Issue 44, 2022

Establishing tungsten carbides as active catalysts for CO2 hydrogenation

Abstract

Molybdenum carbides are promising catalysts for the reverse water–gas shift (RWGS) reaction, and we aim to understand if similar performance can be observed across the library of transition metal carbides. Although tungsten and molybdenum carbides exhibit similar catalytic properties for hydrogenation reactions, tungsten carbide has not been thoroughly evaluated for CO2 hydrogenation. We hypothesize that the extreme synthesis conditions necessary for carburizing tungsten can cause sintering, agglomeration, and carbon deposition, leading to difficulty evaluating the intrinsic activity of tungsten carbides. In this work, tungsten is encapsulated in silica to preserve particle size and demonstrate correlations between the active phase composition and RWGS performance.

Graphical abstract: Establishing tungsten carbides as active catalysts for CO2 hydrogenation

Supplementary files

Article information

Article type
Paper
Submitted
15 juin 2022
Accepted
19 oct. 2022
First published
19 oct. 2022

Nanoscale, 2022,14, 16458-16466

Author version available

Establishing tungsten carbides as active catalysts for CO2 hydrogenation

M. Juneau, D. Yaffe, R. Liu, J. N. Agwara and M. D. Porosoff, Nanoscale, 2022, 14, 16458 DOI: 10.1039/D2NR03281C

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