The Science Behind the Breakthrough

Building Energy Efficient Electrolyzers to Convert CO2 to Industrial Chemicals (“renewable hydrocarbons”)

Dioxide Materials‘ process uses an electrolyzer to convert CO2 into C1 building blocks. Subsequent chemical processes convert the C1 building blocks into high value fuels and chemicals. Dioxide Materials’ patented catalysts lower the cost of converting carbon dioxide into C1 building blocks by a factor of 3. Dioxide materials also has patent pending processes to convert the C1 building blocks into high value chemicals , creating the first cost-competitive route to large volume, renewable fuels and chemicals.

  • How does it work? CO2 converted to CO + O2 in an electrolyzer.
  • What is novel about it? Use combination of metallic and organic catalysts to lower the overpotential by 0.8 V.

Patented Technology

How Does It Work?

CO Formation On Silver

H2O → 2H+ + 2 e‾+ ½ O2

CO2 + 2H+ + 2 e‾ → CO + H2O

HCOOH Formation On Tin

H2O → 2H+ + 2 e‾+ ½ O2

CO2 + 2H+ + 2 e‾ → HCOOH

Electrochemical CO2 Reduction

Co-catalyst Lowers the Overpotential

Challenge for electrochemical reduction of CO2
  • High overpotential due to the formation of intermediate species
  • Low selectivity due to the side reactions
Breakthrough
  • Combined ionic liquid with Ag metal
  • Lowered the overpotential to 0.17V
  • Suppressed side reactions
  • Improved the selectivity to 98%
    Rosen, et al., Science 334, 643 (2011)

Achieving High Selectivity

Why such good performance?

EMIM creates low barrier pathway
EMIM blocks side reactions
High Selectivity

Dioxide Materials’ Advantage

Our Advantages

Better Materials
Better Performance

CO2 Electrolyzer

Breakthrough CO2 Electrolyzer Performance