Design of a High Throughput 25-Well Parallel Electrolyzer for the Accelerated Discovery of CO2 Reduction Catalysts via a Combinatorial Approach

Authors

  • Tram Dang,

    1. Materials Science and Engineering, University of California – San Diego, 9500 Gilman Drive MC 0418, La Jolla, California 92093, USA
    Search for more papers by this author
  • Richard Ramsaran,

    1. Materials Science and Engineering, University of California – San Diego, 9500 Gilman Drive MC 0418, La Jolla, California 92093, USA
    Search for more papers by this author
  • Sayak Roy,

    1. Department of Chemistry and Biochemistry, University of California – San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, USA
    Search for more papers by this author
  • Jesse Froehlich,

    1. Department of Chemistry and Biochemistry, University of California – San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, USA
    Search for more papers by this author
  • Joseph Wang,

    1. Department of Nanoengineering, University of California – San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, USA
    Search for more papers by this author
  • Clifford P. Kubiak

    Corresponding author
    1. Department of Chemistry and Biochemistry, University of California – San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, USA
    • Department of Chemistry and Biochemistry, University of California – San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, USA
    Search for more papers by this author

Abstract

A combinatorial approach is described for screening homogeneous CO2 reduction electrocatalysts by means of a high-throughput 25-well parallel electrolyzer. Active catalysts were then screened by three methods: (1) the presence of CO gas in the electrolyzer head space; (2) a pH change for the individual solutions before and after bulk electrolysis due to proton consumption during CO2 reduction; and (3) other physical attributes. Based on these screening methods, two solutions out of the 25 were selected for further study. One out of two selected solutions, nickel cyclam, a well-known CO2 reduction electrocatalyst, was correctly identified to be the most active.

Ancillary