Highly Deformable and Mobile Palladium Nanocrystals as Efficient Carbon Scavengers

TL;DR

This paper introduces highly deformable palladium nanocrystals that efficiently remove carbon deposits through their unique shape-shifting, self-healing, and regenerative catalytic behavior, offering a promising solution for industrial surface fouling.

Contribution

It demonstrates that flexible, roaming palladium nanoparticles can catalytically eliminate carbon fouling at low temperatures while maintaining crystalline structure and self-regenerating after deactivation.

Findings

Nanoparticles exhibit liquid-like migration with preserved crystal orientation.

Particles can be regenerated by other roaming particles after deactivation.

The approach offers a new pathway for efficient, self-healing catalysis.

Abstract

Fouling of surfaces leads to performance degradation in many energy-intensive industrial processes, but the present solutions are either too complicated to be routinely used or incomplete for eradication. Here we propose and demonstrate that carbon-containing deposits can be catalytically wiped out in an efficient way by roaming palladium nanoparticles with extreme shape flexibility at relatively low temperatures. Surprisingly, during their dramatic liquid-like migrations, these particles could still maintain crystalline interior and conserve their initial crystal orientations through self-surface diffusion. Moreover, these catalytic particles were even able to become regenerated by other roaming particles after occasionally deactivated by surface coking or multiple-particle sintering. These findings shed light on metabolically driven, "living" nanocrystals, and also open a new avenue for efficient catalysis.