Precious Metal Catalysts – Heterogeneous
Technical Characteristics: Noble metals dispersed as nanoparticles or clusters on solid supports
(carbon, alumina, zeolite). Provide stable, recyclable systems with high surface-to-volume ratios.
Applications: Industrial hydrogenation (alkenes, alkynes, nitro compounds), automotive exhaust
treatment (Pt, Pd, Rh), ammonia oxidation (Pt gauze), and electrocatalysis (Pt/C in PEM fuel cells).
Chemical Information: Activity depends on dispersion, crystallite size, and surface coordination.
Electronic interactions with support modify adsorption/desorption properties and reaction
pathways.
Precious Metal Catalysts (Heterogeneous)
Products List
- General Formula: Metal dispersed on support (e.g., 1–5 wt% Pt/Al₂O₃).
- Active Phase: Metallic nanoparticles (Pt⁰, Pd⁰, Rh⁰, etc.).
- Particle Size: Typically 1–10 nm.
- Supports: Al₂O₃, SiO₂, TiO₂, activated carbon, zeolites.
- Property: Catalytic activity depends strongly on dispersion, crystallite size, and support
interaction.