Chromium-ruthenium oxide solid solution electrocatalyst for highly efficient oxygen evolution reaction in acidic media.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30635581.
- Also identified by DOI 10.1038/s41467-018-08144-3 and PMC identifier 6329788.
- 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 development of active, acid-stable and low-cost electrocatalysts for oxygen evolution reaction is urgent and challenging. Herein we report an Iridium-free and low ruthenium-content oxide material (Cr<sub>0.6</sub>Ru<sub>0.4</sub>O<sub>2</sub>) derived from metal-organic framework with remarkable oxygen evolution reaction performance in acidic condition. It shows a record low overpotential of 178 mV at 10 mA cm<sup>-2</sup> and maintains the excellent performance throughout the 10 h chronopotentiometry test at a constant current of 10 mA cm<sup>-2</sup> in 0.5 M H<sub>2</sub>SO<sub>4</sub> solution. Density functional theory calculations further revealed the intrinsic mechanism for the exceptional oxygen evolution reaction performance, highlighting the influence of chromium promoter on the enhancement in both activity and stability.