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Atomically Precise Alkynyl-Protected Metal Nanoclusters as a Model Catalyst: Observation of Promoting Effect of Surface Ligands on Catalysis by Metal Nanoparticles
Abstract
Metal nanoclusters whose surface ligands are removable while keeping their metal framework structures intact are an ideal system for investigating the influence of surface ligands on catalysis of metal nanoparticles. We report in this work an intermetallic nanocluster containing 62 metal atoms, Au34Ag28(PhC≡C)34, and its use as a model catalyst to explore the importance of surface ligands in promoting catalysis. As revealed by single-crystal diffraction, the 62 metal atoms in the cluster are arranged as a four-concentric-shell Ag@Au17@Ag27@Au17 structure. All phenylalkynyl (PA) ligands are linearly coordinated to the surface Au atoms with staple "PhC≡C-Au-C≡CPh" motif. Compared with reported thiolated metal nanoclusters, the surface PA ligands on Au34Ag28(PhC≡C)34 are readily removed at relatively low temperatures, while the metal core remains intact. The clusters before and after removal of surface ligands are used as catalysts for the hydrolytic oxidation of organosilanes to silanols. It is, for the first time, demonstrated that the organic-capped metal nanoclusters work as active catalysts much better than those with surface ligands partially or completely removed.
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Cites
Shape-Controlled Synthesis of Pd Nanocrystals and Their Catalytic Applications
Zhang, H., Jin, M., Xiong, Y., Lim, B., & Xia, Y. (2013) · Accounts of Chemical Research · doi:10.1021/ar300209w · Cited by 644
Cited by
Wan, X., Wu, H. B., Guan, B. Y., Luan, D., & Lou, X. W. (. (2020) · Advanced Materials · doi:10.1002/adma.201901349 · Cited by 410
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Metadata
- Authors
- Wang, Y., Wan, X.-K., Ren, L., Su, H., Li, G., Malola, S., Lin, S., Tang, Z., Häkkinen, H., Teo, B. K., Wang, Q.-M., & Zheng, N.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-03-07
- Volume
- 138
- Issue
- 10
- Pages
- 3278-3281
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2295082037
- Cited by
- 358
- References
- 1
- FWCI
- 21.83
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, Y., Wan, X.-K., Ren, L., Su, H., Li, G., Malola, S., Lin, S., Tang, Z., Häkkinen, H., Teo, B. K., Wang, Q.-M., & Zheng, N. (2016). Atomically Precise Alkynyl-Protected Metal Nanoclusters as a Model Catalyst: Observation of Promoting Effect of Surface Ligands on Catalysis by Metal Nanoparticles. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.5b12730
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