AI Article Synopsis
- - The study focuses on improving carbon dioxide reduction for methane production using a new catalyst, N-heterocyclic carbene (NHC)-ligated copper single atom site (Cu SAS) embedded in a metal-organic framework, achieving an impressive Faradaic efficiency of 81% at a specific voltage.
- - The catalyst maintains a high methane Faradaic efficiency of over 70% across various potential ranges and boasts a notable turnover frequency of 16.3 s⁻¹, indicating its effectiveness.
- - The study highlights that the NHC enhances the electron density on the copper sites, aiding in the adsorption of reaction intermediates, while the catalyst's porosity improves the flow of carbon dioxide, optimizing the catalytic
Article Abstract
The exploitation of highly efficient carbon dioxide reduction (CO RR) electrocatalyst for methane (CH ) electrosynthesis has attracted great attention for the intermittent renewable electricity storage but remains challenging. Here, N-heterocyclic carbene (NHC)-ligated copper single atom site (Cu SAS) embedded in metal-organic framework is reported (2Bn-Cu@UiO-67), which can achieve an outstanding Faradaic efficiency (FE) of 81 % for the CO reduction to CH at -1.5 V vs. RHE with a current density of 420 mA cm . The CH FE of our catalyst remains above 70 % within a wide potential range and achieves an unprecedented turnover frequency (TOF) of 16.3 s . The σ donation of NHC enriches the surface electron density of Cu SAS and promotes the preferential adsorption of CHO* intermediates. The porosity of the catalyst facilitates the diffusion of CO to 2Bn-Cu, significantly increasing the availability of each catalytic center.
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| http://dx.doi.org/10.1002/anie.202114450 | DOI Listing |
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