When the dimensions of supported precious metals approach the nanometer and sub-nanometer scale, unique catalytic properties emerge related to under-coordinated surface atoms, electronic structure, and diffusion barriers of surface species.1-4 The sub-nanometer and especially single atom catalysts have shown unexpectedly high activity and selectivity to valuable products under realistic catalytic reaction conditions. Despite several successful examples, the thermal stability of precious metal single site catalysts under reaction conditions remains a significant challenge. The synthesis of highly active single-atom catalyst with improved thermal stability attracts both fundamental and industrial interests. Here we demonstrate an approach to improve the thermal stability of uniformly dispersed Pd1 single atom catalysts using ultrathin metal oxide protective coatings.

Towards the thermally stable site-isolated Pd catalysts

252nd National Meeting (2016)

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