Abstract
To synthesize highly dispersed Ru nanoparticles (NPs) with desired particle size for NH3 decomposition, an appropriate support is crucial. Herein, spherical mesoporous silica (SMS) NPs with ∼3 nm pores are synthesized by a microwave-assisted evaporation-induced self-assembly method and used as support of Ru NPs for NH3 decomposition. Characterization shows that compared to Ru NPs supported on SBA-15 and fumed SiO2, Ru NPs supported on SMS (Ru@SMS) exhibit superior NH3 decomposition performance, achieving a hydrogen generation rate of 31.4 mmol·g-1 cat·min−1 at 500 °C, which is one of the highest reported values for supported Ru catalysts in NH3 decomposition. The excellent NH3 decomposition performance observed on Ru@SMS should be attributed to effective dispersion and appropriate particle size (2.22 ± 0.29 nm) of Ru NPs. This work highlights the potential of SMS as support of Ru catalyst in NH3 decomposition.
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