Single Nanoparticle Collision Electrocatalysis Driven by Ultrafast High-Temperature Precision Synthesis.

The single nanoparticle (NP) collision strategy offers a promising alternative to traditional ensemble methods in electrocatalysis, providing unique insights into catalytic behavior that cannot be captured by ensemble-based techniques. However, synthesizing colloidal NP catalysts with tunable composition, uniform size, and near-pristine surfaces remains a significant challenge. Here, using PtxRu1-x alloys as a model system, we propose an innovative strategy that combines ultrafast high-temperature precision synthesis with ultrasonic exfoliation. This approach enables the preparation of colloidal catalysts with the desired properties, which were previously difficult to achieve. Single NP collision electrocatalysis uncovers the composition-dependent intrinsic activity of the methanol oxidation reaction (MOR) at industrial current densities, bypassing mass transfer limitations. Density functional theory (DFT) calculations highlight the Pt-Ru synergistic effect in optimizing MOR performance. This study, for the first time, integrates ultrafast precision synthesis with single NP electrocatalysis, providing a new framework for the development of highly efficient catalysts.