Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published September 7, 2016 | Supplemental Material
Journal Article Open

Electrocatalysis of CO_2 Reduction in Brush Polymer Ion Gels


The electrochemical characterization of brush polymer ion gels containing embedded small-molecule redox-active species is reported. Gels comprising PS–PEO–PS triblock brush polymer, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIm-TFSI), and some combination of ferrocene (Fc), cobaltocenium (CoCp_2^+), and Re(bpy)(CO)_3Cl (1) exhibit diffusion-controlled redox processes with diffusion coefficients approximately one-fifth of those observed in neat BMIm-TFSI. Notably, 1 dissolves homogeneously in the interpenetrating matrix domain of the ion gel and displays electrocatalytic CO_2 reduction to CO in the gel. The catalytic wave exhibits a positive shift versus Fc^(+/0) compared with analogous nonaqueous solvents with a reduction potential 450 mV positive of onset and 90% Faradaic efficiency for CO production. These materials provide a promising and alternative approach to immobilized electrocatalysis, creating numerous opportunities for application in solid-state devices.

Additional Information

© 2016 American Chemical Society. Received: August 23, 2016; Published: August 25, 2016. This work was supported by the NSF CCI Solar Fuels Program (CHE-1305124). Additional support was provided by King Fahd University of Petroleum and Minerals. C.M.B. thanks the Dreyfus Foundation for Environmental Postdoc Fellowship EP-13-142. A.B.C. thanks the U.S. Department of Defense for support through the NDSEG Fellowship. The authors declare no competing financial interest.

Attached Files

Supplemental Material - ja6b08795_si_001.pdf


Files (1.1 MB)
Name Size Download all
1.1 MB Preview Download

Additional details

August 20, 2023
October 20, 2023