Confined Flash Pt<sub>1</sub>/WC<sub><i>x</i></sub> inside Carbon Nanotubes for Efficient and Durable Electrocatalysis.
basic_science · Level V
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- Record sourced from PubMed, PMID 39745543.
- Also identified by DOI 10.1021/acs.nanolett.4c05097.
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Abstract
Exploiting cost-effective hydrogen evolution reaction (HER) catalysts is crucial for sustainable hydrogen production. However, currently reported nanocatalysts usually cannot simultaneously sustain high catalytic activity and long-term durability. Here, we report the efficient synthesis and activity tailoring of a chainmail catalyst, isolated platinum atom anchored tungsten carbide nanocrystals encapsulated inside carbon nanotubes (Pt<sub>1</sub>/WC<sub><i>x</i></sub>@CNTs), by confined flash Joule heating technique. The instantaneous carbothermal reduction reaction enables the millisecond formation of Pt<sub>1</sub>/WC<sub><i>x</i></sub> nanostructures from CNT-encapsulated polyoxometalates, where nanotubes serve as both heating conductors and robust chainmails. The Pt<sub>1</sub>/WC<sub><i>x</i></sub>@CNTs exhibit prominent catalytic performance toward acid HER with a low overpotential of 45.2 mV at 10 mA cm<sup>-2</sup> and long-term durability over 500 h of continuous running. Mechanism studies reveal the strong metal-support interaction on Pt<sub>1</sub>/WC<sub><i>x</i></sub> optimizes the charge redistribution at the Pt<sub>1</sub>-W<sub>2</sub>C interface and the hydrogen adsorption/desorption behavior. This study offers a potential avenue for ultrafast and activity-controllable synthesis of highly stable single-atom catalysts.