Fabrication of Gold and Silver Nanoparticles Supported on Zinc Imidazolate Metal-Organic Frameworks as Active Catalysts for Hydrogen Release from Ammonia Borane.

ABSTRACT: Well-dispersed Au and Ag nanoparticles (NPs) have been immobilized on a zinc imidazolate metal-organic framework, Zn(mim), using the "one-pot" method and tested as catalysts in ammonia borane hydrolysis. The AuNPs@Zn(mim) and AgNPs@Zn(mim) materials were characterized by FTIR, XRD, ICP-OES, TGA, BET, SEM, and TEM. The AgNPs@Zn(mim) catalyst showed a high yield (98.5%) and high hydrogen generation rate (3352.71 mL min^-1 g_Ag ^-1) in NH₃BH₃ dehydrogenation. The determined activation energies (19.6 kJ mol^-1 for AuNPs@Zn(mim) and 38.13 kJ mol^-1 for AgNPs@Zn(mim)) are lower than those for most reported catalysts containing Au/Ag-MOF used in the hydrolysis of NH₃BH₃. Moreover, the catalysts tested he

SUBMITTER: Souza ES 

PROVIDER: S-EPMC11447819 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature