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First-Principles Study of the Effect of Titanium Doping on Carbon Monoxide Poisoning Properties of Zirconium-Cobalt Alloys
| Content Provider | MDPI |
|---|---|
| Author | Zhao, Shixiang Zeng, Xiangguo Wang, Yuntian Luo, Bosang Wang, Fang |
| Copyright Year | 2022 |
| Description | It is very important to study impurity gas poisoning in ZrCo alloy because it is associated directly with the performance of ZrCo alloy as a hydrogen storage material. In this work, the effects of atomic replacement on the mechanism and properties of CO impurity gas poisoning in doped (Ti) ZrCo hydrogen storage alloys were investigated using the first principles method, based on the pseudopotential plane wave method. The adsorption energy, lattice constant, density of states, and charge density difference of the compounds before and after doping were calculated. Then, surface adsorption models of the ZrCo and $Zr_{0.8}Ti_{0.2}$Co alloys were established with the assistance of a conventional model. The resulting adsorption energy values of the clean surface and the surface adsorption energy values in the presence of CO impurity gases manifested that the Ti element-doped $Zr_{0.8}Ti_{0.2}$Co alloy was more susceptible to CO gas poisoning compared to ZrCo, which was consistent with the existing experimental results. In addition, by analyzing the conventional model, the electrons from the doped atoms overlapped with the surrounding electrons of C atoms, the phenomenon of orbital hybridization occurred, and the interactions increased. Consequently, Ti doping was not conducive to ZrCo to improve the ability to resist CO poisoning. The research results of this paper have laid a good foundation for the study of the effect of Ti doping on the antitoxicity performance. |
| Starting Page | 1015 |
| e-ISSN | 20734352 |
| DOI | 10.3390/cryst12081015 |
| Journal | Crystals |
| Issue Number | 8 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-22 |
| Access Restriction | Open |
| Subject Keyword | Crystals Industrial Engineering Zrco Alloy Elemental Doping Co Poisoning First Principles |
| Content Type | Text |
| Resource Type | Article |
