Abstract
Multi-walled carbon nanotubes were used to deposit Ru metal by electrostatic adsorption and incipient wetness impregnation methods, respectively. The electrostatic adsorption method led to small (1.8–2.5nm) and highly dispersed (0.51–0.72 dispersion) Ru metal nanoparticles. The initial hydrogen generation turnover rates over Ru catalysts with different metal particle sizes showed that ammonia borane hydrolysis reaction is structure-sensitive; large Ru particles displayed high turnover rates. Multiwalled carbon nanotube-supported Ru nanoparticles exhibit high turnover rate and low activation energy for the hydrolysis of ammonia borane because of hydrogen spillover effect associated with strong interaction between Ru metal and carbon nanotubes.
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