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Dipole Field Interactions Determine the CO2 Reduction Activity of 2D FeNC Single Atom Catalysts

preprint
revised on 26.03.2020 and posted on 27.03.2020 by Sudarshan Vijay, Joseph Gauthier, Hendrik Heenen, Vanessa Jane Bukas, Henrik Høgh Kristoffersen, Karen Chan

Electrochemical CO2 Reduction (CO2R) can potentially allow for the sustainable production of valuable fuels and chemicals. Recently, single atom catalysts on a 2D support have been shown to be a promising catalyst candidate. Using state-of-the-art methods, we develop a model for Fe doped graphene which rationalises several critical experimental observations: the contentious origin of the pH dependence of reactivity and the dependence of current-potential relationships on active site. We show that single atom catalysts have the unique ability to stabilise different dipoles associated with critical reaction intermediates, which translates to significant shifts in activity. This provides a new rational design principle and paves the way for rigorous computation-guided catalyst design of new single atom catalysts for CO2R.

Funding

The VILLUM Centre for the Science of Sus- tainable Fuels and Chemicals (#9455) from VILLUM FONDEN

History

Email Address of Submitting Author

vijays@fysik.dtu.dk

Institution

Technical University of Denmark

Country

Denmark

ORCID For Submitting Author

0000-0001-8242-0161

Declaration of Conflict of Interest

No conflict of interest

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