2D Transition Metal Carbides (MXenes) for Carbon Capture

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Global warming caused by burning of fossil fuels is indisputably one of mankind‘s greatest challenges in the 21st century. To reduce the ever‐increasing CO2 emissions released into the atmosphere, dry solid adsorbents with large surface‐to‐volume ratio such as carbonaceous materials, zeolites, and metal–organic frameworks have emerged as promising material candidates for capturing CO2. However, challenges remain because of limited CO2/N2 selectivity and long‐term stability. The effective adsorption of CO2 gas (≈12 mol kg−1) on individual sheets of 2D transition metal carbides (referred to as MXenes) is reported here. It is shown that exposure to N2 gas results in no adsorption, consistent with first‐principles calculations. The adsorption efficiency combined with the CO2/N2 selectivity, together with a chemical and thermal stability, identifies the archetype Ti3C2 MXene as a new material for carbon capture (CC) applications.

Ingemar Persson, Joseph Halim, Hans Lind, Thomas W. Hansen, Jakob B. Wagner, Lars-Åke Näslund, Vanya Darakchieva, Justinas Palisaitis, Johanna Rosen, Per O. Å. Persson[J], Advanced Materials, 2018.

DOI: 10.1002/adma.201805472

https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201805472