Metal

Catalysis

Platinum nanoparticles

Engineering

Nanoparticle

Metallurgy

Materials science

Inorganic chemistry

Chemical engineering

Microporous material

Nanotechnology

Organic chemistry

Zeolite

Noble metal

Precious metal

Composite material

Chemistry

Bifunctional

Platinum

Science

Maximizing the utilization of noble metals is crucial for applications such as catalysis. We found that the minimum loading of platinum for optimal performance in the hydroconversion of n -alkanes for industrially relevant bifunctional catalysts could be reduced by a factor of 10 or more through the rational arranging of functional sites at the nanoscale. Intentionally depositing traces of platinum nanoparticles on the alumina binder or the outer surface of zeolite crystals, instead of inside the zeolite crystals, enhanced isomer selectivity without compromising activity. Separation between platinum and zeolite acid sites preserved the metal and acid functions by limiting micropore blockage by metal clusters and enhancing access to metal sites. Reduced platinum nanoparticles were more active than platinum single atoms strongly bonded to the alumina binder.

Maximizing noble metal utilization in solid catalysts by control of nanoparticle location