. Recently, a BET of 0.9 and 2.96 m 2 g –1 were reported for V 2 AlC and V 2 C materials, respectively . In another report, BET specific surface areas of 1.5 and 10.25 m 2 g –1 for V 2 AlC and V 2 C were reported .…”

“…Recently, a BET of 0.9 and 2.96 m 2 g −1 were reported for V 2 AlC and V 2 C materials, respectively. 46 In another report, BET specific surface areas of 1.5 and 10.25 m 2 g −1 for V 2 AlC and V 2 C were reported. 45 This noticeable increment in the CO 2 reduction efficiency for CO evolution with V 2 C MXene was due to exfoliated nanotexture with higher charge transfer separation during the photocatalysis process and larger BET surface area.…”

Synergistic Effect of the V2CTx MXene@V2O5/TiO2 NP Composite for Stimulating Photocatalytic CO2 Reduction through Bireforming of Methanol to Produce CO and CH4

“…Notably, recent reports indicate that V 2 AlC and V 2 C materials possess specific surface areas (BET) of 0.9 and 2.96 m 2 g –1 , respectively. This surface area difference likely contributes to the observed variations in photocatalytic performance, with the higher BET surface area of V 2 C potentially providing more active sites for catalytic reactions, leading to the enhanced CO yield in the composite system . In an alternative study, recorded BET surface areas of 1.5 m 2 g –1 for V 2 AlC and 10.25 m 2 g –1 for V 2 C were reported.…”

“…This surface area difference likely contributes to the observed variations in photocatalytic performance, with the higher BET surface area of V 2 C potentially providing more active sites for catalytic reactions, leading to the enhanced CO yield in the composite system. 55 In an alternative study, recorded BET surface areas of 1.5 m 2 g −1 for V 2 AlC and 10.25 m 2 g −1 for V 2 C were reported. This underscores the variability of surface area measurements, which can be influenced by factors such as sample preparation, measurement techniques, and experimental conditions.…”

Promotional Effects of Mg-Substituted Ni/MgxHAP Catalysts on Carbon Resistance during Dry Reforming of Methane

“…Based on previous work in Ni/CeO 2 , Ni/Al 2 O 3 , and Ni/m-V 2 C, aiming to solve the problem of easy deactivation of Ni/HAP catalysts, a series of stoichiometric Mg-substituted hydroxyapatite (Mg x Ca 10– x (PO 4 ) 6 (OH) 2 ) supports were prepared, loaded with metallic Ni, and used for the DRM reaction in the present work, and the effects of Mg substitution on the catalytic activity and catalytic stability of the Ni/Mg x HAP catalysts in a DRM reaction were studied.…”