AI Article Synopsis
- New nanoporous materials, especially those with adaptive cavities, show great potential in improving adsorption and separation processes, with unique behaviors like negative gas adsorption (NGA).
- Although the underlying thermodynamics of these unusual adsorption behaviors have been explored, many experimental results still lack clear explanations, indicating a need for deeper analysis.
- The study's development of a comprehensive thermodynamic landscape for methane adsorption on DUT-49 successfully explains observed structural changes and behaviors, offering valuable insights that could reshape our understanding of gas adsorption in various materials.
Article Abstract
New nanoporous materials have the ability to revolutionize adsorption and separation processes. In particular, materials with adaptive cavities have high selectivity and may display previously undiscovered phenomena, such as negative gas adsorption (NGA), in which gas is released from the framework upon an increase in pressure. Although the thermodynamic driving force behind this and many other counterintuitive adsorption phenomena have been thoroughly investigated in recent years, several experimental observations remain difficult to explain. This necessitates a comprehensive analysis of gas adsorption akin to the conformational free energy landscapes used to understand the function of proteins. We have constructed the complete thermodynamic landscape of methane adsorption on DUT-49. Traversing this complex landscape reproduces the experimentally observed structural transitions, temperature dependence, and the hysteresis between adsorption and desorption. The complete thermodynamic description presented here provides unparalleled insight into adsorption and provides a framework to understand other adsorbents that challenge our preconceptions.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9115754 | PMC |
| http://dx.doi.org/10.1021/jacs.1c00522 | DOI Listing |
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