Graphene-based catalyst for CO2 reduction: The critical role of solvents in materials design

Sehmus Ozden, Laurent Delafontaine, Tristan Asset, Shengyuan Guo, Kai A. Filsinger, Rodney D. Priestley, Plamen Atanassov, Craig B. Arnold

Research output: Contribution to journalArticlepeer-review

Abstract

The catalytic reduction of carbon dioxide (CO2) to hydrocarbon fuels offers a tremendous opportunity for a transformational impact on both global energy and environmental sustainability. To enhance the CO2 reduction process, the design and synthesis of novel and efficient catalytic materials with control-over properties are needed. The solvent used in the synthesis of these materials can play a crucial role in tailoring the material properties resulting in changes to their catalytic performance. However, the field still lacks a systematic analysis of the specific effect for different solvents. Here, we report the role of water, ethanol (EtOH), ethylene glycol (EG), Dimethylformamide (DMF), and γ-Butyrolactone (GBL) on the synthesis of reduced graphene oxide (rGO)-copper nanoparticles (CuNP) electrocatalysts used in CO2 reduction reactions (CO2RR). As these solvents contain different terminal groups and molecular sizes, we observed a variation in the d-spacing of the rGO, surface area, nanoparticle yield, and defect density, and characterized the corresponding change in the CO2RR activity. The use of DMF results in higher porosity, d-spacing, yield of CuNP, surface area and defect density which lead to comparatively higher efficiency and selectivity of and selectivity of 19.5 % and 28.4 % for formate and CO, respectively.

Original languageEnglish (US)
Pages (from-to)512-517
Number of pages6
JournalJournal of Catalysis
Volume404
DOIs
StatePublished - Dec 2021

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry

Keywords

  • CO Reduction
  • Catalyst Design
  • Defect-density
  • Graphene
  • Solvent Affect

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