AI Article Synopsis
- The study emphasizes the need for advanced coatings to protect materials from reactive hydrogen environments as hydrogen becomes increasingly important for sustainability.
- It identifies the work function as a critical factor influencing how transition metal nitrides respond to hydrogen radicals, particularly their reducibility at high temperatures.
- The research suggests that when the work function of a transition metal nitride drops below a certain threshold, the reduction process halts due to hydrogen preferentially binding to metal atoms, thus offering new insights into material stability in hydrogen applications.
Article Abstract
Amidst the growing importance of hydrogen in a sustainable future, it is crucial to develop coatings that can protect hydrogen-sensitive system components in reactive hydrogen environments. However, the prediction of the chemical stability of materials in hydrogen is not fully understood. In this study, we show that the work function is a key parameter determining the reducibility (i.e., denitridation) of transition metal nitrides (TMNs) in hydrogen radicals (H*) at elevated temperatures. We demonstrate that, when the work function of a TMN system drops below a threshold limit (ϕ), its reduction effectively stops. We propose that this is due to the preferential binding of H* to transition metal (TM) atoms rather than N atoms, which makes the formation of volatile species (NH) unfavorable. This finding provides a novel perspective for comprehending the interaction of hydrogen with TM compounds and allows prediction of the chemical stability of hydrogen-protective coatings.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11587081 | PMC |
| http://dx.doi.org/10.1021/acs.jpclett.4c02259 | DOI Listing |
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