التفاصيل البيبلوغرافية
| العنوان: |
Investigation of Local Structure and Enhanced Thermal Stability of Ir-Doped PdRu Nanoparticles for Three-Way Catalytic Applications |
| المؤلفون: |
Akhil Tayal (10655025), Okkyun Seo (2819179), Jaemyung Kim (1277460), Kohei Kusada (1850680), Hiroshi Kitagawa (190936), Osami Sakata (1455958) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Medicine, Cell Biology, Geology, Cancer, Space Science, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, way catalytic applications, studied using x, newly synthesized pdruir, dynamical fluctuation suppresses, distinct local surroundings, centered cubic structure, xafs analysis revealed, doped pdru nanoparticles, investigated using temperature, enhanced thermal stability, 4 , 2 , edge xafs reveals, pdru alloy nanoparticles, pure ru nps, thermal stability, local structure, situ <, pdruir nps, edge features, dynamical fluctuations, thereby leading |
| الوصف: |
The local structure and thermal stability of newly synthesized PdRuIr and PdRu alloy nanoparticles (NPs) were studied using X-ray absorption fine structure spectroscopy (XAFS) and compared with those of Ru NPs. Pd K-edge XAFS reveals that a significant fraction of Pd segregates, forming metal NP clusters. In the PdRuIr NPs, a small fraction of Pd forms an alloy with Ir, whereas a majority phase is Ru–Ir alloy having the novel face-centered cubic structure. Apart from the distinct local surroundings, XAFS analysis revealed the presence of an anharmonic disorder in the PdRu and PdRuIr NPs. The previously observed enhanced thermal stability with Pd and Ir doping was investigated using temperature-dependent in situ XAFS. In the Ru NPs, an abrupt change in the near-edge features was observed at 673 K, which was gradually suppressed for PdRu and PdRuIr NPs. At this temperature, the dynamical fluctuations were more pronounced in the pure Ru NPs, helping to convert surface-adsorbed O 2 into the volatile RuO 4 phase, thereby leading to earlier evaporation of Ru. Dynamical fluctuation suppresses with alloying elements or gets extended to a higher temperature, helping to delay the RuO 4 formation process and enhancing the thermal stability of the PdRu and PdRuIr NPs in increasing order. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Investigation_of_Local_Structure_and_Enhanced_Thermal_Stability_of_Ir-Doped_PdRu_Nanoparticles_for_Three-Way_Catalytic_Applications/16597958 |
| DOI: |
10.1021/acs.jpcc.1c05929.s001 |
| الاتاحة: |
https://doi.org/10.1021/acs.jpcc.1c05929.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.73B73BFF |
| قاعدة البيانات: |
BASE |