Three-dimensional strain dynamics govern the hysteresis in heterogeneous catalysis
| العنوان: | Three-dimensional strain dynamics govern the hysteresis in heterogeneous catalysis |
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| المؤلفون: | Ross Harder, Aline Ribeiro Passos, Amélie Rochet, Florian Meneau, Luiza M. Manente, Wonsuk Cha, Ana F. Suzana |
| المساهمون: | Brazilian Center for Research in Energy and Materials (CNPEM), Universidade Estadual Paulista (Unesp), Argonne National Laboratory |
| المصدر: | Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020) Nature Communications Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| بيانات النشر: | Nature Portfolio, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, Science, General Physics and Astronomy, Nanoparticle, 02 engineering and technology, 010402 general chemistry, Heterogeneous catalysis, 01 natural sciences, Article, General Biochemistry, Genetics and Molecular Biology, Catalysis, Nanomaterials, lcsh:Science, Multidisciplinary, Structural properties, Elastic energy, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Hysteresis, Nanocrystal, Chemical physics, Nanoparticles, Particle, lcsh:Q, 0210 nano-technology |
| الوصف: | Understanding catalysts strain dynamic behaviours is crucial for the development of cost-effective, efficient, stable and long-lasting catalysts. Here, we reveal in situ three-dimensional strain evolution of single gold nanocrystals during a catalytic CO oxidation reaction under operando conditions with coherent X-ray diffractive imaging. We report direct observation of anisotropic strain dynamics at the nanoscale, where identically crystallographically-oriented facets are qualitatively differently affected by strain leading to preferential active sites formation. Interestingly, the single nanoparticle elastic energy landscape, which we map with attojoule precision, depends on heating versus cooling cycles. The hysteresis observed at the single particle level is following the normal/inverse hysteresis loops of the catalytic performances. This approach opens a powerful avenue for studying, at the single particle level, catalytic nanomaterials and deactivation processes under operando conditions that will enable profound insights into nanoscale catalytic mechanisms. Direct visualisation of site-specific strain variations of catalysts is needed to better understand catalytic properties. Here, the authors determine with attojoule precision that the well-known catalytic hysteresis phenomenon occurs at single particle level and involves three-dimensional strain field. |
| اللغة: | English |
| تدمد: | 2041-1723 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e3f43255b98a19b98ccaf3b87e676ac https://doaj.org/article/a771a60a791b4b74b8f8a581da71c4c5 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....5e3f43255b98a19b98ccaf3b87e676ac |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20411723 |
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