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Relating Rates of Catalyst Sintering to the Disappearance of Individual Nanoparticles during Ostwald Ripening
Abstract
Sintering of nanoparticles (NPs) of Ni supported on MgAl(2)O(4) was monitored in situ using transmission electron microscopy (TEM) during exposure to an equimolar mixture of H(2) and H(2)O at a pressure of 3.6 mbar at 750 °C, conditions relevant to methane steam reforming. The TEM images revealed an increase in the mean particle size due to disappearance of smaller, immobile NPs and the resultant growth of the larger NPs. A new approach for predicting the long-term sintering of NPs is presented wherein microscopic observations of the ripening of individual NPs (over a span of a few seconds) are used to extract energetic parameters that allow a description of the collective behavior of the entire population of NPs (over several tens of minutes).
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Cited by
Small molecule-assisted synthesis of carbon supported platinum intermetallic fuel cell catalysts
Song, T.-W., Xu, C., Sheng, Z.-T., Yan, H.-K., Tong, L., Liu, J., Zeng, W.-J., Zuo, L.-J., Yin, P., Zuo, M., et al. (2022) · Nature Communications · doi:10.1038/s41467-022-34037-7 · Cited by 193
Zhu, S., Liu, Y., Gong, Y., Sun, Y., Chen, K., Liu, Y., Liu, W., Xia, T., Zheng, Q., Gao, H., et al. (2024) · Small · doi:10.1002/smll.202305062 · Cited by 18
Metadata
- Authors
- Challa, S. R., Delariva, A. T., Hansen, T. W., Helveg, S., Sehested, J., Hansen, P. L., Garzon, F., & Datye, A. K.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-12-01
- Volume
- 133
- Issue
- 51
- Pages
- 20672-20675
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2068119626
- Cited by
- 305
- References
- 0
- FWCI
- 6.76
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Relating Rates of Catalyst Sintering to the Disappearance of Individual Nanoparticles during Ostwald Ripening. https://app.cochat.ai/papers/10.1021/ja208324n
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- Challa, S. R., Delariva, A. T., Hansen, T. W., Helveg, S., Sehested, J., Hansen, P. L., Garzon, F., & Datye, A. K. (2011). Relating Rates of Catalyst Sintering to the Disappearance of Individual Nanoparticles during Ostwald Ripening. Journal of the American Chemical Society. https://doi.org/10.1021/ja208324n
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