Electrochemical CO2 Reduction Single Atom Alloy Catalyst
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Debabrata Bagchi presented a literature presentation on single atom alloy catalysts for electrochemical CO2 reduction. The presentation discussed techniques for synthesizing and characterizing single atom alloys, their use as electrocatalysts, and studies showing copper-lead and bismuth-copper single atom alloys can selectively reduce CO2 to formic acid. DFT modeling suggested the single atom alloys reduce the free energy of CO2 hydrogenation intermediates relative to pure copper catalysts.
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Electrochemical CO2 Reduction Single Atom Alloy Catalyst
- 1. Literature Presentation Debabrata Bagchi Ph. D. Student 09/07/2022 Electrochemical CO2 reduction on Single atom alloy catalyst 1
- 2. 2 Single atom catalysis Chem. Rev. 2020, 120, 11703-11809
- 3. 3 Techniques for characterization SAC Chem. Rev. 2020, 120, 11703-11809
- 4. 4 SAC in Electrocatalysis Chem. Rev. 2020, 120, 12217-12314
- 5. 5
- 6. Epoxide gelation approach for Synthesis CuCl2·2H2O Pb(NO3)2 515mg 115mg 2ml isopropanol 2ml propylene oxide & 0.2ml H2O Sonication 60°C under vacuum 1 day Gel Cu–Pb precursor Pb1Cu- SAA In-situ −500mAcm−2 for 30min 6
- 7. 7 Characterization : Cu–Pb precursor
- 10. 10 EXAFS analysis “Unfortunately, we failed to detect Pb signals in situ, probably due to the strong background interference caused by the fluorescence of Cu”
- 13. 13 ECO2RR study in H-cell
- 15. 15
- 16. 16 CO2 reduction cell with solid electrolyte Solid-state electrolyte (SSE) to produce electrolyte-free liquid products styrene-divinylbenzene sulfonated co-polymer
- 17. 17 proton-conducting solid electrolyte HCOOH formation
- 18. 18 Control study: Catalyst design
- 20. 20 In situ IR and Raman Pb@Cu
- 21. 21 Electrodeposition thin Cu layer thick Cu layer
- 22. 22 Other isolated modifier: Bi on Cu
- 23. 23 Bi1Cu-SAA
- 24. 24 In1Cu-SAA
- 25. 25 Bi1Cu-SAA vs. In1Cu-SAA universal effect of single atom alloying strategy
- 27. 27 Solvation effect : Model HCOO* COOH*
- 28. 28 DFT Study
- 29. 29
Editor's Notes
- mixing of electrolyte and liquid products
- This result implies the substantial protonation of the carbon in CO2 instead of oxygen protonation
- In general, when covered by a thin-layer Cu, the isolated Pb could still activate the surface Cu, and thus regulate the CO2RR reaction pathway towards formate as a modifier to activate the neighboring Cu sites
- 16 H2O molecules were applied in one unit cell, establishing the water layer over 12 Å.