Insights in the mechanism of deposition and growth of RuO 2 colloidal nanoparticles over alumina. Implications on the activity for ammonia synthesis

Camila Fernandez,Capucine Sassoye,Nicolas Flores,N Escalona,Eric M Gaigneaux,Clement Sanchez,Patricio Ruiz

Applied Catalysis A: General（2015）

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摘要

•RuO2 colloids deposition can lead to large size distribution of Ru-supported particles.•Firstly attached RuO2 particles act as nucleation points for further RuO2 deposition.•Particle growth results from the sequential deposition of RuO2 on a changing surface.•Larger RuO2 clusters are preferentially formed at the outer surface of alumina.•Poly-sized Ru-supported nanoparticles exhibit catalytic cooperation in NH3 synthesis.

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关键词

Ammonia synthesis,Supported RuO2 nanoparticles,Particle size heterogeneity,Impregnation of RuO2 colloids,Particle growth

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