Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2411.17276 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866929605814779904 |
|---|---|
| author | Rehman, Abdul van de Kruijs, Robbert W. E. Beld, Wesley T. E. van den Sturm, Jacobus M. Ackermann, Marcelo |
| author_facet | Rehman, Abdul van de Kruijs, Robbert W. E. Beld, Wesley T. E. van den Sturm, Jacobus M. Ackermann, Marcelo |
| contents | Hydrogen, crucial for the green energy transition, poses a challenge due to its tendency to degrade surrounding wall materials. To harness hydrogen's potential, it is essential to identify materials' parameter(s) that modulate hydrogen-material interaction. In a recent publication, we have shown that the reduction (de-nitridation) of transition metal (TM)-nitrides in hydrogen radicals (H*) stops when their work function drops below a threshold limit. In this work, we tailor the work function of a complex TM-oxide by tuning the relative content of its constituent TM-atoms. We show that increasing the fraction of a low work function TM decreases the work function of the complex oxide, thereby decreasing its reducibility (de-oxidation) in H*. This leads to the stabilization of the higher oxidation states of a high work function TM, which otherwise readily reduce in H*. We propose that the work function serves as a tuneable parameter, modulating the interaction of hydrogen with TM compounds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_17276 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Engineering Work Function to Stabilize Metal Oxides in Reactive Hydrogen Rehman, Abdul van de Kruijs, Robbert W. E. Beld, Wesley T. E. van den Sturm, Jacobus M. Ackermann, Marcelo Materials Science Hydrogen, crucial for the green energy transition, poses a challenge due to its tendency to degrade surrounding wall materials. To harness hydrogen's potential, it is essential to identify materials' parameter(s) that modulate hydrogen-material interaction. In a recent publication, we have shown that the reduction (de-nitridation) of transition metal (TM)-nitrides in hydrogen radicals (H*) stops when their work function drops below a threshold limit. In this work, we tailor the work function of a complex TM-oxide by tuning the relative content of its constituent TM-atoms. We show that increasing the fraction of a low work function TM decreases the work function of the complex oxide, thereby decreasing its reducibility (de-oxidation) in H*. This leads to the stabilization of the higher oxidation states of a high work function TM, which otherwise readily reduce in H*. We propose that the work function serves as a tuneable parameter, modulating the interaction of hydrogen with TM compounds. |
| title | Engineering Work Function to Stabilize Metal Oxides in Reactive Hydrogen |
| topic | Materials Science |
| url | https://arxiv.org/abs/2411.17276 |