Ammine metal borohydrides [M(BH4)m(NH3)n, AMBs] are promising materials for low temperature (&lt; 200°C) hydrogen generation. However, in most of these complexes H2 and NH3 are released simultaneously, leading to unacceptable H2 purity for the fuel cell. Although we showed previously that base metal catalysts could reduce ammonia production from thermolysis of M(BH4)3(NH3)4 (M = Y, La), in situ reduction of the metal precursor led to partial degradation of the AMB.1 Building on recent reports using ammonia-borane to prepare metal nanoparticles,2 we now report synthesis of base metal nanoparticle catalysts (Co, Cu, Fe) using neat hexylamine-borane which allows for the B-Cl impurities to be washed away. Use of these nanoparticles for the catalytic dehydrogenation of these MBA complexes will be presented. Furthermore, improved results for Zn MBAs3 using Fe nanoparticles will be detailed. [1] Mostajeran, M.; Brar, N.; Baker, R. T., submitted for publication. [2] a) Zheng, N. ; Fan, J. ; Stucky, G. D. J. Am. Chem. Soc. 2006, 128, 6550. b) Kalidindi, S. B. ; Sanyal, U.; Jagirdar, B. R. ChemSusChem 2011, 4, 317. c) Sanyal, U.; Jagirdar, B. R. Inorg. Chem. 2012, 51, 13023. [3] Gu, Q. et al. Energy Environ. Sci. 2012, 5, 7590.

Cleaning the stream: Catalytic H2 release from ammine metal borohydrides

251st National Meeting (2016)

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