CoIn dual-atom catalyst for hydrogen peroxide production via oxygen reduction reaction in acid.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37553335.
- Also identified by DOI 10.1038/s41467-023-40467-8 and PMC identifier 10409757.
- 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
The two-electron oxygen reduction reaction in acid is highly attractive to produce H<sub>2</sub>O<sub>2</sub>, a commodity chemical vital in various industry and household scenarios, which is still hindered by the sluggish reaction kinetics. Herein, both density function theory calculation and in-situ characterization demonstrate that in dual-atom CoIn catalyst, O-affinitive In atom triggers the favorable and stable adsorption of hydroxyl, which effectively optimizes the adsorption of OOH on neighboring Co. As a result, the oxygen reduction on Co atoms shifts to two-electron pathway for efficient H<sub>2</sub>O<sub>2</sub> production in acid. The H<sub>2</sub>O<sub>2</sub> partial current density reaches 1.92 mA cm<sup>-2</sup> at 0.65 V in the rotating ring-disk electrode test, while the H<sub>2</sub>O<sub>2</sub> production rate is as high as 9.68 mol g<sup>-1</sup> h<sup>-1</sup> in the three-phase flow cell. Additionally, the CoIn-N-C presents excellent stability during the long-term operation, verifying the practicability of the CoIn-N-C catalyst. This work provides inspiring insights into the rational design of active catalysts for H<sub>2</sub>O<sub>2</sub> production and other catalytic systems.