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Supported Nanostructured MoxC Materials for the Catalytic Reduction of CO2 through the Reverse Water Gas Shift Reaction.

ABSTRACT: MoxC-based catalysts supported on γ-Al2O3, SiO2 and TiO2 were prepared, characterized and studied in the reverse water gas shift (RWGS) at 548-673 K and atmospheric pressure, using CO2:H2 = 1:1 and CO2:H2 = 1:3 mol/mol reactant mixtures. The support used determined the crystalline MoxC phases obtained and the behavior of the supported nanostructured MoxC catalysts in the RWGS. All catalysts were active in the RWGS reaction under the experimental conditions used; CO productivity per mol of Mo was always higher than that of unsupported Mo2C prepared using a similar method in the absence of support. The CO selectivity at 673 K was above 94% for all the supported catalysts, and near 99% for the SiO2-supported. The MoxC/SiO2 catalyst, which contains a mixture of hexagonal Mo2C and cubic MoC phases, exhibited the best performance for CO production.

SUBMITTER: Pajares A 

PROVIDER: S-EPMC9506042 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature

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Supported Nanostructured Mo<sub>x</sub>C Materials for the Catalytic Reduction of CO<sub>2</sub> through the Reverse Water Gas Shift Reaction.

Pajares Arturo A   Liu Xianyun X   Busacker Joan R JR   Ramírez de la Piscina Pilar P   Homs Narcís N  

Nanomaterials (Basel, Switzerland) 20220913 18

Mo<sub>x</sub>C-based catalysts supported on γ-Al<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub> and TiO<sub>2</sub> were prepared, characterized and studied in the reverse water gas shift (RWGS) at 548-673 K and atmospheric pressure, using CO<sub>2</sub>:H<sub>2</sub> = 1:1 and CO<sub>2</sub>:H<sub>2</sub> = 1:3 mol/mol reactant mixtures. The support used determined the crystalline Mo<sub>x</sub>C phases obtained and the behavior of the supported nanostructured Mo<sub>x</sub>C catalysts in the RWGS.  ...[more]

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