×

Recommended by

Indexed by

Unified mechanistic understanding of CO2 reduction to CO on transition metal and single atom catalysts

Sudarshan Vijay1, Wen Ju2, Sven Brückner2, Sze-Chun Tsang1, Peter Strasser2, Karen Chan1*

1 CatTheory, Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark

2 Department of Chemistry, Chemical Engineering Division, Technical University Berlin, Berlin 10623, Germany

* Corresponding authors emails: kchan@fysik.dtu.dk
DOI10.24435/materialscloud:ws-7t [version v1]

Publication date: Sep 28, 2021

How to cite this record

Sudarshan Vijay, Wen Ju, Sven Brückner, Sze-Chun Tsang, Peter Strasser, Karen Chan, Unified mechanistic understanding of CO2 reduction to CO on transition metal and single atom catalysts, Materials Cloud Archive 2021.156 (2021), doi: 10.24435/materialscloud:ws-7t.

Description

CO is the simplest product from CO2 electroreduction (CO2R), but the identity and nature of its rate limiting step remains controversial. Here we investigate the activity of both transition metals (TMs) and metal-nitrogen doped carbon catalysts (MNCs), and a present unified mechanistic picture of CO2R for both these classes of catalysts. By consideration of the electronic structure through a Newns-Andersen model, we find that on MNCs, like TMs, electron transfer to CO2 is facile, such that CO2 (g) adsorption is driven by adsorbate dipole-field interactions. Using density functional theory with explicit consideration of the interfacial field, we find CO2 * adsorption to generally be limiting on TMs, while MNCs can be limited by either CO2* adsorption or by the proton-electron transfer reaction to form COOH*. We evaluate these computed mechanisms against pH-dependent experimental activity measurements on CO2R to CO activity for Au, FeNC, and NiNC. We present a unified activity volcano that, in contrast to previous analyses, includes the decisive CO2* and COOH* binding strengths as well as the critical adsorbate dipole-field interactions. This dataset contains all DFT calculations used in this work.

Materials Cloud sections using this data

No Explore or Discover sections associated with this archive record.

Files

File name Size Description
2021_Unified_NatureCatal_to_MaterialsCloud.zip
MD5md5:b18cabfe1a186f3391a07ee71740b518
2.2 GiB Contains raw DFT calculations and AiiDA archives.

License

Files and data are licensed under the terms of the following license: Creative Commons Attribution 4.0 International.
Metadata, except for email addresses, are licensed under the Creative Commons Attribution Share-Alike 4.0 International license.

Keywords

Catalysis Electrocataylsis Dipole-field H2020

Version history:

2021.156 (version v1) [This version] Sep 28, 2021 DOI10.24435/materialscloud:ws-7t