# Single-atom catalysts for electrochemical CO2 reduction

Eight screening candidates span metal–nitrogen–carbon site chemistry, oxide-supported single atoms, methane formation, and catalyst-design reviews. Five are primary experimental studies with computational analysis; three are reviews or Accounts. All eight have been proposed to the Library Inbox and await your review.

| Candidate | Study type | Screening focus | Sources |
|---|---|---|---|
| Ju et al. (2017). **Understanding activity and selectivity of metal-nitrogen-doped carbon catalysts for electrochemical reduction of CO2**. *Nature Communications*. | Primary study: experiment + DFT | Compares Mn, Fe, Co, Ni and Cu M–Nx sites; connects CO activity/selectivity to binding-energy descriptors. | [DOI](https://doi.org/10.1038/s41467-017-01035-z); [PubMed and abstract](https://pubmed.ncbi.nlm.nih.gov/29038491/) |
| Su et al. (online 2018; issue 2019). **Single-Atom Catalysis toward Efficient CO2 Conversion to CO and Formate Products**. *Accounts of Chemical Research*. | Review / research Account | Support design and coordination environments; includes Ni single-site electroreduction alongside thermal catalysis and hydrogenation. Broader than electrochemistry alone. | [DOI](https://doi.org/10.1021/acs.accounts.8b00478); [PubMed and abstract](https://pubmed.ncbi.nlm.nih.gov/30512920/) |
| Zhang et al. (2019). **A Graphene-Supported Single-Atom FeN5 Catalytic Site for Efficient Electrochemical CO2 Reduction**. *Angewandte Chemie International Edition*. | Primary study: experiment + DFT | Axial nitrogen coordination and its proposed role in CO desorption and selectivity. | [DOI](https://doi.org/10.1002/anie.201906079); [PubMed and abstract](https://pubmed.ncbi.nlm.nih.gov/31368619/) |
| Li et al. (2020). **Heterogeneous Single-Atom Catalysts for Electrochemical CO2 Reduction Reaction**. *Advanced Materials*. | Review | Focused introduction to CO2-to-CO mechanisms, active-site assignments, synthesis and characterization. A useful first reading for the meeting. | [DOI](https://doi.org/10.1002/adma.202001848); [PubMed and abstract](https://pubmed.ncbi.nlm.nih.gov/32644259/) |
| Zhang et al. (2021). **Silver Single-Atom Catalyst for Efficient Electrochemical CO2 Reduction Synthesized from Thermal Transformation and Surface Reconstruction**. *Angewandte Chemie International Edition*. | Primary study: experiment + DFT | Ag single atoms on MnO2; support reconstruction and conversion of nanoparticles into isolated sites. | [DOI](https://doi.org/10.1002/anie.202014718); [PubMed and abstract](https://pubmed.ncbi.nlm.nih.gov/33274797/) |
| Cai et al. (2021). **Insights on forming N,O-coordinated Cu single-atom catalysts for electrochemical reduction CO2 to methane**. *Nature Communications*. | Primary study: experiment + theory | CuN2O2 coordination and reported methane selectivity; useful for discussing pathways beyond two-electron CO production. | [DOI](https://doi.org/10.1038/s41467-020-20769-x); [PubMed and abstract](https://pubmed.ncbi.nlm.nih.gov/33500393/) |
| Li et al. (2022). **Atomic Tuning of Single-Atom Fe–N–C Catalysts with Phosphorus for Robust Electrochemical CO2 Reduction**. *Nano Letters*. | Primary study: experiment + DFT | Phosphorus modification, Fe electronic structure, and CO-intermediate formation. | [DOI](https://doi.org/10.1021/acs.nanolett.1c04382); [PubMed and abstract](https://pubmed.ncbi.nlm.nih.gov/35104146/) |
| Wang et al. (2022). **Low-dimensional material supported single-atom catalysts for electrochemical CO2 reduction**. *SmartMat*. | Review | Synthesis and optimization of single atoms on low-dimensional supports; complements the mechanism-focused 2020 review. | [DOI and publisher abstract](https://doi.org/10.1002/smm2.1101); [OpenAlex](https://openalex.org/W4220760138) |

Selection used an OpenAlex topic search restricted to 2017–2022 plus bounded citation/reference checks. Titles and publication dates were compared with publisher-deposited Crossref records. Abstracts and study types were inspected in PubMed for seven papers and OpenAlex for the SmartMat review; the Account identifies itself as such in its abstract. This is a targeted screening list, not a systematic review or a full-text assessment.

Dates use journal-issue years where available. The Su Account first appeared online on 4 December 2018 and in a 2019 issue. OpenAlex assigns the silver study to 2020, while PubMed lists the March 2021 issue and Crossref supplies a January 2021 publication date; it is listed here as 2021. Both conventions fall within the requested interval. Chemical subscripts and title typography are normalized for readability.

Suggested reading order: the Li 2020 review, Ju 2017 comparison, then the Fe coordination studies and Cu methane study. Use the Ag study to broaden the discussion beyond carbon-supported M–Nx sites, and the remaining reviews for support-design context.