Perforated membranes for the efficient conversion of carbon monoxide to organic compounds
Described herein are devices and methods for the facile, efficient electrocatalytic conversion of carbon monoxide to high purity formic acid and other organic compounds. The described devices utilize perforated membranes to reduce energy requirements and extend electrochemical cell life by reducing damage caused by fluids being formed between internal ion exchange membranes.
1. A device comprising:
an anode;
a cathode; and
a cationic exchange membrane and an anionic exchange membrane positioned between the anode and cathode;
wherein at least one of the cationic exchange membrane and the anionic exchange membrane is a perforated ion exchange membrane;
wherein the device is an electrochemical cell for the conversion of carbon monoxide to organic compounds via electrolysis;
wherein perforated ion exchange membrane is a cathode catalyst coated membrane.
2. The device of claim 1 , wherein the perforated ion exchange membrane has void space selected from the range of 0.1% to 50% of a surface area of the perforated ion exchange membrane.
3. The device of claim 1 , wherein the perforated ion exchange membrane comprises alternating parallel segments of membrane separated by void space.
4. The device of claim 1 , wherein the cathode catalyst coated membrane comprises Pt/HSC or Pt/V.
5. The device of claim 1 , wherein the perforated ion exchange membrane comprises Nafion.
6. The device of claim 1 , wherein the cathode is a gas diffusion electrode.
7. The device of claim 1 , wherein the cathode comprises a porous carbon electrode and a cathode catalyst.
8. The device of claim 1 , wherein the cationic exchange membrane is proximate to the anode and the anionic exchange membrane is proximate to the cathode.
9. The device of claim 1 , wherein the anion exchange membrane comprises a functionalized poly (aryl piperidinium) polymer.
10. The device of claim 1 , wherein the anode comprises a porous carbon electrode.
11. The device of claim 1 , wherein the anode comprises an anode catalyst.
12. A device comprising:
an anode comprising a porous carbon electrode and an anode catalyst;
a cathode comprising a porous carbon electrode and a cathode catalyst;
a perforated cationic exchange membrane positioned between the anode and the cathode; and
an anionic exchange membrane positioned between the anode and the cathode;
a second ion exchange membrane, which is anionic and positioned proximate to the cathode;
wherein the device is an electrochemical cell for the conversion of carbon monoxide to formic acid via electrolysis;
wherein the second ion exchange membrane is perforated.
13. The device of claim 12 , wherein the perforated ion exchange membrane has void space greater than or equal to 10% of a surface area of the perforated ion exchange membrane.
14. The device of claim 13 , wherein the perforated ion exchange membrane comprises alternating parallel segments of membrane separated by void space.
15. The device of claim 12 , wherein perforated ion exchange membrane is a cathode catalyst coated membrane, positioned proximate to the anode.
16. A method comprising:
providing an electrochemical cell comprising:
an anode;
a cathode; and
a cationic exchange membrane and an anionic exchange membrane positioned between the anode and cathode;
wherein at least one of the cationic exchange membrane and the anionic exchange membrane is a perforated ion exchange membrane;
wherein perforated ion exchange membrane is a cathode catalyst coated membrane;
generating an electrical current between the anode and the cathode;
flowing carbon monoxide gas to the cathode, thereby reacting the carbon monoxide gas and generating organic compounds.
17. The method of claim 16 , wherein the perforated ion exchange membrane has void space greater than or equal to 10% of a surface area of the perforated ion exchange membrane.