Fabrication of a Single‐Atom Platinum Catalyst for the Hydrogen Evolution Reaction: A New Protocol by Utilization of HxMoO3−x with Plasmon Resonance

Single‐atom catalysts (SACs) play a key role in many chemical processes owing to highly desirable atom efficiency, but the challenging synthesis of these catalysts limits their commercialization and application on a large scale. Herein, we report a facile strategy to integrate atomic Pt into richly deficient MoO3−x. The core of the experimental strategy was the fabrication and utilization of HxMoO3−x with plasmon resonance that contained intercalated H+. The obtained catalyst was found to possess remarkable electrocatalytic activity toward the hydrogen evolution reaction that was even comparable to that of commercial Pt/C, whereas the amount of Pt used was reduced to only 10 % of the amount of commercial Pt/C used. Therefore, this work not only supplies a new synthesis route to SACs but also reveals the potential relation between plasmon resonance materials and the fabrication of single‐atom catalysts.