An integrated platinum-nanocarbon electrocatalyst for efficient oxygen reduction.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36344552.
- Also identified by DOI 10.1038/s41467-022-34444-w and PMC identifier 9640595.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Efficient and robust platinum-carbon electrocatalysts are of great significance for the long-term service of high-performance fuel cells. Here, we report a Pt alloy integrated in a cobalt-nitrogen-nanocarbon matrix by a multiscale design principle for efficient oxygen reduction reaction. This Pt integrated catalyst demonstrates an increased mass activity, 11.7 times higher than that of commercial Pt catalyst, and retains a stability of 98.7% after 30,000 potential cycles. Additionally, this integrated catalyst delivers a current density of 1.50 A cm<sup>-2</sup> at 0.6 V in the hydrogen-air fuel cell and achieves a power density of 980 mW cm<sup>-2</sup>. Comprehensive investigations demonstrate that the synergistic contribution of components and structure in the platinum-carbon integrated catalyst is responsible for the high-efficiency ORR in fuel cells.