Highly selective and active CO2 reduction electrocatalysts based on cobalt phthalocyanine/carbon nanotube hybrid structures

Xing Zhang, Zishan Wu, Xiao Zhang, Liewu Li, Yanyan Li, Haomin Xu, Xiaoxiao Li, Xiaolu Yu, Zisheng Zhang, Yongye Liang () and Hailiang Wang ()
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Xing Zhang: South University of Science and Technology of China
Zishan Wu: Yale University
Xiao Zhang: South University of Science and Technology of China
Liewu Li: South University of Science and Technology of China
Yanyan Li: South University of Science and Technology of China
Haomin Xu: South University of Science and Technology of China
Xiaoxiao Li: South University of Science and Technology of China
Xiaolu Yu: South University of Science and Technology of China
Zisheng Zhang: South University of Science and Technology of China
Yongye Liang: South University of Science and Technology of China
Hailiang Wang: Yale University

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Electrochemical reduction of carbon dioxide with renewable energy is a sustainable way of producing carbon-neutral fuels. However, developing active, selective and stable electrocatalysts is challenging and entails material structure design and tailoring across a range of length scales. Here we report a cobalt-phthalocyanine-based high-performance carbon dioxide reduction electrocatalyst material developed with a combined nanoscale and molecular approach. On the nanoscale, cobalt phthalocyanine (CoPc) molecules are uniformly anchored on carbon nanotubes to afford substantially increased current density, improved selectivity for carbon monoxide, and enhanced durability. On the molecular level, the catalytic performance is further enhanced by introducing cyano groups to the CoPc molecule. The resulting hybrid catalyst exhibits >95% Faradaic efficiency for carbon monoxide production in a wide potential range and extraordinary catalytic activity with a current density of 15.0 mA cm−2 and a turnover frequency of 4.1 s−1 at the overpotential of 0.52 V in a near-neutral aqueous solution.

Date: 2017
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DOI: 10.1038/ncomms14675

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