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In Situ XAFS and NMR Study of Rhodium-Catalyzed Dehydrogenation of Dimethylamine Borane
Abstract
In situ X-ray absorption fine structure spectroscopy (XAFS) and 11B NMR were used to study the rhodium-catalyzed dimerization reaction of dimethylaminoborane, (CH3)2NHBH3 or DMAB. XAFS spectra show that the active form of the rhodium catalyst is most likely composed of a six-atom Rh core surrounded by tightly bound external ligands. NMR results show the presence of monomeric dimethylamine borane (CH3)2NBH2, providing evidence that hydrogen formation from the homogeneous Rh species occurs by an intramolecular pathway. This is in contrast to thermal pathways that involve intermolecular B-N concurrent with hydrogen formation. This work shows that in situ XAFS spectroscopy offers a unique experimental tool to differentiate between heterogeneous and homogeneous catalysis.
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Cited by
B–N compounds for chemical hydrogenstorage
Hamilton, C. W., Baker, R. T., Staubitz, A., & Manners, I. (2009) · Chem. Soc. Rev. · doi:10.1039/b800312m · Cited by 1,087
Base Metal Catalyzed Dehydrogenation of Ammonia−Borane for Chemical Hydrogen Storage
Keaton, R. J., Blacquiere, J. M., & Baker, R. T. (2007) · Journal of the American Chemical Society · doi:10.1021/ja066860i · Cited by 658
Efficient Catalysis of Ammonia Borane Dehydrogenation
Denney, M. C., Pons, V., Hebden, T. J., Heinekey, D. M., & Goldberg, K. I. (2006) · Journal of the American Chemical Society · doi:10.1021/ja062419g · Cited by 630
Xu, Q., & Chandra, M. (2006) · Journal of Power Sources · doi:10.1016/j.jpowsour.2006.09.043 · Cited by 601
Chandra, M., & Xu, Q. (2007) · Journal of Power Sources · doi:10.1016/j.jpowsour.2007.03.015 · Cited by 532
Metadata
- Authors
- Chen, Y., Fulton, J. L., Linehan, J. C., & Autrey, T.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-02-18
- Volume
- 127
- Issue
- 10
- Pages
- 3254-3255
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2058622249
- Cited by
- 211
- References
- 0
- FWCI
- 7.94
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chen, Y., Fulton, J. L., Linehan, J. C., & Autrey, T. (2005). In Situ XAFS and NMR Study of Rhodium-Catalyzed Dehydrogenation of Dimethylamine Borane. Journal of the American Chemical Society. https://doi.org/10.1021/ja0437050
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