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Highly Efficient Colloidal Cobalt- and Rhodium-Catalyzed Hydrolysis of H3N·BH3 in Air

Clark, Timothy J., Whittell, George R., Manners, Ian·2007·Inorganic Chemistry

Abstract

The compound H3N.BH3 (1) is currently attracting considerable attention as a potential hydrogen storage material. Group 9 catalysts which rapidly and conveniently hydrolyze aqueous 1 in air are described. When treated with 1 mol % [{Rh(mu-Cl)(1,5-cod)}2] (cod=cyclooctadiene) in air, aqueous 1 undergoes rapid hydrolysis to afford the ionic species [NH4][BO2] in approximately 40 s. Higher catalyst loadings (3 mol %) result in a reduction in reaction time to 10 s. Quantification of the hydrogen evolved revealed that, on average, 2.8 of a maximum possible 3.0 equivalents (93%) were generated during the course of the reaction. Rh(0) species (e.g., Rh black, Rh stabilized on alumina, aqueous Rh colloids) were also found to be active hydrolysis catalysts, and evidence for a heterogeneous mechanism is provided. Significantly, although Ir(0) colloids are less active, aqueous Co(0) colloids are also effective catalysts for this process. This result is particularly important as Co, a first-row metal, is considerably more economical than the precious metal catalysts typically employed.

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Metadata

Authors
Clark, T. J., Whittell, G. R., & Manners, I.
Venue
Inorganic Chemistry
Published
2007-07-31
Volume
46
Issue
18
Pages
7522-7527
ISSN
  • 0020-1669 (ISSN-L)
  • 1520-510X
OpenAlex
W2043373963
Cited by
210
References
1
FWCI
12.43
Type
journal article
Language
en
Open access
closed

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