Manganese acting as a high-performance heterogeneous electrocatalyst in carbon dioxide reduction.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31278257.
- Also identified by DOI 10.1038/s41467-019-10854-1 and PMC identifier 6611886.
- 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
Developing highly efficient electrocatalysts based on cheap and earth-abundant metals for CO<sub>2</sub> reduction is of great importance. Here we demonstrate that the electrocatalytic activity of manganese-based heterogeneous catalyst can be significantly improved through halogen and nitrogen dual-coordination to modulate the electronic structure of manganese atom. Such an electrocatalyst for CO<sub>2</sub> reduction exhibits a maximum CO faradaic efficiency of 97% and high current density of ~10 mA cm<sup>-2</sup> at a low overpotential of 0.49 V. Moreover, the turnover frequency can reach 38347 h<sup>-1</sup> at overpotential of 0.49 V, which is the highest among the reported heterogeneous electrocatalysts for CO<sub>2</sub> reduction. In situ X-ray absorption experiment and density-functional theory calculation reveal the modified electronic structure of the active manganese site, on which the free energy barrier for intermediate formation is greatly reduced, thus resulting in a great improvement of CO<sub>2</sub> reduction performance.